Re: [kvm-devel] Compilation problems with git tree
2008/4/8, Marcelo Tosatti [EMAIL PROTECTED]: On Tue, Apr 08, 2008 at 01:03:58AM +0200, Zdenek Kabelac wrote: Hi I've tried to compile git tree for kvm-userspace.git I've used these configure options: --disable-gcc-check --with-patched-kernel using x86-64 platform I've got this error: pc.o: In function `pc_init1': /home/kabi/export/kvm-userspace/qemu/hw/pc.c:987: undefined reference to `kvm_pit_init' collect2: ld returned 1 exit status Obviously kvm_pit_init seems to be compiled in only for i386 - I've disables this code by #if 0 Update your host kernel. It seems backward compatibility is broken. Core was generated by `qemu-kvm -s -m 320 -smp 2 -net nic,model=pcnet -net user -redir'. Program terminated with signal 11, Segmentation fault. #0 0x004849a7 in tcp_reass (tp=0x7fabec000d60, ti=0xec000d60, m=0x0) at slirp/tcp_input.c:208 Hmm - to get fixed first compilation problem - or the second coredump crash ? Because I need to use some combination of other kernel trees for now I'll stay with linux git tree 2.6.25-rc8 - hopefully patches from kvm git tree will get there soon. I think I'll survive the occasional crash (2x/day) caused by this backward incompatibility. As compared with kvm-64 I no longer experience sudden qemu-kvm stops, which I had to resolve by attaching strace to qemu procees - that magically 'unfreezed' qemu and it was happening quite often. Zdenek - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Register now and save $200. Hurry, offer ends at 11:59 p.m., Monday, April 7! Use priority code J8TLD2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
[kvm-devel] Compilation problems with git tree
Hi I've tried to compile git tree for kvm-userspace.git I've used these configure options: --disable-gcc-check --with-patched-kernel using x86-64 platform I've got this error: ar rcs libqemu.a exec.o kqemu.o cpu-exec.o host-utils.o translate-all.o translate.o op.o tcg/tcg.o tcg/tcg-dyngen.o tcg/tcg-runtime.o qemu-kvm.o fpu/softfloat-native.o helper.o helper2.o qemu-kvm-x86.o kvm-tpr-opt.o qemu-kvm-helper.o disas.o i386-dis.o gcc -L /home/kabi/export/kvm-userspace/qemu/../libkvm -g -m64 -o qemu-system-x86_64 vl.o osdep.o monitor.o pci.o loader.o isa_mmio.o migration.o block-raw-posix.o lsi53c895a.o esp.o usb-ohci.o eeprom93xx.o eepro100.o ne2000.o pcnet.o rtl8139.o e1000.o hypercall.o virtio.o virtio-net.o virtio-blk.o device-hotplug.o ide.o pckbd.o ps2.o vga.o sb16.o es1370.o dma.o fdc.o mc146818rtc.o serial.o i8259.o i8254.o pcspk.o pc.o cirrus_vga.o apic.o parallel.o acpi.o piix_pci.o usb-uhci.o vmmouse.o vmport.o vmware_vga.o extboot.o gdbstub.o ../libqemu_common.a libqemu.a -lm -lz -lkvm -lgnutls -lrt -lpthread -lutil -lSDL -lpthread -lcurses pc.o: In function `pc_init1': /home/kabi/export/kvm-userspace/qemu/hw/pc.c:987: undefined reference to `kvm_pit_init' collect2: ld returned 1 exit status Obviously kvm_pit_init seems to be compiled in only for i386 - I've disables this code by #if 0 But then during code run I've got this coredump: 'ti' seems to be containing some garbage - am I using the latest code ?? (as this is the last commit I could see: commit 5208ce19dca268f84a2b9441c2fbb6129161e44c Author: Marcelo Tosatti [EMAIL PROTECTED] Date: Thu Apr 3 20:24:37 2008 -0300) Core was generated by `qemu-kvm -s -m 320 -smp 2 -net nic,model=pcnet -net user -redir'. Program terminated with signal 11, Segmentation fault. #0 0x004849a7 in tcp_reass (tp=0x7fabec000d60, ti=0xec000d60, m=0x0) at slirp/tcp_input.c:208 208 if (ti == (struct tcpiphdr *)tp || ti-ti_seq != tp-rcv_nxt) Missing separate debuginfos, use: debuginfo-install SDL.x86_64 glibc.x86_64 gnutls.x86_64 libX11.x86_64 libXau.x86_64 libXcursor.x86_64 libXdmcp.x86_64 libXext.x86_64 libXfixes.x86_64 libXrandr.x86_64 libXrender.x86_64 libgcrypt.x86_64 libgpg-error.x86_64 libtasn1.x86_64 libxcb.x86_64 ncurses.x86_64 zlib.x86_64 (gdb) bt #0 0x004849a7 in tcp_reass (tp=0x7fabec000d60, ti=0xec000d60, m=0x0) at slirp/tcp_input.c:208 #1 0x00485c3b in tcp_input (m=0x2ba7260, iphlen=value optimized out, inso=value optimized out) at slirp/tcp_input.c:1052 #2 0x00406aa1 in qemu_send_packet (vc1=0x2b9b0b0, buf=0x2c9dd58 RT, size=54) at /home/kabi/export/kvm-userspace/qemu/vl.c:3758 #3 0x00426211 in pcnet_transmit (s=0x2c9d990) at /home/kabi/export/kvm-userspace/qemu/hw/pcnet.c:1272 #4 0x00426898 in pcnet_poll_timer (opaque=value optimized out) at /home/kabi/export/kvm-userspace/qemu/hw/pcnet.c:1335 #5 0x00426f30 in pcnet_ioport_writew (opaque=0x7fabec000d60, addr=0, val=0) at /home/kabi/export/kvm-userspace/qemu/hw/pcnet.c:1617 #6 0x005050f1 in kvm_outw (opaque=value optimized out, addr=0, data=0) at /home/kabi/export/kvm-userspace/qemu/qemu-kvm.c:515 #7 0x005252b4 in handle_io (kvm=0x2ac4000, run=0x7fac0bc73000, vcpu=1) at libkvm.c:721 #8 0x00525972 in kvm_run (kvm=0x2ac4000, vcpu=1) at libkvm.c:889 #9 0x00505636 in kvm_cpu_exec (env=value optimized out) at /home/kabi/export/kvm-userspace/qemu/qemu-kvm.c:146 #10 0x005058e0 in ap_main_loop (_env=value optimized out) at /home/kabi/export/kvm-userspace/qemu/qemu-kvm.c:330 #11 0x00371600740a in start_thread () from /lib64/libpthread.so.0 #12 0x0037154e678d in clone () from /lib64/libc.so.6 Zdenek - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Register now and save $200. Hurry, offer ends at 11:59 p.m., Monday, April 7! Use priority code J8TLD2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] [PATCH] prepopulate guest pages after write-protecting
2008/4/4, Marcelo Tosatti [EMAIL PROTECTED]: Zdenek reported a bug where a looping dmsetup status eventually hangs on SMP guests. The problem is that kvm_mmu_get_page() prepopulates the shadow MMU before write protecting the guest page tables. By doing so, it leaves a window open where the guest can mark a pte as present while the host has shadow cached such pte as notrap. Accesses to such address will fault in the guest without the host having a chance to fix the situation. Great - this looks like it has fixed my problems with busy looping processes - lets see if it will fix other weird behaviours I'm seeing with kvm :) Zdenek - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] Qemu-kvm is leaking my memory ???
2008/3/24, Avi Kivity [EMAIL PROTECTED]:
Avi Kivity wrote:
Tested - and actually seeing no difference in my case of memory leak.
Still it looks like over 30M per execution of qemu is lost.
(tested with fresh 2.6.25-rc6 with your patch)
Can you double check? 2.6.25-rc6 definitely leaks without, and here it
doesn't with the patch.
btw, there's an additional patch I have queued up that might have an
effect. please test the attached (which is my 2.6.25 queue).
Yep - I've made a quick short test - and it looks promising - so far I
can not see the leak
with your additional patch.
But I still have get my busy loop problem. Though now it's sometime
stack-back-traced on the leaveq - maybe this instruction might cause
some problems ??
Before this patch - I've always got the back-trace at the point of
copy_user_generic_string -
now its slightly different -- and still applies when I run the second
dmsetup status - it unblocks the looped one)
Call Trace:
[8803558d] :dm_mod:dm_compat_ctl_ioctl+0xd/0x20
[802bd352] compat_sys_ioctl+0x182/0x3d0
[80283d20] vfs_write+0x130/0x170
[80221192] sysenter_do_call+0x1b/0x66
Call Trace:
[88032100] ? :dm_mod:table_status+0x0/0x90
[80436809] ? error_exit+0x0/0x51
[88032100] ? :dm_mod:table_status+0x0/0x90
[8032d157] ? copy_user_generic_string+0x17/0x40
[880332d7] ? :dm_mod:copy_params+0x87/0xb0
[80237b11] ? __capable+0x11/0x30
[88033469] ? :dm_mod:ctl_ioctl+0x169/0x260
[80340712] ? tty_ldisc_deref+0x62/0x80
[8034320c] ? tty_write+0x22c/0x260
[8803358d] ? :dm_mod:dm_compat_ctl_ioctl+0xd/0x20
[802bd352] ? compat_sys_ioctl+0x182/0x3d0
[80283d20] ? vfs_write+0x130/0x170
[80221192] ? sysenter_do_call+0x1b/0x66
Here is dissambled dm_compat_ctl_ioctl:
1fa0 dm_compat_ctl_ioctl:
return (long)ctl_ioctl(command, (struct dm_ioctl __user *)u);
}
#ifdef CONFIG_COMPAT
static long dm_compat_ctl_ioctl(struct file *file, uint command, ulong u)
{
1fa0: 55 push %rbp
1fa1: 89 f7 mov%esi,%edi
1fa3: 48 89 e5mov%rsp,%rbp
return r;
}
static long dm_ctl_ioctl(struct file *file, uint command, ulong u)
{
return (long)ctl_ioctl(command, (struct dm_ioctl __user *)u);
1fa6: 89 d6 mov%edx,%esi
1fa8: e8 73 fd ff ff callq 1d20 ctl_ioctl
#ifdef CONFIG_COMPAT
static long dm_compat_ctl_ioctl(struct file *file, uint command, ulong u)
{
return (long)dm_ctl_ioctl(file, command, (ulong) compat_ptr(u));
}
1fad: c9 leaveq
return r;
}
static long dm_ctl_ioctl(struct file *file, uint command, ulong u)
{
return (long)ctl_ioctl(command, (struct dm_ioctl __user *)u);
1fae: 48 98 cltq
#ifdef CONFIG_COMPAT
static long dm_compat_ctl_ioctl(struct file *file, uint command, ulong u)
{
return (long)dm_ctl_ioctl(file, command, (ulong) compat_ptr(u));
}
1fb0: c3 retq
Zdenek
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Re: [kvm-devel] Qemu-kvm is leaking my memory ???
