[Bug 694029] Re: [natty] kvm guests become unstable after a while
This is still a problem on Oneiric. ** Also affects: linux (Ubuntu Natty) Importance: Undecided Status: New ** Also affects: qemu-kvm (Ubuntu Natty) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Oneiric) Importance: Undecided Status: Confirmed ** Also affects: qemu-kvm (Ubuntu Oneiric) Importance: Medium Status: Invalid ** Changed in: qemu-kvm (Ubuntu Natty) Status: New = Invalid ** Changed in: linux (Ubuntu Natty) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/694029/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I'm affected by this bug too. I recently upgraded my laptop from a Dell Latitude D380 running Lucid 64-bit to a Dell Latitude E6520 running Natty 64. I moved all my VMs from the old machine to the new. All the VMs had been working fine for a long time on the old system. The first VM i booted is a 64-bit Lucid machine. When I try compiling the linux kernel on it (2.6.38.something, from git), it fails every time with an error like this: gcc -Wp,-MD,drivers/firewire/.sbp2.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/4.4.3/include -I/home/seb/uvc/uvcvideo/arch/x86/include -Iinclude -include include/generated/autoconf.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -O2 -m64 -mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args -fstack-protector -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -Wframe-larger-than=1024 -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -pg -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -DMODULE -DKBUILD_STR(s)=#s -DKBUILD_BASENAME=KBUILD_STR(sbp2) -DKBUILD_MODNAME=KBUILD_STR(firewire_sbp2) -c -o drivers/firewire/.tmp_sbp2.o drivers/firewire/sbp2.c In file included from include/linux/mm.h:250, from include/linux/pagemap.h:7, from include/linux/blkdev.h:12, from drivers/firewire/sbp2.c:31: include/linux/page-flags.h: In function ‘PageOwnerPriv1’: include/linux/page-flags.h:225: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See file:///usr/share/doc/gcc-4.4/README.Bugs for instructions. make[2]: *** [drivers/firewire/sbp2.o] Error 1 make[1]: *** [drivers/firewire] Error 2 make: *** [drivers] Error 2 If I run make again, it compiles that file fine and segfaults on some other file. The host machine is totally stable, no problems at all. The host machine has plenty of disk free on / and /home (where the VMs live). / and /home are both ext4, though I think that's irrelevant. Please let me know if you want me to run any experiments... -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Serge Hallyn wrote in #15: So far, having two vm's (built by vmbuilder) doing apt-getinstall ubuntu-desktop, what I got was apt-cacher-ng on the host disappearing (!). In my experience, apt-cacher-ng is a flaky crock that crashes all the time. I'd guess it's not related to this bug. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I think Jamie Strandboge is on to something in comment #18 (even though Kees Cook reports something contradictory in #28). I have a very similar wifi chipset, and if i disable wifi the problem appears to be gone. At least my VM successfully compiled a whole kernel, which it's never done with wifi on. I'll attach my system information from apport. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: amd64 ArecordDevices: List of CAPTURE Hardware Devices card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: seb1579 F pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xe2e6 irq 47' Mixer name : 'Intel CougarPoint HDMI' Components : 'HDA:111d76e7,10280494,00100102 HDA:80862805,80860101,0010' Controls : 27 Simple ctrls : 13 DistroRelease: Ubuntu 11.04 HibernationDevice: RESUME=UUID=4dce84f4-fd2f-4dd4-b0be-46a9f45b1083 InstallationMedia: Ubuntu 11.04 Natty Narwhal - Release amd64 (20110427.1) MachineType: Dell Inc. Latitude E6520 Package: linux (not installed) ProcEnviron: LANGUAGE=en_US:en PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=c0882da2-2906-45ee-946f-28fac848f4ef ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2 RelatedPackageVersions: linux-restricted-modules-2.6.38-8-generic N/A linux-backports-modules-2.6.38-8-generic N/A linux-firmware1.52 Tags: natty running-unity Uname: Linux 2.6.38-8-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare dmi.bios.date: 04/13/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A02 dmi.board.name: 0NVF5K dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA02:bd04/13/2011:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0NVF5K:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E6520 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. ** Tags added: apport-collected -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
model name : Intel(R) Core(TM)2 Quad CPUQ6600 @ 2.40GHz -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I have no wireless on my system, and I just saw this in a VM I started. ** Changed in: linux (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
@Kees, what sort of system do you have? I was actually wanting to ask Jamie to do something like 10 or 20 parallel jobs doing wget, tar xvf, and diff -nrup linux-2.6.37.tar.gz, wgetting from a local mirror and looking for differences or segfaults. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
FYI, I double checked maverick kernel on wireless and it is solid. The latest natty kernel (2.6.38-4.31 using wireless) still shows the bug. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
