Re: Fresh install of Windows XP hangs early in boot?
On Tue, Jul 29, 2008 at 10:27:14PM -0700, Roland Dreier wrote: > > Known problem: > > http://www.nabble.com/LSI:-avoid-infinite-loops-p17116605.html > > I tried this hack (and actually made the magic insns number 500), and > doing an XP install I got > > lsi_scsi: error: Reselect with pending DMA > > do you have any feeling if this is because the script execution got > stopped too soon? Or is this likely a further issue? Perhaps the context that was stopped due to > 500 instructions was handling a DMA operation that didnt finish. Since the hack won't restart execution by itself, the driver executed a command (probably SIGP) to restart, leaving the DMA operation unfinished. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
Roland Dreier wrote: > Hm, your comment later on makes me think you tried this on AMD. If so, I have > also run into a similar problem with Windows guests under AMD. After installing > WinDbg, it told me that it was a "Paging Request in Non-Paged memory" related to > the Video memory area. Does yours look similar to that? I have not had time to > track it further than that, though. Yes, I got a bluescreen on an AMD host but not an Intel host. And the bluescreen (I posted earlier) said "PAGE_FAULT_IN_NONPAGED_AREA" I've had bad luck with outdated BIOSes on AMD. If you have a Barcelona, try updating your BIOS. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
> Hm, your comment later on makes me think you tried this on AMD. If so, I > have > also run into a similar problem with Windows guests under AMD. After > installing > WinDbg, it told me that it was a "Paging Request in Non-Paged memory" > related to > the Video memory area. Does yours look similar to that? I have not had > time to > track it further than that, though. Yes, I got a bluescreen on an AMD host but not an Intel host. And the bluescreen (I posted earlier) said "PAGE_FAULT_IN_NONPAGED_AREA" - R. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
Roland Dreier wrote: > BTW I tried using if=ide to install Windows XP and got a blue screen > during the installer. What are people doing to run XP in a kvm guest? Hm, your comment later on makes me think you tried this on AMD. If so, I have also run into a similar problem with Windows guests under AMD. After installing WinDbg, it told me that it was a "Paging Request in Non-Paged memory" related to the Video memory area. Does yours look similar to that? I have not had time to track it further than that, though. Chris Lalancette -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
> Known problem: > http://www.nabble.com/LSI:-avoid-infinite-loops-p17116605.html I tried this hack (and actually made the magic insns number 500), and doing an XP install I got lsi_scsi: error: Reselect with pending DMA do you have any feeling if this is because the script execution got stopped too soon? Or is this likely a further issue? - R. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
> > BTW I tried using if=ide to install Windows XP and got a blue screen . > during the installer. What are people doing to run XP in a kvm guest? Funnily enough installing XP SP2 with if=ide worked fine on an Intel host. I notice that I left off -std-vga on the working install too (I used it on the AMD host that blue-screened). Anyway, just another data point. Let me know if any other data would help. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
On Tuesday 29 July 2008 04:00:06 pm Roland Dreier wrote: > I'd be willing to take a stab at a better fix. Thanks, Roland for volunteering. I has been nearly 10 years since I worked on low-level hardware programming and I figured it would take me too long just to become familiar with SCRIPTS, then try to figure out the Windows "black box". That's why I haven't taken a stab at it. However, I'd be more than happy to test any patches you may have. I have a couple of development environments where I could play around and test any fixes. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
> > BTW I tried using if=ide to install Windows XP and got a blue screen > > during the installer. What are people doing to run XP in a kvm guest? > Are you using a recent version of kvm-userspace/kernel modules? Please > save the blue screen and mail it to the list or fill a bug. Pretty recent... this is with kvm modules from vanilla mainline 2.6.27-rc1 and kvm-72 userspace from Debian. Host is a 64-bit kernel running on AMD CPU (no NPT). Here's the bluescreen -- it seems the same as the last install, so pretty reproducible: <>
Re: Fresh install of Windows XP hangs early in boot?
