Is it really fixed? I am running kvm 1:84+dfsg-0ubuntu12.4 on Ubuntu
9.04 and still see this error:
Sep 3 15:43:00 vm-01 kernel: [2395791.060789] kvm[19481]: segfault at 0
ip 00479a20 sp 7fffe4f56690 error 4 in kvm[40+1e1000]
Sep 3 18:00:02 vm-01 kernel: [2404013.508648]
Is it really fixed? I am running kvm 1:84+dfsg-0ubuntu12.4 on Ubuntu
9.04 and still see this error:
Sep 3 15:43:00 vm-01 kernel: [2395791.060789] kvm[19481]: segfault at 0
ip 00479a20 sp 7fffe4f56690 error 4 in kvm[40+1e1000]
Sep 3 18:00:02 vm-01 kernel: [2404013.508648]
This bug was fixed in kvm-84 as published to hardy-backports and
intrepid-backports. If you're suffering from this bug, please try that
package.
:-Dustin
** Changed in: kvm (Ubuntu Hardy)
Milestone: ubuntu-8.04.3 = None
** Changed in: kvm (Ubuntu Intrepid)
Milestone: intrepid-updates =
This bug was fixed in kvm-84 as published to hardy-backports and
intrepid-backports. If you're suffering from this bug, please try that
package.
:-Dustin
** Changed in: kvm (Ubuntu Hardy)
Milestone: ubuntu-8.04.3 = None
** Changed in: kvm (Ubuntu Intrepid)
Milestone: intrepid-updates =
** Branch linked: lp:ubuntu/karmic/kvm
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** Branch linked: lp:ubuntu/jaunty-proposed/kvm
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** Tags added: verification-done
** Tags removed: verification-needed
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This bug was fixed in the package kvm - 1:84+dfsg-0ubuntu12.3
---
kvm (1:84+dfsg-0ubuntu12.3) jaunty-proposed; urgency=low
* Cherry-pick qcow2 corruption patch from upstream git
- Fix-at-least-one-cause-of-qcow2-corruption.-Nolan.patch,
LP: #392295
* Cherry-pick patch
Update:
No crashes on jaunty-proposed, although I have not stressed the box much
yet.
No crashes on RC2 (1:84+dfsg-0ubuntu12.1~rc2ppa3) in 11 days (since
upgrade to RC2), and I *have* stressed the box.
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After migrating to kvm 85+dfsg-4 uptime of freebsd guest is constantly
increasing(15days now). No problems occured in this period.
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Hi, Dustin.
I would like to test the backport of KVM-84 for Hardy Heron server
amd64. As I commented above, I found that a KVM process of a VM with
high rate of I/O terminated with segmentation fault in an installation
of Hardy Heron server amd64 with KVM-62.
Adding the following lines to
I enabled jaunty-proposed on a new jaunty box and upgraded kvm:
$ sudo apt-get install kvm
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
ubuntu-vm-builder hal
So there's quite a list of people on this thread reporting segfault
problems.
Would one of those please test the package in jaunty-proposed?
:-Dustin
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I'm setting up a new jaunty box within the next few days. I will
install the jaunty-proposed version of kvm and report the results.
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Garry-
Could you please test the rc4 package in the PPA? I strongly believe
that it should fix your segfault.
:-Dustin
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I had the very same bug a few days ago with the kvm84 backport for
hardy:
Jul 4 07:54:38 toulouse kernel: [4540400.485118] kvm[23661]:
segfault at 3e9d20a9 eip 080bcbd8 esp bf9a8774 error 4
It was happening after a while under heavy network load with virtio. The
latest version of the package
Okay, I just uploaded kvm_84+dfsg-0ubuntu12.1 to jaunty-proposed.
Please test and give feedback here. If we can get verification of the
fix, then we can see this pushed to jaunty-updates.
Thanks.
:-Dustin
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Uploaded kvm_84+dfsg-0ubuntu12.2_source.changes, which also fixes a
minor Apport reporting bug.
Please test that in proposed and leave feedback.
