I logged it locally, and this is how much data was put out:
root@tctrko1:~# cat /tmp/debug | wc -c
1179958
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Title:
A privsep daemon spawned by
The stack trace is the following:
Dec 01 07:19:38 tctrko1 neutron-linuxbridge-agent[18892]: --
Green Thread--
Dec 01 07:19:38 tctrko1 neutron-linuxbridge-agent[18892]:
/openstack/venvs/neutron-21.2.6/bin/neutron-linuxbridge-agent:8 in
Dec
Unfortunately, I'm running into this issue right now in an environment
that is running `linuxbridge`. I'm going to assume the number of
`VXLAN` interfaces is bubbling up that is causing this issue to occur.
Also, since in linuxbridge, there are `brq` and `VXLAN` interfaces.
I've got around 219
FYI, I was being hit by this and the issue disappeared once I updated
the firmware on those NICs to 14.31.1014. The problematic firmware
version I had was 14.26.1040. Not only did I see those errors, but I
actually saw traffic being dropped.
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This has confirmed to fix our crashes locally, since applying it it has
entirely eliminated all those segfaults.
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Title:
[SRU] ceph 15.2.5
To
This is pretty critical for us, the problem is that we are seeing VMs
crash with the following error:
Oct 24 15:55:19 kvm3 kernel: [1972520.039122] tp_librbd[65017]: segfault at
3f21 ip 7f5ea8796266 sp 7f5e82ffc500 error 4 in
librbd.so.1.12.0[7f5ea85b7000+5a3000]
Oct 25 12:20:24 kvm3
*** This bug is a duplicate of bug 1898200 ***
https://bugs.launchpad.net/bugs/1898200
** This bug has been marked a duplicate of bug 1898200
[SRU] ceph 15.2.5
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Reporting in another crash with the segfault:
[Sun Oct 25 12:19:43 2020] fn-radosclient[59082]: segfault at 14ea9a ip
7facfa108266 sp 7facd17f9470 error 4 in
librbd.so.1.12.0[7facf9f29000+5a3000]
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** Also affects: cloud-archive
Importance: Undecided
Status: New
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Title:
librbd: potential race conditions handling API IO completions
Public bug reported:
We've noticed an issue with a VM crashing with the following log record:
[Sat Oct 24 15:54:40 2020] tp_librbd[65017]: segfault at 3f21 ip
7f5ea8796266 sp 7f5e82ffc500 error 4 in
librbd.so.1.12.0[7f5ea85b7000+5a3000]
With the following packages:
ii librbd1
I've verified that at least my issue is resolved by this:
```
docker run -it --rm ubuntu:18.04
apt update
apt install g++ wget
wget https://sourceware.org/bugzilla/attachment.cgi?id=11382 -O bug23861.c
sed -i 's/do_exit = 0/do_exit(0)/' bug23861.c
g++ bug23861.c -lpthread -o bug23861
for
So, it turns out that 2.27-3ubuntu1.3 could fix this because of the fact
that not only does it include that patch, but a full rebase to 2.27
branch of upstream glibc, which does include the other fix mentioned
above (I found this out when I tried to rebuild locally and found out
that quilt was
*** This bug is a duplicate of bug 1851263 ***
https://bugs.launchpad.net/bugs/1851263
Upon checking, it seems that the latest proposed release actually
includes a full rebase to 2.27 which has the fix.
** This bug has been marked a duplicate of bug 1851263
Ubuntu 18.04.3 LTS bump Glibc
Public bug reported:
I'm reporting this here in order to help track fixing this inside
Ubuntu, 18.04 as its' already been fixed upstream:
https://sourceware.org/bugzilla/show_bug.cgi?id=23861
I can confirm that this issue indeed occurs on a Ubuntu 18.04 system
*and* it even occurs with the
I have done some extensive research on this and I am able to confirm
that while Bug #1864864 does solve a class of issues, it does not solve
the one affecting Open vSwitch, as it does rely on
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP:
*** This bug is a duplicate of bug 1864864 ***
https://bugs.launchpad.net/bugs/1864864
This upstream bug reported already has an SRU in-place.
** This bug has been marked a duplicate of bug 1864864
[SRU] pthread_rwlock_trywrlock results in hang
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Thank you Serge. We would appreciate if it can make it the OpenStack
cloud archive. We're running Liberty on Trusty at the moment.
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Title:
VM
Serge,
Yes, because it creates a *tremendous* amount of messages in the system
log which causes other issues to go unnoticed (or forces us to implement
filtering to drop this -- both of which are not ideal).
In a loaded system of 40 VMs, the syslog is bombarded with these
messages non-stop.
It looks like this bug has regressed due to the path of lttng-ust-wait-5
path changing to the following:
/run/shm/lttng-ust-wait-5
Would someoone be kind enough to release a fix for this?