** Changed in: linux (Ubuntu) Assignee: Serge Hallyn (serge-hallyn) = (unassigned) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Looking through the changelog for the wireless driver (assuming this is drivers/net/wireless/iwlwifi/iwl-agn and friends) didn't seem helpful. At this point I'm afraid the most likely path to figuring this out would be to take the upstream kernel, reproduce it on there, and then bisect from 2.6.35 to git head to find the offensive commit. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
** Changed in: qemu-kvm (Ubuntu) Status: Confirmed = Invalid ** Changed in: linux (Ubuntu) Assignee: (unassigned) = Serge Hallyn (serge-hallyn) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I tried to reproduce this on a similar platform as Jamie, but could not, at least in my initial testing. I'm running two Natty desktop live ISOs: kvm -m 1024 -smp 4 -cdrom /home/kirkland/.cache/testdrive/iso/ubuntu_natty-desktop-amd64.iso -drive file=/home/kirkland/.cache/testdrive/img/testdrive-disk-suoUtC.img,if=virtio,cache=writeback,index=0,boot=on -usb -usbdevice tablet -net nic,model=virtio -net user -soundhw es1370 -vga cirrus The backing disk is on an ext4 filesystem (a symlink busts it out of my encrypted home). I'm on an x201 with an i7 processor, and Centrino Ultimate-N 6300 wireless. Kernel is: Linux x201 2.6.38-3-generic #30-Ubuntu SMP Thu Feb 10 00:33:26 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
So after clearing some space and running the identical test I did in comment #19 I had no errors after 64 runs. So without ecryptfs and with wired networking it seems ok. I am going to run the same test but with wireless instead of wired and see what happens. ** Attachment removed: kern.oops https://bugs.launchpad.net/ubuntu/+source/linux/+bug/694029/+attachment/1826451/+files/kern.oops -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Ok, after one run with ext3, plenty of room, no ecryptfs and using wireless, I have the instability. I do not have any kernel messages related to this, and ifconfig shows no errors. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
So at this point possible culprits seem to include: ext3, aufs, and the kvm_intel module (and your hard drive)? Do you have space in which to try on an xfs filesystem? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I still don't think it is the hard drive because a) it is a pretty new intel SSD drive (less than one year), b) I am not getting any other errors outside of kvm (fscks are clean, not file corruption, nothing in kern.log) and c) rebooting into the maverick kernel does not exhibit this problem. aufs should be ruled out based on the kernel team's evaluation in bug #621195, which in summary states that on natty, the aufs 'issue' was purely cosmetic. As for xfs, unfortunately, no, but this prompted to look at how much space I have, and I think the OOPS yesterday may have to do with the fact that I could have hit 95% of my disk space on that test run (which would explain why that is the first time I saw a host error). I've freed up some space and I am retesting now and will report back. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Hi Serge, Yes I am still having this problem. I have not tried to reproduce on another machine because I don't have a natty installation that can do kvm anywhere else. I have not yet tried outside of ecryptfs, but will try to do that today. I can say this though: I am using the 2.6.38-1.28-generic kernel and am still seeing it. Also, I hadn't seen it for a while but have been connected via wired ethernet. I then was connected to wireless and saw it. That might be a fluke, but I am starting to think I see it more often when using wireless (weird). -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Ok, I tried this without ecryptfs on an ext3 partition and still got the errors by running a modified script to use only 2 maverick VMs, one amd64 and one i386. Interestingly, this time I got a kernel oops on the host (which I never had before) after 17 runs (I had many guest errors all along the way). Attached is that kernel oops. ** Attachment added: kern.oops https://bugs.launchpad.net/ubuntu/+source/linux/+bug/694029/+attachment/1826451/+files/kern.oops -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
And here is an updated dmesg with the 2.6.38-1.28-generic kernel that oopsed. ** Attachment added: 2.6.38-1.28-generic.dmesg https://bugs.launchpad.net/ubuntu/+source/linux/+bug/694029/+attachment/1826452/+files/2.6.38-1.28-generic.dmesg -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Hi Jamie, are you still having this problem? Have you been able to reproduce on any other machine, and/or without ecryptfs backing store? I have yet to reproduce it, but will attempt to reproduce in an entirely new environment this afternoon if you are still having this problem. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I might also mention that in my testing in comment #12, one was a i386 guest and one amd64. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
So far, having two vm's (built by vmbuilder) doing apt-getinstall ubuntu-desktop, what I got was apt-cacher-ng on the host disappearing (!). -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Installing 0.12.5+noroms-0ubuntu7, I rebooted and ran my script for 37 runs (~14 hours) and received no Segmentation faults or other weird dpkg errors. This is with the natty kernel. While I find it odd that 0.12.5 with the natty kernel is ok, 0.13 with the natty kernel is not, and either with the maverick kernel seems ok, at this point it seems that it is indeed an issue with qemu-kvm. ** Changed in: qemu-kvm (Ubuntu) Status: Incomplete = New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Marking qemu-kvm task as Confirmed since it is repeatable. ** Changed in: qemu-kvm (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Well, I just had a segmentation fault and other weird behavior in a maverick guest with a host with 0.12.5+noroms-0ubuntu7 and the natty kernel. Seems the combination of 0.13 and the natty kernel is the worst, and that the maverick kernel is still ok. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Meh, strike that last comment. I had tracebacks due to bug #621195 in my last dmesg so the kernel might have been in a weird state when the guest got the segfault. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Ok, no aufs kernel tracebacks (ie bug #621195) and the guests are flaky. What is triggering it is a maverick dist-upgrade in one guest, and an 'apt-get install ubuntu-desktop' in another maverick guest, that only has ubuntu-minimal installed. I will try disabling ksm. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Disabling ksm by adjusting /etc/default/qemu-kvm to have KSM_ENABLED=0 did not help. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Based on the comments so far, marking Incomplete, as per the Ubuntu Server triage process. Thanks. ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided = Medium ** Changed in: qemu-kvm (Ubuntu) Status: New = Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I thought I tested this with 0.12.5, but will try again. This bug (so far) only happens on my primary system, and testing it sometimes requires significant time. I will try against 0.12.5 later today. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
