This bug was fixed in the package linux - 3.0.0-14.23
---
linux (3.0.0-14.23) oneiric-proposed; urgency=low
[Herton R. Krzesinski]
* Release Tracking Bug
- LP: #893213
[ Andy Whitcroft ]
* debian: add locking to protect debian/files from parallel update
[ Konrad Rzes
This bug was fixed in the package linux - 3.2.0-3.7
---
linux (3.2.0-3.7) precise; urgency=low
[ Stefan Bader ]
* SAUCE: x86/paravirt: PTE updates in k(un)map_atomic need to be
synchronous, regardless of lazy_mmu mode
- LP: #854050
[ Tim Gardner ]
* rebase to v3.2-r
Rolf, thanks a lot for testing it! And I think it's enough you have
tested it in production for this verification to be done.
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Title:
BUG at /buil
We have been suffering from this problem on an Amazon EC2 instance
running Oneiric. The instance was freezing about once a day on busy days
due to forking done by apache-mpm-prefork.
After installing the proposed kernel 3.0.0-14.23, we have not seen the
error reoccur. As far as we are concerned, t
@Lauri Ojansivu: once you finish testing, please change the tag back to
verification-done-oneiric.
** Tags removed: verification-done-oneiric
** Tags added: verification-needed-oneiric
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h
@Lauri Ojansivu: testing until friday is fine.
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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** Tags removed: verification-needed-oneiric
** Tags added: verification-done-oneiric
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
Coworker tested some time today but his time run out and had already
shut down instances before getting logs. So I'll tomorrow test more, but
also I see that time to test it is running out, and we need this patch
in Oneiric so that upgrading to Oneiric isn't blocked. I will post
results of our test
Note, that there is now a proposed kernel for Oneiric with the patch
applied. It would be good if someone could also provide feedback about
that kernel. Thanks
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** Branch linked: lp:ubuntu/lucid-updates/linux-lts-backport-natty
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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This bug was fixed in the package linux - 2.6.38-13.52
---
linux (2.6.38-13.52) natty-proposed; urgency=low
[Herton R. Krzesinski]
* Release Tracking Bug
- LP: #887379
[ Konrad Rzeszutek Wilk ]
* SAUCE: x86/paravirt: Partially revert "remove lazy mode in interrupts"
This bug is awaiting verification that the kernel for Oneiric in
-proposed solves the problem (3.0.0-14.23). Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-oneiric' to 'verification-done-oneiric'.
If verification is not do
@Lauri Ojansivu: the natty update is on testing/QA now, if everything
goes well we should have the update officially released in 1 week,
nothing else needed.
About oneiric, the fix is scheduled to be included in next update, just
wait here when the update is ready to be verified, I'll ask here for
Is there anything else that is needed to continue this SRU process for
Natty?
And how about this patch with Oneiric? We'd like to upgrade to Oneiric
at some point, at development environment there's some instances updated
already but have not yet tested with Apache under high load, it would be
saf
We have tested it under high load and it has performed well, here's the
boot log, nothing bug related was there:
Xen Minimal OS!
start_info: 0xb1a000(VA)
nr_pages: 0x6cc00
shared_inf: 0xbff4a000(MA)
pt_base: 0xb1d000(VA)
nr_pt_frames: 0x9
mfn_list: 0x967000(VA)
mod_start:
This bug is awaiting verification that the kernel for Natty in -proposed
solves the problem (2.6.38-13.52). Please test the kernel and update
this bug with the results. If the problem is solved, change the tag
'verification-needed-natty' to 'verification-done-natty'.
If verification is not done by
In the meantime we'll try to freeze previous working kernel version so
it does not update automatically yet.
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Title:
BUG at /build/buildd/linux-2.
Ubuntu kernel has updates to 12:
Booting 'Ubuntu 11.04, kernel 2.6.38-12-virtual'
And here's the same bug again:
cloud-init boot finished at Mon, 07 Nov 2011 10:06:53 +. Up 31.47 seconds
[82511.071442] [ cut here ]
[82511.071467] kernel BUG at /build/buildd/linux-2.6.38
Could we have test kernel for current Ubuntu Oneiric version?
