https://bugzilla.kernel.org/show_bug.cgi?id=27052
Summary: Module KVM : unable to handle kernel NULL pointer
dereference at
Product: Virtualization
Version: unspecified
Kernel Version: 2.6.37
Platform: All
OS/Version:
https://bugzilla.kernel.org/show_bug.cgi?id=27052
--- Comment #1 from prochazka prochazka.nico...@gmail.com 2011-01-19
11:05:05 ---
cpuinfo and cmdline :
/usr/local/bin/qemu -name R005 -vga std -net
tap,vlan=0,name=interne,ifname=vmtap5 -net
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--- Comment #2 from prochazka prochazka.nico...@gmail.com 2011-01-19
11:26:16 ---
it seems without hugepage, i can not reproduce this bugs
( -mem-prealloc -mem-path /hugepages )
/usr/local/bin/qemu -name R005 -vga std -net
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--- Comment #3 from prochazka prochazka.nico...@gmail.com 2011-01-19
11:34:21 ---
Sorry,
witout hugepage, bug is alway here :
rmap_remove: 8802455bfff8 0-BUG
[ cut here ]
kernel BUG at
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Marcelo Tosatti mtosa...@redhat.com changed:
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CC||mtosa...@redhat.com
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--- Comment #5 from Marcelo Tosatti mtosa...@redhat.com 2011-01-20 17:30:38
---
Created an attachment (id=44522)
-- (https://bugzilla.kernel.org/attachment.cgi?id=44522)
KVM: MMU: fix rmap_remove on non present sptes
KVM: MMU: fix
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--- Comment #6 from prochazka prochazka.nico...@gmail.com 2011-01-20
19:45:49 ---
hello,
I do not understand, patch seems to be already apply on 2.6.37 kernel tree,
and my test are based on this release.
NP.
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--- Comment #7 from Marcelo Tosatti mtosa...@redhat.com 2011-01-21 03:27:36
---
Nicolas,
My bad. Can you please try the following patch.
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--- Comment #8 from Marcelo Tosatti mtosa...@redhat.com 2011-01-21 03:29:36
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Created an attachment (id=44552)
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update sp-gfns on pte update path
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--- Comment #9 from prochazka prochazka.nico...@gmail.com 2011-01-25
08:49:48 ---
seems to be closed,
but our tests are not exhaustive
Regards,
NP.
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--- Comment #10 from Marcelo Tosatti mtosa...@redhat.com 2011-01-25 13:09:07
---
Nicolas,
It would be good if you can test with hugepages enabled again.
Thanks for the detailed report.
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--- Comment #12 from Marcelo Tosatti mtosa...@redhat.com 2011-01-25 13:55:05
---
It gets inconsistent if mmu_set_spte updates an already present spte with a
different gfn. For example:
- unsync page spte N gfn A
- guest updates gpte that
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--- Comment #13 from Marcelo Tosatti mtosa...@redhat.com 2011-01-25 17:07:58
---
Nicolas,
Can you please back out the first patch and apply this debug one instead?
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--- Comment #14 from Marcelo Tosatti mtosa...@redhat.com 2011-01-25 17:08:42
---
Created an attachment (id=45162)
-- (https://bugzilla.kernel.org/attachment.cgi?id=45162)
debug rmap remove
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--- Comment #15 from prochazka prochazka.nico...@gmail.com 2011-01-25
17:29:00 ---
previous test is with hugepages.
I try to test but i can reproduce only to one server, and this server is not
mine.
Regards,
Nicolas.
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--- Comment #16 from prochazka prochazka.nico...@gmail.com 2011-01-28
06:58:03 ---
Et voilà :
Jan 28 01:28:18 bergson25412 rmap_remove: 88011ce3fff8 1-BUG
Jan 28 01:28:18 bergson25412 [ cut here ]
Jan 28
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--- Comment #17 from Marcelo Tosatti mtosa...@redhat.com 2011-02-04 21:11:55
---
Nicolas,
Please try kvm-debug-spte-gfn.patch on top of plain 2.6.37 (without the
previous two patches).