:-Dustin
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This bug was fixed in the package kvm - 1:84+dfsg-0ubuntu15
---
kvm (1:84+dfsg-0ubuntu15) karmic; urgency=low
* Cherry-pick qcow2 corruption patch from upstream git
- Fix-at-least-one-cause-of-qcow2-corruption.-Nolan.patch
* Cherry-pick dma error handling patch from upstream
Dustin,
rc2 in the PPA (1:84+dfsg-0ubuntu12.1~rc2ppa3) appears to have already
fixed the segfault.
No segfaults in 3 days and I've applied some high disk I/O to the
machine.
I can't test rc4 right away b/c rc2 is on a production machine. Once I
can declare another maintenance window and reboot
Thanks Garry. You are correct about the differences between those two
packages. Thank you for the verification.
:-Dustin
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No problem! Thanks for cherry-picking those fixes and providing us a
more stable kvm package.
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Garry Dolley, you hit another bug. As I understood, the problem is
inside io. When your OS flusches dirty page all read requests are
frozen. If in this time freebsd tries to read from disk via DMA-channel
it fails to do that as kvm cant read from disk. So freebsd thinks that
disk is broken and
Can someone please try to reproduce this with the latest (rc3) packages in:
* https://edge.launchpad.net/~ubuntu-virt/+archive/ppa
I have backported the patch that Anthony suggested. Please let me know
if this solves your problem.
:-Dustin
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exe, OK. Nevertheless, the 1:84+dfsg-0ubuntu12.1~rc2ppa3 package has
been more stable for me on jaunty than 1:84+dfsg-0ubuntu11.
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I'm running jaunty with everything up-to-date.
I was experiencing segfaults similar to those described in this ticket
when disk I/O was high. For example, when dd'ing a raw image file to an
LVM volume, when the image was about 60G, caused several kvm processes
to crash.
I was able to reproduce
Apparently I am having the same problem with KVM-62 in Ubuntu Hardy
Heron server amd64 with kernel 2.6.24-19-server. At the moment it has
happened a single time, but I can confirm that the VM is under heavy IO
load. Even so this it is a _very_ serious problem from the moment that
the VM is a
I saw segfaults with kvm-84.
I have built package from debian unstable. Also I've had to rebuilt libvirt as
old libvirt-bin from karmic doesn't support kvm newer than 84.
Now uptime of my kvm-85 virtual machine is almost 3 days, no problems detected.
Unfortunally I must reboot server soon to
oops, segfaults have returned. I migrated to kvm-85.
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On Mon, Jun 22, 2009 at 3:47 AM, exes...@messir.net wrote:
oops, segfaults have returned. I migrated to kvm-85.
Please clarify... are you seeing the segfaults in kvm-85 or kvm-84?
:-Dustin
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Oh-oh-oh, after a couple of unsleepy nights it seems bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/276476 triggers
this problem. When all tasks are freazed in IO freebsd raises DMA
timeout and then reboots soon.
Anyway I can easy trigger this problem. No solution yet :(((
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kvm
With kvm 1:84+dfsg-0ubuntu12.1~ppa6 after 3 days:
ad0: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=20875903
Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address = 0xc90ecfad
fault code = supervisor read, page not present
instruction
commit 7403b14eeb4670d54497284b110ca3e3be4a99a4
Author: aliguori aligu...@c046a42c-6fe2-441c-8c8c-71466251a162
Date: Sat Mar 28 16:11:25 2009 +
Fix DMA API when handling an immediate error from block layer (Avi Kivity)
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commit c240b9af599d20e06a58090366be682684bd8555
Author: aliguori
I'm beginning to test this. I will post to this topic If it segfaults.
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Installing the update from jaunty-proposed (amd64) has stopped my
virtual machine from segfaulting. Before my XP virtual machine was
segfaulting all the time. It would always segfault during a disk
consistency check when booting up, and if I skipped that check it
wouldn't take all that long before
Ugh, quite intrusive, but I agree that crashing VMs on LTSes are bad. So
please upload this to -propose and give it proper testing.
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On Wed, May 06, 2009 at 09:48:20AM -, Martin Pitt wrote:
Ugh, quite intrusive, but I agree that crashing VMs on LTSes are bad.