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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** Changed in: linux (Ubuntu Natty)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Natty)
Status: New => Fix Committed
** Changed in: linux (Ubuntu Natty)
Assignee: (unassigned) => Stefan Bader (stefan-bader-canonical)
** Changed in: linux (Ubuntu Oneiric)
Importa
This would be the backported version of the upstream patch. Since the
change that is taken back was in 2.6.31 there may be a problem in
Maverick and Lucid as well. But I am not sure that this problem has been
observed there. At least this specific crash seems to have started with
2.6.37 only.
** P
** Also affects: linux (Ubuntu Natty)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Oneiric)
Importance: Undecided
Status: New
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** Description changed:
+ SRU Justification:
+
+ Impact: An upstream change in 2.6.31 tried to simplify the conditions of
+ having the lazy mmu mode in paravirt disabled. With that in mind several
+ instances where the lazy mmu mode was disabled explicitly have been
+ removed. However it was foun
** Tags added: patch
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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Thanks a lot! We will test proposed kernels then. This kernel patch
fixed problem for us, no downtime since the change.
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Title:
BUG at /build/bui
Right now I am waiting to see this change really get into the upstream
kernel tree. As soon as that happens I would start the SRU process. At
some point there will be an update here saying that proposed kernels are
ready for verification. At that time your help in testing those is
needed and highly
Since installing patched kernel we have not needed to manually terminate
instances and site has been available all the time. The bug has not
appeared again.
Currently running instances have uptime of:
- 1 day 6 min
- 13:14
- 2:33
Currently there is low traffic so only 3 instances in use. Autoscal
Thanks! We have started to use x86 version and will monitor the
situation how it stays up.
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c
I put the kernel packages to http://people.canonical.com/~smb/lp854050/
The version number is overriding the current 11.04 kernel but I cannot prevent
a newer official kernel package to override that when it gets released.
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** Tags added: server-o-ro
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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Stefan, we currently have instances crashing all the time during high
load due to this bug so test packages for this are needed. Thanks!
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Title:
B
x86 version of the same package is also used on some servers that don't
need so much memory so it would be nice to have too.
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Title:
BUG at /build
Amazon EC2 instance where we had this has this in boot log with latest updates:
Booting 'Ubuntu 11.04, kernel 2.6.38-11-virtual'
That 2.6.38-11-virtual kernel is in Ubuntu Natty repositories as I just
searched. It's for x86_64. If test kernel package is created, how do I prevent
other Ubuntu ker
That patch has been submitted today (basically the one referenced
above). According to the commit ID that is said to introduce the
problem, this would affect everything back to 2.6.32 (Lucid). However
potentially for Lucid only the non-ec2 kernels as for ec2 we got a very
different xen codebase.
*
As I understand it this would affect forks under heavy load, so not only
apache would be at risk. If there is need I could provide test kernel
packages, I am just not sure which release to start with. Please let me
know. Also has someone succeeded in re-creating the problem without
apache involveme
In this related Amazon forum thread:
https://forums.aws.amazon.com/thread.jspa?threadID=73763&tstart=0
is link to a patch:
https://lkml.org/lkml/2011/9/22/331
Could the affected people test does this fix it? And if yes, get it into Ubuntu
kernel? At leas on LKML it has been confirmed to work:
htt
So far I have not been successful in reproducing the crash above. Neither on
Amazon instances, nor on my own testsystem. Though I only used the eatmem code
mentioned in the LKML thread. There was a php example in some other threads but
that seemed to require some other hosts for communication.
I
The ami which was reported to cause the problems, as well as the traces
I saw so far are about ubuntu 11.04 but at least with a kernel at the
level of release (2.6.38-8.42). It is probably part of the problem that
"the Ubuntu image" not necessarily is the latest one. Even if any bug
was fixed by st
Reposting stack trace from AWS Forum:
http://1031641.210729 cut here
http://1031641.210760 kernel BUG at
/build/buildd/linux-2.6.38/mm/swapfile.c:2552!
http://1031641.210775 invalid opcode: 1 SMP
http://1031641.210788 last sysfs file:
/sys/devices/system/cpu/cpu1/ca
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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