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It looks like this bug has regressed due to the path of lttng-ust-wait-5
path changing to the following:
/run/shm/lttng-ust-wait-5
Would someoone be kind enough to release a fix for this?
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Public bug reported:
This seems like a regression of the following bug
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1432644
It seems that the path is now /run/shm/lttng-ust-wait-5 which results in
a flood of the following
Dec 26 04:47:44 compute-4-ca-ymq-2 kernel: [1751079.003742]
Public bug reported:
This seems like a regression of the following bug
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1432644
It seems that the path is now /run/shm/lttng-ust-wait-5 which results in
a flood of the following
Dec 26 04:47:44 compute-4-ca-ymq-2 kernel: [1751079.003742]
Hi Serge,
I have done some debugging and the solution is here:
https://github.com/libvirt/libvirt/commit/a188c57d5432fce72daf818ccdb970ee6b71e936
The qemu-ga (/var/lib/libvirt/qemu/org.qemu.guest_agent.0.instance-
00a0.sock) socket is being rejected and virt-aa-helper is failing,
due to the
Public bug reported:
Hello,
# lsb_release -rd
Description:Ubuntu 14.04.3 LTS
Release:14.04
Using the Ubuntu Cloud Archive (Kilo) packages, there is no python-
libvirt package that is shipped so it's using the one that is shipped
with Ubuntu 14.04 that is 1.2.2-0ubuntu2. However,
We're currently running our infrastructure on Trusty so ideally we
wouldn't want to install the package above... is there a Trusty package
to test somewhere?
Thanks!
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We're currently running our infrastructure on Trusty so ideally we
wouldn't want to install the package above... is there a Trusty package
to test somewhere?
Thanks!
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Public bug reported:
OpenStack Nova Kilo release requires 1.8.2 or higher, this is due to the
addition of on_execute and on_completion to the execute(..) function.
The latest Ubuntu OpenStack Kilo packages currently have code that
depend on this new updated release. This results in a crash in
Public bug reported:
OpenStack Nova Kilo release requires 1.8.2 or higher, this is due to the
addition of on_execute and on_completion to the execute(..) function.
The latest Ubuntu OpenStack Kilo packages currently have code that
depend on this new updated release. This results in a crash in
I think this is a different issue you're describing, connectivity
doesn't drop with this but it becomes very flakey, large latency spikes,
etc. It would never 100% drop
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This seems to have taken care of it
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=54d27365cae88fbcc853b391dcd561e71acb81fa
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Chris,
There's been a few other proposed patches, but my biggest issue now is
trying to replicate it over here before trying to look at patches, or
else there's no way for me to say this works.
I'm working on something to try and replicate it today and I'll keep
this bug updated.. I hope it goes
Seems to have addressed the issue. :)
** Tags removed: verification-needed
** Tags added: verification-done
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Title:
Crash when removing
There is currently a pending patch for this issue, I'll update the bug
when it lands
http://lkml.iu.edu/hypermail/linux/kernel/1505.3/01029.html
http://lkml.iu.edu/hypermail/linux/kernel/1505.3/01030.html
Thank you
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Public bug reported:
We've seen this crash at least 3 times when we start setting CPU limits
using `cgroups`. It makes using CPU limits impossible, causing
instabilities in the operating system. Finally, after installing linux-
crashdump, we got a full copy of the crash message.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Title:
KVM and CFS bandwidth control causes kernel crashes (oops)
To
Just wanted to add this as it might be useful (I'm trying to do
troubleshooting):
crash dis -rl 810af2f8
/build/buildd/linux-lts-utopic-3.16.0/kernel/sched/fair.c: 4745
0x810af280 pick_next_task_fair: nopl 0x0(%rax,%rax,1)
0x810af285 pick_next_task_fair+5: push
I suspect the following has occured:
https://github.com/torvalds/linux/blob/v3.16/kernel/sched/fair.c#L4829
if (!cfs_rq-nr_running)
goto idle;
put_prev_task(rq, prev);
do {
se = pick_next_entity(cfs_rq, NULL);
Hi,
Tested in 15.04, fixed and working properly.
Thanks,
Mohammed
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Title:
Crash when removing filterref frominterface with update-device
I will check it out and let you know.
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Title:
Crash when removing filterref frominterface with update-device
To manage notifications about
Public bug reported:
Hello,
We're running into this issue on our 14.04 LTS hosts, when removing all
filterref's on an interface, it results in a crash.
# virsh dump-xml e7276b62-887f-443e-b85b-ea3b5c395924
.
interface type='bridge'
mac address='fa:16:3e:1c:cf:99'/
source
Public bug reported:
Hello,
We're running into this issue on our 14.04 LTS hosts, when removing all
filterref's on an interface, it results in a crash.