Thanks
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is
https://bugzilla.kernel.org/show_bug.cgi?id=28402
Summary: MacOSX guest has SMP problem without -kvm-irqchip
option
Product: Virtualization
Version: unspecified
Kernel Version: 2.6.38-rc3
Platform: All
OS/Version: Linux
https://bugzilla.kernel.org/show_bug.cgi?id=28412
Summary: MacOSX guest has Ethernet card problem without
-kvm-irqchip option
Product: Virtualization
Version: unspecified
Kernel Version: 2.6.38-rc3
Platform: All
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--- Comment #19 from prochazka prochazka.nico...@gmail.com 2011-02-08
09:46:04 ---
An other log without patch #18 / #17 ( as #16 )
I try with #18
Feb 8 00:16:37 bergson18494 rmap_remove: gfn=0 index=511 level=1
Feb 8 00:16:37
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--- Comment #20 from prochazka prochazka.nico...@gmail.com 2011-02-08
10:50:13 ---
gfn=f001 idx=511 lvl=1 d=0 spte=0
sp-gfns[511] = f001
sp-gfns[511] = f001
sp-gfns[511] = f001
sp-gfns[510] =
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--- Comment #21 from prochazka prochazka.nico...@gmail.com 2011-02-10
08:25:35 ---
Dear all,
Do you have more information about this bug submit ?
Regards,
Nicolas Prochazka.
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--- Comment #22 from Marcelo Tosatti mtosa...@redhat.com 2011-02-10 13:36:25
---
Problem description:
Present spte is dropped while syncing 32-bit level 1 shadow page. But
sp-gfns[index] contains uninitialized value (0 or f001),
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--- Comment #23 from Marcelo Tosatti mtosa...@redhat.com 2011-02-10 13:50:08
---
Nicolas,
On comment #2 you mention the bug could not be reproduced, but in comment #3
you report it without hugepages enabled. So, were you using hugepages or
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--- Comment #24 from prochazka prochazka.nico...@gmail.com 2011-02-10
14:14:25 ---
I can now reproduce it under this circonstance on different server
- Windows XP guest SP2 : guest OS seems to be important, other XP sp3 works
fine
-
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--- Comment #25 from prochazka prochazka.nico...@gmail.com 2011-02-10
14:16:51 ---
cmdline
/usr/local/bin/qemu -name Soins_003 -vga std -net
tap,vlan=0,name=interne,ifname=vmtap5 -net
nic,vlan=0,macaddr=ac:de:48:1d:e8:2c,model=e1000 -cpu
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--- Comment #26 from Marcelo Tosatti mtosa...@redhat.com 2011-02-10 16:57:17
---
Nicolas,
New debug patch attached. Please try it on top of clean 2.6.37.
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--- Comment #27 from Marcelo Tosatti mtosa...@redhat.com 2011-02-10 16:57:59
---
Created an attachment (id=47152)
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kvm-debug-spte-gfn-2.patch
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--- Comment #28 from prochazka prochazka.nico...@gmail.com 2011-02-11
15:43:22 ---
Marcelo,
debug info
Regards,
Nicolas
general protection fault: [#1] SMP
last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map
CPU
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--- Comment #29 from Marcelo Tosatti mtosa...@redhat.com 2011-02-11 21:33:17
---
gfn=dead01ff idx=511 lvl=1 d=0 spte=0 old_spte=f001
The last spte is 0xf001, it should be 0xf001 (two bytes at
end of pgtable
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--- Comment #30 from prochazka prochazka.nico...@gmail.com 2011-02-12
17:06:02 ---
hi marcelo,
I enable CONFIG_SLUB_DEBUG=y and boot with slub_debug=FZPU,
but now I cannot reproduce bug
I have a lot of : BUG kmalloc-1024: Object padding
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--- Comment #31 from Avi Kivity a...@redhat.com 2011-02-13 16:11:53 ---
What happens if you disable (rmmod) all netfilter modules?
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--- Comment #32 from prochazka prochazka.nico...@gmail.com 2011-02-13
16:38:03 ---
Can you explain your idea ?