2008/3/23, Avi Kivity [EMAIL PROTECTED]: Avi Kivity wrote: I see the same issue too now, and am investigating. The attached patch should fix the issue. It is present in 2.6.25-rc6 only, and not in kvm.git, which is why few people noticed it. Hi Tested - and actually seeing no difference in my case of memory leak. Still it looks like over 30M per execution of qemu is lost. (tested with fresh 2.6.25-rc6 with your patch) Also now I'd have said that before my dmsetup status loop test case was not causing big problems and it was just enough to run another dmsetup to unblock the loop - now it's usually leads to some wierd end of qemu itself - will explore more So it's probably fixing some bug - and exposing another. As I said before - in my debuger it was looping in page_fault hadler - i.e. memory should be paged_in - but as soon as the handler return to the code to continue memcopy - new page_fault is invoked and pointer couters are not changed. Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
[kvm-devel] Coredump from qemu
Hi During execution of qemu I've got this crash: #0 0x00407a29 in qemu_mod_timer (ts=0x2e8cf90, expire_time=130685351465) at /usr/src/debug/kvm-63/qemu/vl.c:1073 #1 0x00425590 in pcnet_ioport_writew (opaque=0x0, addr=1836332585, val=8090216) at /usr/src/debug/kvm-63/qemu/hw/pcnet.c:1617 #2 0x00501cf1 in kvm_outw (opaque=value optimized out, addr=13865, data=29288) at /usr/src/debug/kvm-63/qemu/qemu-kvm.c:457 #3 0x0051e2a0 in kvm_run (kvm=0x2dbb030, vcpu=1) at libkvm.c:719 #4 0x00501646 in kvm_cpu_exec (env=value optimized out) at /usr/src/debug/kvm-63/qemu/qemu-kvm.c:127 #5 0x005021a5 in kvm_main_loop_cpu (env=0x2e8f010) at /usr/src/debug/kvm-63/qemu/qemu-kvm.c:307 #6 0x00502302 in ap_main_loop (_env=value optimized out) at /usr/src/debug/kvm-63/qemu/qemu-kvm.c:338 #7 0x00353420740a in start_thread () from /lib64/libpthread.so.0 #8 0x0035336e5d1d in clone () from /lib64/libc.so.6 (gdb) print alarm_timer $1 = (struct qemu_alarm_timer *) 0x0 It happend during detach of gdb and quit of the qemu itsell - I assume no all timers were probably stoped when quit_timers was executed ? Maybe check for non NULL pointer is enough qemu_mod_timer? I'm using kvm64 fedora rawhide packages. Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] Qemu-kvm is leaking my memory ???
2008/3/16, Avi Kivity [EMAIL PROTECTED]: Zdenek Kabelac wrote: Hello Recently I'm using qemu-kvm on fedora-rawhide box with my own kernels (with many debug options) I've noticed that over the time my memory seems to disappear somewhere. Here is my memory trace after boot and some time of work - thus memory should be populated. No idea how these should add up. What does 'free' say? Ok - here goes my free log (I'm loggin free prior each start of my qemu-kvm so here is the log for this afternoon: (I'm running same apps all the time - except during kernel compilation I'm reading some www pages - and working with gnome-terminal - so some slightly more memory could have been eaten by them - but not in the range of hundreds of MB) Wed Mar 19 12:54:38 CET 2008 total used free sharedbuffers cached Mem: 20074601525240 482220 0 18060 469812 -/+ buffers/cache:1037368 970092 Swap:0 0 0 Wed Mar 19 13:27:51 CET 2008 total used free sharedbuffers cached Mem: 20074601491672 515788 0 13024 404220 -/+ buffers/cache:1074428 933032 Swap:0 0 0 Wed Mar 19 13:51:38 CET 2008 total used free sharedbuffers cached Mem: 20074601513000 494460 0 12676 366708 -/+ buffers/cache:1133616 873844 Swap:0 0 0 Wed Mar 19 14:05:30 CET 2008 total used free sharedbuffers cached Mem: 20074601976592 30868 0 12220 785672 -/+ buffers/cache:1178700 828760 Swap:0 0 0 Wed Mar 19 14:13:52 CET 2008 total used free sharedbuffers cached Mem: 20074601865500 141960 0 14592 633136 -/+ buffers/cache:1217772 789688 Swap:0 0 0 Wed Mar 19 14:16:04 CET 2008 total used free sharedbuffers cached Mem: 20074601533432 474028 0 5852 304736 -/+ buffers/cache:1222844 784616 Swap:0 0 0 Wed Mar 19 15:05:33 CET 2008 total used free sharedbuffers cached Mem: 20074601545796 461664 0 4100 276756 -/+ buffers/cache:1264940 742520 Swap:0 0 0 Wed Mar 19 15:14:07 CET 2008 total used free sharedbuffers cached Mem: 20074601748680 258780 0 8324 427172 -/+ buffers/cache:1313184 694276 Swap:0 0 0 -now it's: total used free sharedbuffers cached Mem: 20074601784952 222508 0 20644 335360 -/+ buffers/cache:1428948 578512 Swap:0 0 0 and top-twenty memory list of currently running processes: top - 15:52:29 up 19:07, 12 users, load average: 0.33, 0.30, 0.60 Tasks: 298 total, 1 running, 296 sleeping, 1 stopped, 0 zombie Cpu(s): 1.6%us, 3.3%sy, 0.0%ni, 95.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2007460k total, 1770748k used, 236712k free,20304k buffers Swap:0k total,0k used,0k free, 335036k cached PID PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 15974 20 0 655m 207m 28m S 0.0 10.6 3:31.31 firefox 3980 20 0 378m 63m 10m S 1.3 3.2 1:00.53 gnome-terminal 2657 20 0 481m 58m 9928 S 2.3 3.0 19:16.03 Xorg 12492 20 0 494m 34m 17m S 0.0 1.8 1:20.52 pidgin 3535 20 0 336m 22m 12m S 0.0 1.2 0:15.41 gnome-panel 3571 20 0 265m 16m 10m S 0.0 0.9 0:06.25 nm-applet 3638 20 0 298m 16m 9296 S 0.0 0.8 0:36.79 wnck-applet 3546 20 0 458m 16m 10m S 0.0 0.8 1:21.65 gnome-power-man 3579 20 0 261m 16m 8252 S 0.0 0.8 0:02.65 python 3532 20 0 200m 15m 8144 S 0.3 0.8 1:14.34 metacity 3754 20 0 325m 14m 9856 S 0.0 0.7 0:00.42 mixer_applet2 3909 20 0 243m 14m 7988 S 0.0 0.7 0:06.13 notification-da 3706 20 0 330m 14m 9764 S 0.0 0.7 0:01.40 clock-applet 3534 20 0 449m 13m 9884 S 0.0 0.7 0:00.92 nautilus 3540 20 0 250m 12m 8616 S 0.3 0.6 0:07.30 pk-update-icon 3708 20 0 300m 12m 7940 S 0.0 0.6 0:03.15 gnome-keyboard- 3752 20 0 290m 11m 8028 S 0.0 0.6 0:00.27 gnome-brightnes 3553 20 0 286m 11m 8144 S 0.0 0.6 0:04.29 krb5-auth-dialo 3761 20 0 270m 11m 7968 S 0.0 0.6 0:23.02 cpufreq-applet 2898 20 0 328m 10m 8240 S 0.0 0.5 0:07.95 gnome-settings- 3702 20 0 282m 9436 7460 S 0.0 0.5 0:00.25 drivemount_appl 3749 20 0 288m 8848 6924 S 0.0 0.4 0:00.11 gnome-inhibit-a 3756
Re: [kvm-devel] Qemu-kvm is leaking my memory ???