On Tue, Jul 29, 2008 at 07:57:34PM -0300, Marcelo Tosatti wrote: > On Tue, Jul 29, 2008 at 03:00:06PM -0700, Roland Dreier wrote: > > > Known problem: > > > http://www.nabble.com/LSI:-avoid-infinite-loops-p17116605.html > > > > > Windows driver has scripts code which busy loops on main memory. Since > > > that executes in vcpu context, the cpu won't ever get a chance to change > > > the variable which the SCSI emulation is looping at. > > > > Thanks Marcelo (and Alberto) for pointing me at this. > > > > > The proposed hack, however, is half-assed (see Paul Brook's comments on > > > that thread). > > > > I'd be willing to take a stab at a better fix. > > Awesome! That would be very welcome. It is quite important for > better-than-IDE performance with Windows guests. > > > Is there any documentation about the lsi microcode engine anywhere? > > http://www.lsi.com/files/docs/techdocs/storage_stand_prod/SCSIControllers/56_3.pdf http://www.lsi.com/files/docs/techdocs/storage_stand_prod/SCSIControllers/53c896_3.pdf -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
On Tue, Jul 29, 2008 at 03:00:06PM -0700, Roland Dreier wrote: > > Known problem: > > http://www.nabble.com/LSI:-avoid-infinite-loops-p17116605.html > > > Windows driver has scripts code which busy loops on main memory. Since > > that executes in vcpu context, the cpu won't ever get a chance to change > > the variable which the SCSI emulation is looping at. > > Thanks Marcelo (and Alberto) for pointing me at this. > > > The proposed hack, however, is half-assed (see Paul Brook's comments on > > that thread). > > I'd be willing to take a stab at a better fix. Awesome! That would be very welcome. It is quite important for better-than-IDE performance with Windows guests. > Is there any documentation about the lsi microcode engine anywhere? http://www.lsi.com/files/docs/techdocs/storage_stand_prod/SCSIControllers/56_3.pdf > Would the right fix to be to detect the busy loop on CPU memory and > return from lsi_execute_script() in that case? Detect the busy loop, interrupt script execution but guaranteeing that it will continue (by starting a timer to restart execution some time in the future, for example). The tricky part is that in between, SCRIPTS execution could have been restarted by the guest via PIO/MMIO, or by an I/O completion event, so proper synchronization is needed. The hack I did relied on the driver to restart execution by Signal Process command (SIGP), but its possible that such command would never be sent (as Paul Brook mentions in the thread). > BTW I tried using if=ide to install Windows XP and got a blue screen > during the installer. What are people doing to run XP in a kvm guest? Are you using a recent version of kvm-userspace/kernel modules? Please save the blue screen and mail it to the list or fill a bug. Thanks -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
> Known problem: > http://www.nabble.com/LSI:-avoid-infinite-loops-p17116605.html > Windows driver has scripts code which busy loops on main memory. Since > that executes in vcpu context, the cpu won't ever get a chance to change > the variable which the SCSI emulation is looping at. Thanks Marcelo (and Alberto) for pointing me at this. > The proposed hack, however, is half-assed (see Paul Brook's comments on > that thread). I'd be willing to take a stab at a better fix. Is there any documentation about the lsi microcode engine anywhere? Would the right fix to be to detect the busy loop on CPU memory and return from lsi_execute_script() in that case? BTW I tried using if=ide to install Windows XP and got a blue screen during the installer. What are people doing to run XP in a kvm guest? - R. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