In fact, we are using DNAT and SNAT rules to redirect and access VM Guest ( VNC
and RDP ) . And to reproduce bug, connection seems
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--- Comment #33 from Marcelo Tosatti mtosa...@redhat.com 2011-02-13 19:39:09
---
So something else appears to be corrupting memory (i verified and its unlikely
to be KVM). Perhaps go back to 2.6.36.3 in an attempt to isolate the issue?
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--- Comment #34 from prochazka prochazka.nico...@gmail.com 2011-02-13
20:13:53 ---
When I said it worked with 2.6.36 , in fact, I not used brigde and netfilter
with this test ,
so now as avi says, perhaps it's more brctl or netfilter bug
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--- Comment #35 from Avi Kivity a...@redhat.com 2011-02-14 14:52:24 ---
Even if it isn't a kvm bug, it needs to be fixed.
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--- Comment #36 from prochazka prochazka.nico...@gmail.com 2011-02-14
15:50:02 ---
I agree with you but i must resend this problem to kernel module bridge or
netfilter, I must isolate the issue .
Regards,
Nicolas Prochazka.
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--- Comment #37 from prochazka prochazka.nico...@gmail.com 2011-02-14
15:51:14 ---
Sorry I do not read your post to netfilter devel list.
Nicolas
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--- Comment #38 from Avi Kivity a...@redhat.com 2011-02-14 16:02:06 ---
Please revert ca44ac386181ba7 and try again (with netfilter enabled).
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Summary: [VT-d] VT-d device passthrough fail to guest
Product: Virtualization
Version: unspecified
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
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https://bugzilla.kernel.org/show_bug.cgi?id=29382
Summary: Panic: Unable to handle kernel paging request
Product: Virtualization
Version: unspecified
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
https://bugzilla.kernel.org/show_bug.cgi?id=29382
--- Comment #1 from Seb Lu se...@seblu.net 2011-02-18 14:59:41 ---
Created an attachment (id=48312)
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screeb dump
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--- Comment #2 from Seb Lu se...@seblu.net 2011-02-18 15:00:10 ---
Created an attachment (id=48322)
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screen dump
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--- Comment #3 from Seb Lu se...@seblu.net 2011-02-18 15:00:46 ---
Created an attachment (id=48332)
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screen dump
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--- Comment #4 from Seb Lu se...@seblu.net 2011-02-19 11:16:42 ---
new crash today. I will try with a 2.6.37
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--- Comment #5 from Seb Lu se...@seblu.net 2011-02-19 11:17:26 ---
Created an attachment (id=48412)
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crash 19/02/2011
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Summary: page allocation failure when using jumbo frames with
kvm guests
Product: Virtualization
Version: unspecified
Kernel Version: 2.6.35
Platform: All
OS/Version: Linux
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--- Comment #2 from Peter Merhaut kernelbug_...@russenmafia.at 2011-02-28
11:47:51 ---
uh i should add that the file rtorrent hashes is on a nfs filesystem. so this
generates a lot of network traffic. between the host (which also serves as
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Summary: Debian 4 fails to boot in KVM
Product: Virtualization
Version: unspecified
Kernel Version: 2.6.38-rc7
Platform: All
OS/Version: Linux
Tree: Mainline
Status:
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Florian Mickler flor...@mickler.org changed:
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Summary: Clarify compilation options for the host or for the
guest
Product: Virtualization
Version: unspecified
Platform: All
OS/Version: Linux
Tree: Mainline
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--- Comment #8 from Seb Lu se...@seblu.net 2011-03-29 10:32:23 ---
On Sun, Feb 20, 2011 at 11:48 AM, bugzilla-dae...@bugzilla.kernel.org wrote:
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Avi Kivity a...@redhat.com changed:
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--- Comment #9 from Seb Lu se...@seblu.net 2011-04-06 14:57:15 ---
do you need more information?
I currently run test with 2.6.37 and 2.6.38, i don't see this problem again.