2008/3/19, Avi Kivity [EMAIL PROTECTED]: Zdenek Kabelac wrote: 2008/3/16, Avi Kivity [EMAIL PROTECTED]: Zdenek Kabelac wrote: Hello Recently I'm using qemu-kvm on fedora-rawhide box with my own kernels (with many debug options) I've noticed that over the time my memory seems to disappear somewhere. Here is my memory trace after boot and some time of work - thus memory should be populated. No idea how these should add up. What does 'free' say? Ok - here goes my free log (I'm loggin free prior each start of my qemu-kvm so here is the log for this afternoon: (I'm running same apps all the time - except during kernel compilation I'm reading some www pages - and working with gnome-terminal - so some slightly more memory could have been eaten by them - but not in the range of hundreds of MB) Can you make sure that it isn't other processes? Go to runlevel 3 and start the VM using vnc or X-over-network? Hmmm not really sure what do you mean by external VNC - I could grab this info once I'll finish some work today and kill all the apps running in the system - so most of the memory should be released - will go to single mode for this - is this what do you want ? What host kernel and kvm version are you using? Usually running quite up-to-date Linus git tree kernel - Both host/guest are running 2.6.25-rc6 kernels For compiling using gcc-4.3 kvm itself is fedora rawhide package: kvm-63-2.fc9.x86_64 (somehow I've troubles to compile the kvm-userspace git tree as libkvm mismatches my kernel version - which probably means I would have to use kvm linux kernel to use kvm-userspace ??) (actually why the gcc-3.x is preferred when this compiler is IMHO far more broken then 4.3 ?) I think I've already posted my configuration already several times if it's needed I'll repost again - I've many debugging features enabled for my kernels (yet having no idea how to use them to detect my lost memory :)) Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
[kvm-devel] Oopses with Oprofile and qemu-kvm
Hi I'm trying various thing with qemu to resolve my other issue and I've tried to use oprofile. But as soon as I run these: opcontrol --vmlinux=mine/vmlinux opcontrol --start I get kernel oops (see bellow) Is the fault in qemu (i.e. NMI is not emulated) or do I have to use some other tools ? Or should I report this to lkml ? [ 59.423311] oprofile: using NMI interrupt. [ 65.125411] general protection fault: [1] PREEMPT SMP [ 65.128156] CPU 1 [ 65.128156] Modules linked in: oprofile nfs lockd nfs_acl sunrpc autofs4 dm_mod loop rtc psmouse evdev serio_raw i2c _piix4 pcnet32 mii i2c_core button [ 65.128156] Pid: 2584, comm: udevd Not tainted 2.6.25-rc5-replic-server #52 [ 65.128156] RIP: 0010:[881043e9] [881043e9] :oprofile:nmi_save_registers+0x49/0xb0 [ 65.128156] RSP: :81001f89bf78 EFLAGS: 0002 [ 65.128156] RAX: 0001 RBX: RCX: 00c1 [ 65.128156] RDX: 88106400 RSI: RDI: 81001b9513a8 [ 65.128156] RBP: 81001f89bf78 R08: 0020 R09: 81001b951410 [ 65.128156] R10: 0002 R11: 0001 R12: 881043a0 [ 65.128156] R13: 0001 R14: R15: 81001c1c65a0 [ 65.128156] FS: () GS:81001f80f190(0063) knlGS:f7d79720 [ 65.128156] CS: 0010 DS: 002b ES: 002b CR0: 8005003b [ 65.128156] CR2: f7dad1b0 CR3: 1b93b000 CR4: 06e0 [ 65.128156] DR0: DR1: DR2: [ 65.128156] DR3: DR6: 0ff0 DR7: 0400 [ 65.128156] Process udevd (pid: 2584, threadinfo 81001b004000, task 81001bba8000) [ 65.128156] Stack: 81001f89bfa8 8101f74f aaab 81001c0f1d68 [ 65.128156] 810002666220 81001b005c30 8100d25b [ 65.128156] 81001b005c30 EOI 81001b005d48 0001 [ 65.128156] Call Trace: [ 65.128156] IRQ [8101f74f] smp_call_function_interrupt+0x4f/0x80 [ 65.128156] [8100d25b] call_function_interrupt+0x6b/0x70 [ 65.128156] EOI [8109bd60] ? __do_fault+0x240/0x580 [ 65.128156] [8109bcdd] ? __do_fault+0x1bd/0x580 [ 65.128156] [8109df4d] ? handle_mm_fault+0x26d/0x8c0 [ 65.128156] [812f8cac] ? do_page_fault+0x3fc/0xb50 [ 65.128156] [81058171] ? hrtimer_start+0xe1/0x1a0 [ 65.128156] [8106157a] ? get_lock_stats+0x2a/0x70 [ 65.128156] [810615ce] ? put_lock_stats+0xe/0x30 [ 65.128156] [810415b3] ? do_setitimer+0x393/0x3b0 [ 65.128156] [812f59b2] ? _spin_unlock_irq+0x32/0x80 [ 65.128156] [81063461] ? trace_hardirqs_on+0x131/0x190 [ 65.128156] [812f59bd] ? _spin_unlock_irq+0x3d/0x80 [ 65.128156] [810415b3] ? do_setitimer+0x393/0x3b0 [ 65.128156] [812f5151] ? trace_hardirqs_on_thunk+0x35/0x3a [ 65.128156] [812f646d] ? error_exit+0x0/0xa9 [ 65.128156] [ 65.128156] [ 65.128156] Code: b8 60 c6 10 88 4c 8b 88 68 c6 10 88 85 c9 74 3b 8d 41 ff 31 f6 4c 8d 40 01 49 c1 e0 04 0f 1f 44 00 00 48 8b 0c 37 48 85 c9 74 17 0f 32 48 c1 e2 20 89 c0 48 09 c2 89 54 37 0c 48 c1 ea 20 89 54 [ 65.128156] RIP [881043e9] :oprofile:nmi_save_registers+0x49/0xb0 [ 65.128156] RSP 81001f89bf78 [ 65.128156] ---[ end trace e503d3702565a4da ]--- [ 65.128156] Kernel panic - not syncing: Aiee, killing interrupt handler! Or another one: [ 69.388548] oprofile: using NMI interrupt. [ 78.377689] general protection fault: [1] PREEMPT SMP [ 78.378754] CPU 0 [ 78.378754] Modules linked in: oprofile nfs lockd