On Tue, Jul 29, 2008 at 12:39:53PM -0700, Roland Dreier wrote: > I built with debugging symbols, and this seems to be an issue with SCSI > disk emulation. The traceback is: > > #0 0x7fc086d7dd10 in memcpy () from /lib/libc.so.6 > #1 0x004a319b in cpu_physical_memory_rw (addr=108661608, > buf=0x7fff904ca190 "\224['\206\210\030z\006I�A", len=4, is_write=0) > at /users/rdreier/kvm-deb.git/qemu/exec.c:2847 > #2 0x0041f0c2 in lsi_execute_script (s=0x2ef7a30) at ../cpu-all.h:924 > #3 0x0049bd91 in qcow_aio_read_cb (opaque=0x3018d70, ret=0) at > block-qcow2.c:840 > #4 0x0041cba0 in qemu_aio_poll () at > /users/rdreier/kvm-deb.git/qemu/block-raw-posix.c:513 > #5 0x0040b38a in main_loop_wait (timeout=) > at /users/rdreier/kvm-deb.git/qemu/vl.c: > #6 0x004f607a in kvm_main_loop () at > /users/rdreier/kvm-deb.git/qemu/qemu-kvm.c:587 > #7 0x00412b46 in main (argc=, > argv=0x7fff904cb0c8) > at /users/rdreier/kvm-deb.git/qemu/vl.c:7811 > > and no progress ever seems to be made (the same address is read over and > over) > > I'm trying again with IDE instead of SCSI disks. But I would like to > help debug the SCSI emulation... will look at it further later, and I'm > happy to provide any info someone else could use. Hi Roland, Known problem: http://www.nabble.com/LSI:-avoid-infinite-loops-p17116605.html Windows driver has scripts code which busy loops on main memory. Since that executes in vcpu context, the cpu won't ever get a chance to change the variable which the SCSI emulation is looping at. The proposed hack, however, is half-assed (see Paul Brook's comments on that thread). -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
On Tuesday 29 July 2008 01:39:53 pm you wrote: > I built with debugging symbols, and this seems to be an issue with SCSI > disk emulation. The problem might be related to this bug report: http://sourceforge.net/tracker/index.php?func=detail&aid=1895893&group_id=180599&atid=893831 Marcelo Tosatti worked hard on getting the bug fixed, but the patch was rejected by the Qemu team because it was not a "proper" fix. Marcelo has been trying to figure out what a proper fix should look like and rework the patch. I don't know what Marcelo's progress has been on the issue. The last working patches Marcelo and others put out which fixes the lock-ups can be found here: http://slim.mypals.org/slim/files/kvm/kvm-64-scsi.patch http://slim.mypals.org/slim/files/kvm/lsi-busy-loop-3a.patch You may try installing those patches on KVM (they can still be applied to KVM-72) and see if they fix your problems. Hope this helps. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
I built with debugging symbols, and this seems to be an issue with SCSI disk emulation. The traceback is: #0 0x7fc086d7dd10 in memcpy () from /lib/libc.so.6 #1 0x004a319b in cpu_physical_memory_rw (addr=108661608, buf=0x7fff904ca190 "\224['\206\210\030z\006I�A", len=4, is_write=0) at /users/rdreier/kvm-deb.git/qemu/exec.c:2847 #2 0x0041f0c2 in lsi_execute_script (s=0x2ef7a30) at ../cpu-all.h:924 #3 0x0049bd91 in qcow_aio_read_cb (opaque=0x3018d70, ret=0) at block-qcow2.c:840 #4 0x0041cba0 in qemu_aio_poll () at /users/rdreier/kvm-deb.git/qemu/block-raw-posix.c:513 #5 0x0040b38a in main_loop_wait (timeout=) at /users/rdreier/kvm-deb.git/qemu/vl.c: #6 0x004f607a in kvm_main_loop () at /users/rdreier/kvm-deb.git/qemu/qemu-kvm.c:587 #7 0x00412b46 in main (argc=, argv=0x7fff904cb0c8) at /users/rdreier/kvm-deb.git/qemu/vl.c:7811 and no progress ever seems to be made (the same address is read over and over) I'm trying again with IDE instead of SCSI disks. But I would like to help debug the SCSI emulation... will look at it further later, and I'm happy to provide any info someone else could use. - R. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fresh install of Windows XP hangs early in boot?
> I experienced random hangs during the install (stracing kvm shows no > system calls, and it appears to be spinning at 100% CPU), but eventually > I got an install that ran all the way to completion. However, that > image seems to hang every time shortly after boot starts. I see the > Windows splash screen, the little blue dots move for a few seconds, and > then the guest hangs in the same way -- no system calls, 100% CPU. FWIW, when I ltrace the stuck kvm process, I get an endless string of memcpy(0x7fffb09355f0, "\224\213'\206", 4) (the value changes from run to run, but stays constant within a run) Unfortunately Debian packages don't seem to be built with debugging symbols, so gdb doesn't show a very enlightening backtrace. I'll try to get more info. - R. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