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--- Comment #5 from Avi Kivity a...@redhat.com 2010-12-26 10:24:20 ---
Still cannot reproduce.
What's the exact Windows version you use?
What is your processor?
What is the qemu command line?
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--- Comment #6 from Avi Kivity a...@redhat.com 2010-12-26 10:41:32 ---
Also, do you have ksm enabled? What happens if you disable it?
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https://bugzilla.kernel.org/show_bug.cgi?id=25942
Summary: host Debian squeeze 2.6.36.2 crash while working with
two guests one debian lenny 2.6.26.2 and windows xp
sp3
Product: Virtualization
Version: unspecified
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Summary: qemu stop responding if using kvm with usb passthru
Product: Virtualization
Version: unspecified
Kernel Version: 2.6.37
Platform: All
OS/Version: Linux
Tree: Mainline
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--- Comment #18 from Ian Pilcher arequip...@gmail.com 2012-11-17 22:10:45 ---
(In reply to comment #11)
A patch referencing this bug report has been merged in Linux v3.5-rc1:
commit d8368af8b46b904def42a0f341d2f4f29001fa77
Author: Avi
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--- Comment #19 from Avi Kivity a...@redhat.com 2012-11-18 14:15:41 ---
On 11/18/2012 12:10 AM, bugzilla-dae...@bugzilla.kernel.org wrote:
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--- Comment #18 from Ian Pilcher
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--- Comment #20 from Ian Pilcher arequip...@gmail.com 2012-11-18 17:06:36 ---
(In reply to comment #19)
The physical host. If you want to run a hypervisor in L2, you need to
apply it to L1 as well.
OK. If I'm parsing that correctly, it
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Summary: The smp_affinity cannot work correctly when PCI
passthrough device using msi/msi-x with KVM
Product: Virtualization
Version: unspecified
Kernel Version: 3.7-rc6
Platform:
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liyi yiliker...@gmail.com changed:
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Summary|The smp_affinity cannot |The smp_affinity cannot
https://bugzilla.kernel.org/show_bug.cgi?id=50921
Summary: kvm hangs booting Windows 2000
Product: Virtualization
Version: unspecified
Kernel Version: 3.6.x
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
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--- Comment #2 from Gleb g...@redhat.com 2012-11-24 08:22:46 ---
And if you have time it would be very helpful to bisect it.
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--- Comment #3 from Lucio Crusca lu...@sulweb.org 2012-11-24 08:52:25 ---
What should I do in order to bisect it?
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--- Comment #4 from Gleb g...@redhat.com 2012-11-24 11:25:26 ---
http://www.kernel.org/pub/software/scm/git/docs/git-bisect.html
http://webchick.net/node/99
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--- Comment #5 from Lucio Crusca lu...@sulweb.org 2012-11-24 13:44:16 ---
Here the first tests results:
vbox modules do not make a difference (tried rmmod vboxpci vboxnetadp
vboxnetflt vboxdrv and then kvm ...).
The trace.dat is about 60M,
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--- Comment #6 from Gleb g...@redhat.com 2012-11-24 14:05:24 ---
Try 3.5.0 kernel, it should work. Preemptible low latency desktop config should
not matter. I'll find the place to put the trace.dat file and let you know.
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--- Comment #7 from Lucio Crusca lu...@sulweb.org 2012-11-24 14:57:07 ---
I'm now compiling 3.5.0.
About the guest image, it's a 2.1GB qcow2 file. No hope to upload it anywhere
with my internet connection. The only way I see to let you have
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--- Comment #8 from Lucio Crusca lu...@sulweb.org 2012-11-24 18:50:38 ---
Tried 3.5.0: as soon as the guest window shows up (before SeaBIOS messages) it
closes and kvm segfaults...
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--- Comment #9 from Lucio Crusca lu...@sulweb.org 2012-11-24 19:09:13 ---
Now I'm quite sure kvm works at least for someone (many) in 3.5.0. That leads
me to believe all this is specific to my computer or my kernel configuration.