nfs_acl sunrpc autofs4 dm_mod loop psmouse i2c_piix4 evdev rtc ser io_raw i2c_core pcnet32 mii button [ 78.378754] Pid: 506, comm: udevd Not tainted 2.6.25-rc5-replic-server #52 [ 78.378754] RIP: 0010:[881063e9] [881063e9] :oprofile:nmi_save_registers+0x49/0xb0 [ 78.378754] RSP: 0018:81559f78 EFLAGS: 0002 [ 78.378754] RAX: 0001 RBX: RCX: 00c1 [ 78.378754] RDX: 88108400 RSI: RDI: 81001b589000 [ 78.378754] RBP: 81559f78 R08: 0020 R09: 81001b589270 [ 78.378754] R10: 0002 R11: 0001 R12: 881063a0 [ 78.378754] R13: 0001 R14: 81001f20c000 R15: [ 78.378754] FS: () GS:8148c000(0063) knlGS:f7e59720 [ 78.378754] CS: 0010 DS: 002b ES: 002b CR0: 8005003b [ 78.378754] CR2: 080f0d78 CR3: 1f109000 CR4: 06e0 [ 78.378754] DR0: DR1: DR2: [ 78.378754] DR3: DR6: 0ff0 DR7: 0400 [ 78.378754] Process udevd (pid: 506, threadinfo 81001f204000, task
[kvm-devel] Qemu-kvm is leaking my memory ???
Hello Recently I'm using qemu-kvm on fedora-rawhide box with my own kernels (with many debug options) I've noticed that over the time my memory seems to disappear somewhere. Here is my memory trace after boot and some time of work - thus memory should be populated. MemTotal: 2007460 kB MemFree:618772 kB Buffers: 46044 kB Cached: 733156 kB SwapCached: 0 kB Active: 613384 kB Inactive: 541844 kB SwapTotal: 0 kB SwapFree:0 kB Dirty: 148 kB Writeback: 0 kB AnonPages: 376152 kB Mapped: 67184 kB Slab:80340 kB SReclaimable:50284 kB SUnreclaim: 30056 kB PageTables: 27976 kB NFS_Unstable:0 kB Bounce: 0 kB CommitLimit: 1003728 kB Committed_AS: 810968 kB VmallocTotal: 34359738367 kB VmallocUsed: 71244 kB VmallocChunk: 34359666419 kB 618772 + 46044 + 733156 + 148 + 376152 + 67184 + 80340 + 50284 + 30056 + 27976 = 2030112 2GB (though could be wrong - I could be wrong and adding something improperly) And this memory listing is when I work during the day with qemu-kvm do something like 30-50 qemu restarts. Then before I rebooted the machine I've killed nearly all running task (i.e no Xserver, most of services turned of) MemTotal: 2007416 kB MemFree:652412 kB Buffers: 7 kB Cached: 607144 kB SwapCached: 0 kB Active: 571464 kB Inactive: 709796 kB SwapTotal: 0 kB SwapFree:0 kB Dirty: 0 kB Writeback: 0 kB AnonPages:6408 kB Mapped: 4844 kB Slab:52620 kB SReclaimable:32752 kB SUnreclaim: 19868 kB PageTables: 1468 kB NFS_Unstable:0 kB Bounce: 0 kB CommitLimit: 1003708 kB Committed_AS:33988 kB VmallocTotal: 34359738367 kB VmallocUsed: 68152 kB VmallocChunk: 34359668731 kB I've have expected much more free memory here and I definitely do not see how this could combine 2GB of my memory: 652412 + 7 + 607144 + 6408 + 4844 + 52620 + 32752 + 19868 + 1468 = 1447516 1.4GB so where is my 600MB piece of memory hiding ? Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/11, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/9, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/7, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/5, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/5, Avi Kivity [EMAIL PROTECTED]: Andi Kleen wrote: Avi Kivity [EMAIL PROTECTED] writes: Most likely movs emulation is broken for long counts. Please post a disassembly of copy_user_generic_string to make sure we're looking at the same code. Be careful -- this code is patched at runtime and what you see in the vmlinux is not necessarily the same that is executed If the disassembled instruction isn't marked as an alternative in the source, then it can't be patched, right? Hello Any progress on this - It looks like I get this bug quite often when I test device-mapper code. Hello I've made some more experiments and noticed few more things: a) - it is just enough to run parallel loop with cat LVM partition /dev/null and dmsetup status b) when I insert for() loop for zeroing allocated memory in the dm-ioctl copy_params function my loop start once the memory crosses exactly 4KB boundary (visible from register content) c) in my trace log I could usually always see this pattern: [ 160.634897] [812ee5ba] preempt_schedule_irq+0x5a/0xa0 [ 160.634897] [8100cf46] retint_kernel+0x26/0x30 from the look in the arch/x86/kernel/entry64.s I could really see there is some potentiality for internal loop that may call preempt_schedule_irq in upon some check in exit_intr - but having actually now idea what's this all about... I've put there just some extra dump_stack trace in the preempt_schedule_irq - and it's really being printed - but quite slowly actually considering process eats 100% CPU So anyone has any idea what might be wrong ? Hello I've some more news here - it looks I've found working setup on my C2D. All I need to do is compile my 64bit kernel with optimization for space. This will magical start to work - at least in this case. I'll now probably slowly try to figure out which directory with -Os compilation makes the difference. Also I've noticed that standard Debian 2.6.24-4-686 kernel loops in Qemu, but 486 version doesn't. Argh - being stupid here - it looks like these 'working' kernels were not SMP actually. As long as the SMP is used - I still get the busy loop :( Now being clueless Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/12, Andi Kleen [EMAIL PROTECTED]: Argh - being stupid here - it looks like these 'working' kernels were not SMP actually. As long as the SMP is used - I still get the busy loop :( Now being clueless Sorry don't have the cycles to look into your problem, but the standard procedure for hard problems that can be reproduced is to git bisect them down to the change set that introduced the problem originally and then complain to whoever authored that. The problem is - I don't know about any working SMP kernel which would survive this test - thought haven't got into a really big history - tried something like 2.6.22 kernels - no luck - also many kernel seems to be unbootable in SMP mode on my machine giving many oopses - in fact just 2.6.24 series starts to be at least reliable in booting in my Qemu setup without failing during disk mounting or in some other place... Will try to find probably some 2.6.18 kernel and will check what happens. On the other hand - I've tried to replicate my bug on few other machines with no luck actually - so it's something which might not be easy to trace :( Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/12, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/12, Andi Kleen [EMAIL PROTECTED]: Argh - being stupid here - it looks like these 'working' kernels were not SMP actually. As long as the SMP is used - I still get the busy loop :( Now being clueless Sorry don't have the cycles to look into your problem, but the standard procedure for hard problems that can be reproduced is to git bisect them down to the change set that introduced the problem originally and then complain to whoever authored that. The problem is - I don't know about any working SMP kernel which would survive this test - thought haven't got into a really big history - tried something like 2.6.22 kernels - no luck - also many kernel seems to be unbootable in SMP mode on my machine giving many oopses - in fact just 2.6.24 series starts to be at least reliable in booting in my Qemu setup without failing during disk mounting or in some other place... Will try to find probably some 2.6.18 kernel and will check what happens. On the other hand - I've tried to replicate my bug on few other machines with no luck actually - so it's something which might not be easy to trace :( Btw - just for testing purposes - I've taken current fedora rawhide kernel. Started machine with this kernel and installed it into qemu guest as well. And this is what I get when running in SMP mode: BUG: soft lockup - CPU#1 stuck for 61s! [udevd:583] CPU 1: Modules linked in: floppy ata_piix ata_generic pata_acpi pcnet32 mii libata scsi_m od Pid: 583, comm: udevd Not tainted 2.6.25-0.105.rc5.fc9 #1 RIP: 0010:[8113b907] [8113b907] clear_page_c+0x7/0x10 RSP: :810015455b20 EFLAGS: 00010246 RAX: RBX: 810015455be8 RCX: 0200 RDX: 06a0 RSI: 810015455a74 RDI: 810015001000 RBP: 8100 R08: 15562000 R09: 8100 R10: 0292 R11: 0001 R12: 3000 R13: 81009540 R14: 810015454000 R15: 0001 FS: () GS:810017509320(0063) knlGS:f7f1d720 CS: 0010 DS: 002b ES: 002b CR0: 8005003b CR2: 810015001000 CR3: 159e9000 CR4: 06a0 DR0: DR1: DR2: DR3: DR6: 0ff0 DR7: 0400 Call Trace: [810833ac] ? get_page_from_freelist+0x51f/0x6b6 [810838ae] ? __alloc_pages+0xed/0x3c3 [8109d5d8] ? alloc_pages_current+0x100/0x109 [81082e4e] ? __get_free_pages+0xe/0x4d [810f0d4b] ? show_stat+0x2a/0x4af [810838ae] ? __alloc_pages+0xed/0x3c3 [8109d5d8] ? alloc_pages_current+0x100/0x109 [81082e4e] ? __get_free_pages+0xe/0x4d [810a621d] ? __kmalloc+0x3e/0xf0 [810c555f] ? seq_read+0x143/0x2a2 [810c5532] ? seq_read+0x116/0x2a2 [810c541c] ? seq_read+0x0/0x2a2 [810c541c] ? seq_read+0x0/0x2a2 [810e9df5] ? proc_reg_read+0x8a/0xa7 [810ab489] ? vfs_read+0xab/0x154 [810ab5f6] ? sys_read+0x47/0x70 [81023f32] ? ia32_sysret+0x0/0xa (Full trace attached) So I guess I'm kind of lucky that my own kernels actually boot in smp mode properly. Guest was started with 384MB - host has 2GB - around 1GB was free when started. Kernel boots with nosmp flag. Zdenek qemu-debian.tty Description: Binary data - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/9, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/7, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/5, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/5, Avi Kivity [EMAIL PROTECTED]: Andi Kleen wrote: Avi Kivity [EMAIL PROTECTED] writes: Most likely movs emulation is broken for long counts. Please post a disassembly of copy_user_generic_string to make sure we're looking at the same code. Be careful -- this code is patched at runtime and what you see in the vmlinux is not necessarily the same that is executed If the disassembled instruction isn't marked as an alternative in the source, then it can't be patched, right? Hello Any progress on this - It looks like I get this bug quite often when I test device-mapper code. Hello I've made some more experiments and noticed few more things: a) - it is