# virsh dump-xml e7276b62-887f-443e-b85b-ea3b5c395924
.
interface type='bridge'
mac address='fa:16:3e:1c:cf:99'/
source
Hi,
I installed a new machine from the 14.04.2 media which gave me the HWE
stack with kernel 3.16.0-33-generic and it's running with no problems.
The machine is now loaded up to 125GB worth of VMs and with the
following memory stats:
# free -m
total used free shared
I'd just like to report in that I couldn't get it to work, it only did
after raising the limit to 256M on a server with 256GB of memory.
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Title:
Hi Chris,
Thanks for the help so far. I'm deploying a new machine right now and
I'll be trying to replicate it on -48.
The way I detected it was that i'd see messaging in dmesg on guest
similar to this:
hrtimer: interrupt took 4352551231 ns
In addition, when pinging the machine, you'd have a
I am seeing the issue in 3.13.0-46-generic as well.
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Title:
Using KSM on NUMA capable machines can cause KVM guest performance and
stability
Public bug reported:
This seems to be a bug that has regressed, I have encountered the same
issue as 2 other reports:
LP: #1349897
Running kernel: 3.13.0-46-generic
This is replicated over many compute nodes (KVM) running OpenStack.
The workaround is to disable KSM:
echo 2
apport information
** Tags added: apport-collected trusty
** Description changed:
This seems to be a bug that has regressed, I have encountered the same
issue as 2 other reports:
LP: #1349897
Running kernel: 3.13.0-46-generic
This is replicated over many compute nodes (KVM)
apport information
** Attachment added: UdevDb.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353434/+files/UdevDb.txt
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Title:
KSM
apport information
** Attachment added: CurrentDmesg.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353427/+files/CurrentDmesg.txt
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apport information
** Attachment added: UdevLog.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353435/+files/UdevLog.txt
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Title:
apport information
** Attachment added: WifiSyslog.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353436/+files/WifiSyslog.txt
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apport information
** Attachment added: ProcModules.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353433/+files/ProcModules.txt
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apport information
** Attachment added: ProcInterrupts.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353432/+files/ProcInterrupts.txt
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apport information
** Attachment added: ProcEnviron.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353431/+files/ProcEnviron.txt
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apport information
** Attachment added: IwConfig.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353428/+files/IwConfig.txt
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Title:
apport information
** Attachment added: Lspci.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353429/+files/Lspci.txt
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Title:
KSM
apport information
** Attachment added: ProcCpuinfo.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353430/+files/ProcCpuinfo.txt
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apport information
** Attachment added: IwConfig.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353445/+files/IwConfig.txt
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Title:
apport information
** Attachment added: Lspci.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353446/+files/Lspci.txt
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Title:
KSM
apport information
** Attachment added: ProcInterrupts.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353450/+files/ProcInterrupts.txt
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apport information
** Attachment added: ProcCpuinfo.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353448/+files/ProcCpuinfo.txt
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apport information
** Attachment added: UdevDb.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353452/+files/UdevDb.txt
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Title:
KSM
apport information
** Attachment added: UdevLog.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353453/+files/UdevLog.txt
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Title:
apport information
** Attachment added: ProcModules.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353451/+files/ProcModules.txt
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I'll be setting up a new server in the next few days, I'll attempt to
use -48 and see if that issue is present or not.
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Title:
KSM causing
apport information
** Attachment added: ProcEnviron.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353449/+files/ProcEnviron.txt
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apport information
** Attachment removed: BootDmesg.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1435363/+attachment/4353426/+files/BootDmesg.txt
** Attachment removed: CurrentDmesg.txt
apport information
** Attachment added: Lsusb.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353447/+files/Lsusb.txt
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Title:
KSM
apport information
** Attachment added: WifiSyslog.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353454/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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apport information
** Attachment added: CurrentDmesg.txt
https://bugs.launchpad.net/bugs/1435363/+attachment/4353444/+files/CurrentDmesg.txt
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Public bug reported:
Hello!
This is a bug in the current release, it has been addressed by this fix:
https://github.com/openstack/glance_store/commit/3bb94dcad84ed4204d8809fcf95b7713daa2189b
Could this be back ported?
Thanks
** Affects: python-glance-store (Ubuntu)
Importance: Undecided
Public bug reported:
Hello!
This is a bug in the current release, it has been addressed by this fix:
https://github.com/openstack/glance_store/commit/3bb94dcad84ed4204d8809fcf95b7713daa2189b
Could this be back ported?
Thanks
** Affects: python-glance-store (Ubuntu)
Importance: Undecided
Further investigation, first the type will always work because it just
returns a string with zero processing.
http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-
precise.git;a=blob;f=drivers/xen/sys-
hypervisor.c;h=1e0fe01eb6705dee98acd115be1ab781cdabbc10;hb=ba6c2f688e255a1f52f2930ae9e6d62ede804289#l37
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