Could the
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--- Comment #10 from Gleb g...@redhat.com 2012-11-24 19:10:08 ---
Hmm, this is something different. Which version of qemu and can you get a stack
trace?
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--- Comment #11 from Gleb g...@redhat.com 2012-11-24 19:12:58 ---
32bit host kernels are tested less than 64bit, but your original problem with
wind2000 does not look to be 32bit related. Looks like instruction emulation
problem.
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https://bugzilla.kernel.org/show_bug.cgi?id=50921
Alan a...@lxorguk.ukuu.org.uk changed:
What|Removed |Added
CC||a...@lxorguk.ukuu.org.uk
https://bugzilla.kernel.org/show_bug.cgi?id=50921
--- Comment #13 from Lucio Crusca lu...@sulweb.org 2012-11-26 13:13:56 ---
@Alan: see comment #5, since then I've always tested with and without vbox
modules.
@Gleb: can't run on 3.5.0 right now, I'll take the stack trace ASAP.
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https://bugzilla.kernel.org/show_bug.cgi?id=50891
Alex Williamson alex.william...@redhat.com changed:
What|Removed |Added
CC|
https://bugzilla.kernel.org/show_bug.cgi?id=50921
--- Comment #14 from Anonymous Emailer anonym...@kernel-bugs.osdl.org
2012-11-26 20:10:11 ---
Reply-To: xiaoguangr...@linux.vnet.ibm.com
On 11/24/2012 09:44 PM, bugzilla-dae...@bugzilla.kernel.org wrote:
https://bugzilla.kernel.org/show_bug.cgi?id=50921
--- Comment #15 from Anonymous Emailer anonym...@kernel-bugs.osdl.org
2012-11-26 20:29:28 ---
Reply-To: xiaoguangr...@linux.vnet.ibm.com
Sorry, forgot to CC Lucio Crusca.
On 11/27/2012 04:09 AM, Xiao Guangrong wrote:
On 11/24/2012 09:44
https://bugzilla.kernel.org/show_bug.cgi?id=50921
--- Comment #16 from Lucio Crusca lu...@sulweb.org 2012-11-26 22:14:15 ---
@xiaoguangrong: YOU ARE THE MAN! 'emulate_invalid_guest_state = 0' did the
trick, now I have win2000 running in a 3.6.7 kvm guest! Thanks.
Still guessing why it works
https://bugzilla.kernel.org/show_bug.cgi?id=50891
--- Comment #2 from liyi yiliker...@gmail.com 2012-11-27 00:57:28 ---
sorry, i am not clearly it.
1:i am sure the device using the MSI-X, the test is failed.
check the attribute, entry-msi_attrib.is_msix is 1.
pls, the qemu kvm version
https://bugzilla.kernel.org/show_bug.cgi?id=50921
--- Comment #17 from Gleb g...@redhat.com 2012-11-27 08:22:15 ---
(In reply to comment #16)
@xiaoguangrong: YOU ARE THE MAN! 'emulate_invalid_guest_state = 0' did the
trick, now I have win2000 running in a 3.6.7 kvm guest! Thanks.
Still
https://bugzilla.kernel.org/show_bug.cgi?id=50891
--- Comment #3 from Alex Williamson alex.william...@redhat.com 2012-11-27
18:13:07 ---
I tested a BCM5716 on 3.7.0-rc7 with both qemu-kvm-1.2.0 and current qemu.git
using pci-assign. MSI-X pinning works exactly as expected. Note that Linux
https://bugzilla.kernel.org/show_bug.cgi?id=50891
--- Comment #4 from liyi yiliker...@gmail.com 2012-11-29 15:38:10 ---
1: i have disable the irqbalance in the host, and the irq affinity on the host
is ok.you can see the 4 step in comment 0.
2: you see in comment 0, we have set irq
https://bugzilla.kernel.org/show_bug.cgi?id=50891
--- Comment #5 from Alex Williamson alex.william...@redhat.com 2012-11-29
16:10:55 ---
(In reply to comment #4)
1: i have disable the irqbalance in the host, and the irq affinity on the host
is ok.you can see the 4 step in comment 0.
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