just enough to run parallel loop with cat LVM partition /dev/null and dmsetup status b) when I insert for() loop for zeroing allocated memory in the dm-ioctl copy_params function my loop start once the memory crosses exactly 4KB boundary (visible from register content) c) in my trace log I could usually always see this pattern: [ 160.634897] [812ee5ba] preempt_schedule_irq+0x5a/0xa0 [ 160.634897] [8100cf46] retint_kernel+0x26/0x30 from the look in the arch/x86/kernel/entry64.s I could really see there is some potentiality for internal loop that may call preempt_schedule_irq in upon some check in exit_intr - but having actually now idea what's this all about... I've put there just some extra dump_stack trace in the preempt_schedule_irq - and it's really being printed - but quite slowly actually considering process eats 100% CPU So anyone has any idea what might be wrong ? Hello I've some more news here - it looks I've found working setup on my C2D. All I need to do is compile my 64bit kernel with optimization for space. This will magical start to work - at least in this case. I'll now probably slowly try to figure out which directory with -Os compilation makes the difference. Also I've noticed that standard Debian 2.6.24-4-686 kernel loops in Qemu, but 486 version doesn't. So if anyone starts to get idea what could be wrong... - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/7, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/5, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/5, Avi Kivity [EMAIL PROTECTED]: Andi Kleen wrote: Avi Kivity [EMAIL PROTECTED] writes: Most likely movs emulation is broken for long counts. Please post a disassembly of copy_user_generic_string to make sure we're looking at the same code. Be careful -- this code is patched at runtime and what you see in the vmlinux is not necessarily the same that is executed If the disassembled instruction isn't marked as an alternative in the source, then it can't be patched, right? Hello Any progress on this - It looks like I get this bug quite often when I test device-mapper code. Hello I've made some more experiments and noticed few more things: a) - it is just enough to run parallel loop with cat LVM partition /dev/null and dmsetup status b) when I insert for() loop for zeroing allocated memory in the dm-ioctl copy_params function my loop start once the memory crosses exactly 4KB boundary (visible from register content) c) in my trace log I could usually always see this pattern: [ 160.634897] [812ee5ba] preempt_schedule_irq+0x5a/0xa0 [ 160.634897] [8100cf46] retint_kernel+0x26/0x30 from the look in the arch/x86/kernel/entry64.s I could really see there is some potentiality for internal loop that may call preempt_schedule_irq in upon some check in exit_intr - but having actually now idea what's this all about... I've put there just some extra dump_stack trace in the preempt_schedule_irq - and it's really being printed - but quite slowly actually considering process eats 100% CPU So anyone has any idea what might be wrong ? Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/5, Zdenek Kabelac [EMAIL PROTECTED]: 2008/3/5, Avi Kivity [EMAIL PROTECTED]: Andi Kleen wrote: Avi Kivity [EMAIL PROTECTED] writes: Most likely movs emulation is broken for long counts. Please post a disassembly of copy_user_generic_string to make sure we're looking at the same code. Be careful -- this code is patched at runtime and what you see in the vmlinux is not necessarily the same that is executed If the disassembled instruction isn't marked as an alternative in the source, then it can't be patched, right? Hello Any progress on this - It looks like I get this bug quite often when I test device-mapper code. Should I test something special ? Also I'm seeing some problems with nfs - not yet tracked down, but I'd like to get bugs fixed after another. Also about two times qemu-kvm coredumped - unfortunately it's compiled without debugs thus the traceback was not really useful to make any report... Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/5, Avi Kivity [EMAIL PROTECTED]: Andi Kleen wrote: Avi Kivity [EMAIL PROTECTED] writes: Most likely movs emulation is broken for long counts. Please post a disassembly of copy_user_generic_string to make sure we're looking at the same code. Be careful -- this code is patched at runtime and what you see in the vmlinux is not necessarily the same that is executed If the disassembled instruction isn't marked as an alternative in the source, then it can't be patched, right? Incidentially that might cause problems. Specific to kvm? how? As for me - I'm note sure were this bug come from - I just can easily reproduce it on my box with Qemu-kvm - the problem could be also directly in kernel - (either MMU or dm) - I just know the bug is not reproducible with vmware nor natively running code. On the other hand Qemu-kvm easily catches racing bugs compared with native execution - so maybe it's exposing some MMU problem. I've traced the problem to the instruction place - but I'm not sure how to help more with this issue - so if anyone has some idea what else should I check - let me know. I've got an idea to replace rep movqs with plain asm loop - does anyone thinks it might be worth to check this ?? Zdenek PS: In the attachment there is my config file - thought there is probably nothing special config.bz2 Description: BZip2 compressed data - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