This if for Jaunty, so it's not an LTS issue at the moment. However,
we're working on getting kvm-84 into shape to get it into Hardy, and
this bug is a serious
Accepted kvm into jaunty-proposed, the package will build now and be
available in a few hours. Please test and give feedback here. See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed. Thank you in advance!
** Changed in: kvm (Ubuntu Jaunty)
Now, I'm nominating for Hardy and Intrepid. This fix should be included
in the kvm-84 backport that I'm working on.
:-Dustin
** Also affects: kvm (Ubuntu Hardy)
Importance: Undecided
Status: New
** Also affects: kvm (Ubuntu Intrepid)
Importance: Undecided
Status: New
**
I have package in my company PPA (~linux2go) that fixes this. It
includes the following upstream commits:
5f7a4ea7ad2355d17ded90c393627d38d440ab26
1f310e069d8e6c998272839aad0c6127c438c84b
2f615dfb773043e4545319d470e407ea6d4f1ecb
c48260ed4c7824dfda5b604e44af9bce182c43a7
Sorry, Eucalyptus bugbot is my alter ago.
** Also affects: kvm (Ubuntu Jaunty)
Importance: Undecided
Status: New
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Proposed debdiff.
** Attachment added: Patchset from upstream
http://launchpadlibrarian.net/26359722/segfault.diff
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** Changed in: kvm (Ubuntu Jaunty)
Importance: Undecided = High
** Changed in: kvm (Ubuntu Jaunty)
Status: New = Triaged
** Changed in: kvm (Ubuntu Jaunty)
Milestone: None = jaunty-updates
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For those experiencing this problem on kvm-84 on Hardy or Intrepid, I have
uploaded a new package with soren's patch to the PPA.
* https://edge.launchpad.net/~ubuntu-virt/+archive/ppa
If you are able to test that, please leave feedback here.
:-Dustin
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I get a segfault whenever I run a qemu-img convert, or copy a large
file (over 5 GB) as root in a terminal, not to mention have firefox open
and trying to surf at the same time... very annoying.
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Last message on serial console from guest:
===
FreeBSD/i386 (virt002.serv) (ttyd0)
login: ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=194373119
virsh #
===
And then in dmesg:
[736228.331135] kvm[2933]: segfault at 29c ip 00431859 sp
** Bug watch added: SourceForge.net Tracker #2768509
http://sourceforge.net/support/tracker.php?aid=2768509
** Also affects: kvm via
http://sourceforge.net/support/tracker.php?aid=2768509
Importance: Unknown
Status: Unknown
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I hadn't looked at the guest when it crashed. It was just last message
on serial console.
I can't trigger it.Seems it's occurs only once a boot or under heavy io
load. I can't experiment with a server because it's in production
environment. I will make backups soon. If problem in io-subsystem it
I managed to extract this backtrace.
** Attachment added: Backtrace
http://launchpadlibrarian.net/25484804/kvm-backtrace.txt
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It seems the bug is somewhere in the block layer. The segfault is caused
by the IDE DMA callback being called, but the embedded IDEState is NULL.
Lots of stuff has changed in the block layer since kvm-84 came out, so
this might prove tricky to narrow down.
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Soren Hansen, I have same thoughts because last message from guest was
smth like ad0 read dma timeout, retrying
Dustin Kirkland, yes, it's segfaults anyway :(
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exe, did you just happen to be looking at the guest at the time of the
crash or do you have a way to trigger it?
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I get the exact same problem with the kvm-84 backport for Hardy. I've
got a ton of these:
[9257662.920957] kvm[32576]: segfault at 29c rip 431db7 rsp 7fff34552300 error 4
[9326565.509652] kvm[21403]: segfault at 29c rip 431f87 rsp 7fff8f921710 error 4
[9326565.539824] kvm[574]: segfault at 29c
I forgot to mention that I don't use curses. I'm VNC all the way :)
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** Changed in: kvm (Ubuntu)
Importance: Undecided = Medium
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Looks like a problem in curses.
Do you get the segfault if you leave off the -curses option?
:-Dustin
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