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
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
@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
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
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,
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.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at
** Branch linked: lp:ubuntu/lucid-updates/linux-lts-backport-natty
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
To manage
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
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
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
** Tags removed: verification-needed-oneiric
** Tags added: verification-done-oneiric
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
@Lauri Ojansivu: testing until friday is fine.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
To manage notifications about this
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
@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
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:
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
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
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
In the meantime we'll try to freeze previous working kernel version so
it does not update automatically yet.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at
Could we have test kernel for current Ubuntu Oneiric version?
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
To manage
** 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)
** 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
** Also affects: linux (Ubuntu Natty)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Oneiric)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
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.
**
** Tags added: patch
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
To manage notifications about this bug go to:
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
Thanks a lot! We will test proposed kernels then. This kernel patch
fixed problem for us, no downtime since the change.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at
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.
Thanks! We have started to use x86 version and will monitor the
situation how it stays up.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at
Stefan, we currently have instances crashing all the time during high
load due to this bug so test packages for this are needed. Thanks!
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
** Tags added: server-o-ro
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
To manage notifications about this bug go to:
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.
--
You received this bug notification because you are a member of Ubuntu
In this related Amazon forum thread:
https://forums.aws.amazon.com/thread.jspa?threadID=73763tstart=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:
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
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.
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
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.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at
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.
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
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
To manage notifications about this bug go to:
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
To manage
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:
41 matches
Mail list logo