[kvm-devel] loop in copy_user_generic_string
Hello I'm having weird problem and being a bit puzzled about where to look for this bug. I'm using T61 - C2D 2GB So I'll describe symptoms: When I run inside my 0.5G smp qemu-kvm guest with Debian these two loops in parallel: 'while : ; do dmsetup status ; done' and 'while : ; do cat /dev/zero /dev/mapper/any_free_to_use_lvm_partition ; done' after a while dmsetup start to loop in this place: [ 356.257323] dmsetup R running task0 3385 2342 [ 356.257323] 81001c9fbc58 812ee85e 0001 [ 356.257323] 00070617 0001 81001be94000 81001f864000 [ 356.257323] 81001be94360 00018100cddc 81001be94000 812f13b1 [ 356.257323] Call Trace: [ 356.257323] [812ee85e] ? thread_return+0x99/0x51b [ 356.257323] [812f13b1] ? trace_hardirqs_on_thunk+0x35/0x3a [ 356.257323] [81065749] ? trace_hardirqs_on+0x139/0x1a0 [ 356.257323] [812f13b1] ? trace_hardirqs_on_thunk+0x35/0x3a [ 356.257323] [8100cddc] ? restore_args+0x0/0x30 [ 356.257323] [8117c017] ? copy_user_generic_string+0x17/0x40 [ 356.257323] [8804c527] ? :dm_mod:copy_params+0x87/0xb0 [ 356.257323] [81047d11] ? __capable+0x11/0x30 [ 356.257323] [8804c6b9] ? :dm_mod:ctl_ioctl+0x169/0x260 [ 356.257323] [8804c7dd] ? :dm_mod:dm_compat_ctl_ioctl+0xd/0x20 [ 356.257323] [810f6c12] ? compat_sys_ioctl+0x182/0x3d0 [ 356.257323] [810bbba0] ? vfs_write+0x130/0x170 [ 356.257323] [812f13eb] ? trace_hardirqs_off_thunk+0x35/0x37 [ 356.257323] [8102aec2] ? sysenter_do_call+0x1b/0x70 [ 356.257323] [812f13b1] ? trace_hardirqs_on_thunk+0x35/0x3a I'm using preemptible kernel and the code will stay in the copy_user_generic_string call forever eating 100%cpu - without preemption the kernel gets dead. With preemption when I run at this moment second dmsetup status in paralllel the busy-looped dmsetup gets finished and while loop starts to continue agains until next dmsetup busy-loop. I've noticed that if I change inside drivers/md/dm-ioctl.c copy_params the parameter tmp.data_size in the copy_from_user call to just page size (4kB) - or when I replace vmalloc to kmalloc - the busy loop will not happen. So it seems to be related to page jump somehow Anyway might have any idea - what is going on here ? Thanks Zdenek Cc me please I'm not a litst member. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
Re: [kvm-devel] loop in copy_user_generic_string
2008/3/4, Avi Kivity [EMAIL PROTECTED]: Zdenek Kabelac wrote: Hello I'm having weird problem and being a bit puzzled about where to look for this bug. I'm using T61 - C2D 2GB So I'll describe symptoms: When I run inside my 0.5G smp qemu-kvm guest with Debian these two loops in parallel: 'while : ; do dmsetup status ; done' and 'while : ; do cat /dev/zero /dev/mapper/any_free_to_use_lvm_partition ; done' after a while dmsetup start to loop in this place: [ 356.257323] [8117c017] ? copy_user_generic_string+0x17/0x40 I'm using preemptible kernel and the code will stay in the copy_user_generic_string call forever eating 100%cpu - without preemption the kernel gets dead. With preemption when I run at this moment second dmsetup status in paralllel the busy-looped dmsetup gets finished and while loop starts to continue agains until next dmsetup busy-loop. I've noticed that if I change inside drivers/md/dm-ioctl.c copy_params the parameter tmp.data_size in the copy_from_user call to just page size (4kB) - or when I replace vmalloc to kmalloc - the busy loop will not happen. So it seems to be related to page jump somehow Anyway might have any idea - what is going on here ? Most likely movs emulation is broken for long counts. Please post a disassembly of copy_user_generic_string to make sure we're looking at the same code. Is it emulated ? I've thought it's running natively with vmx? Anyway here is objdump of copy_user_64.o (loops on 0x1d7) 01c0 copy_user_generic_string: 1c0: 41 89 c8mov%ecx,%r8d 1c3: 89 d1 mov%edx,%ecx 1c5: c1 e9 03shr$0x3,%ecx 1c8: 83 e2 07and$0x7,%edx 1cb: 74 0a je 1d7 copy_user_generic_string+0x17 1cd: f3 48 a5rep movsq %ds:(%rsi),%es:(%rdi) 1d0: 89 d1 mov%edx,%ecx 1d2: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 1d4: 89 c8 mov%ecx,%eax 1d6: c3 retq 1d7: f3 48 a5rep movsq %ds:(%rsi),%es:(%rdi) 1da: 31 c0 xor%eax,%eax 1dc: c3 retq 1dd: 48 8d 04 ca lea(%rdx,%rcx,8),%rax 1e1: eb 02 jmp1e5 copy_user_generic_string+0x25 1e3: 89 c8 mov%ecx,%eax 1e5: 45 85 c0test %r8d,%r8d 1e8: 74 08 je 1f2 copy_user_generic_string+0x32 1ea: 89 c1 mov%eax,%ecx 1ec: 50 push %rax 1ed: 31 c0 xor%eax,%eax 1ef: f3 aa rep stos %al,%es:(%rdi) 1f1: 58 pop%rax 1f2: c3 retq Zdenek - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