** Tags added: regression-release ** Tags removed: regression-update -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
I wonder whether it could be related to http://www.spinics.net/lists/kvm/msg47235.html -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
More info. Tried this again this morning and it happened on the first run of the script, with the chill mat on and the temperature reasonable. I don't think it is temperature related. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Thanks for posting this bug, Jamie. Given your two hunches, could you try to reproduce with ksm disabled, and also with non-virtio disks? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
** Also affects: kvm (Ubuntu) Importance: Undecided Status: New ** Package changed: kvm (Ubuntu) = qemu-kvm (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/694029 Title: [natty] kvm guests become unstable after a while -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 694029] Re: [natty] kvm guests become unstable after a while
Added qemu-kvm task as this is only with kvm quests. ** Description changed: After upgrading to natty's kernel I noticed that my VMs would sometimes become highly unstable, with random guest applications segfaulting and crashing in weird ways. This seems to be more pronounced when running more than one VM at a time. This does not seem to be a hardware issue-- the host is a 6 month old laptop and I ran memtest86 for 12 hours with 18 successful completions and no errors. There is no host instability or messages in dmesg that I could see that would indicate a host problem. Downgrading to the maverick kernel fixes this problem. I have a script that will launch 10 VMs and run some commands: #!/bin/sh count=0 while /bin/true ; do - count=$(( $count + 1 )) - echo RUN $count - vm-stop -f -p sec - sleep 3 - vm-start -s -v -p sec - sleep 15 - vm-cmd -c -r -p sec apt-get update - vm-cmd -c -r -p sec apt-get -y --force-yes dist-upgrade + count=$(( $count + 1 )) + echo RUN $count + vm-stop -f -p sec + sleep 3 + vm-start -s -v -p sec + sleep 15 + vm-cmd -c -r -p sec apt-get update + vm-cmd -c -r -p sec apt-get -y --force-yes dist-upgrade - vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser - vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* + vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser + vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* - vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser - vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* + vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser + vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* - vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser - vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* + vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser + vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* - vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser - vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* + vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser + vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* - vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser - vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* + vm-cmd -c -r -p sec apt-get -y --force-yes install chromium-browser + vm-cmd -c -r -p sec apt-get -y --force-yes remove --purge chromium-browser* done 'vm-start' starts 10 VMs via libvirt with snapshotted qcow2 disks, and vm-stop kills them off, discarding the snapshot. 'vm-cmd' will ssh into each machine and run the command for each machine in sequence. The VMs themselves are all pristine and are resnapshotted on each loop iteration. The point of this explanation is to illustrate that while the VMs all start in the same state, they fail differently or sometimes not at all. I am able to reproduce guest instability within 4-5 iterations of this script on a natty kernel. With the maverick kernel it ran for 18 times with no errors (around 8 hours). For example, with the above, I saw a maverick/i386 guest fail once with: dpkg: parse error, in file '/var/lib/dpkg/status' near line 5914 package 'libtelepathy-glib0': - 'Depends' field, reference to 'libglib2.0-0': error in version: version string is empty + 'Depends' field, reference to 'libglib2.0-0': error in version: version string is empty Another time the maverick/i386 failed with: Processing triggers for man-db ... dpkg: error processing man-db (--unpack): - subprocess installed post-installation script killed by signal (Segmentation fault) + subprocess installed post-installation script killed by signal (Segmentation fault) Errors were encountered while processing: - man-db + man-db A lucid/i386 guest failed another time with: Processing triggers for python-gmenu ... Rebuilding /usr/share/applications/desktop.en_US.utf8.cache... Segmentation fault dpkg: error processing python-gmenu (--purge): - subprocess installed post-installation script returned error exit status 139 + subprocess installed post-installation script returned error exit status 139 Processing triggers for man-db ... Errors were encountered while processing: - python-gmenu + python-gmenu There are many other failures On my laptop I have an i7 with two cores and 4 hyperthreads per core (this is the default configuration for this machine from the factory and the configuration used to report this bug). I am able to 'disable' hyperthreads in the BIOS, and if I do, I end up with 2
