kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Scott James Remnant, this bug was reported a while ago and there hasn't
been any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Changed in: linux (Ubuntu)
       Status: Triaged => Incomplete

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https://bugs.launchpad.net/bugs/386554

Title:
  System behaved as if OOM when it had plenty to spare

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Had the weirdest behaviour today, current karmic kernel.  I haven't
  got a swap partition or swap file configured, because I was playing
  with swapd and stuff earlier and hadn't turned them back on again.

  The system suddenly became extremely slow and unresponsive, with
  massive amounts of disk activity

  The thing is, here was the output of free at the time:

               total       used       free     shared    buffers     cached
  Mem:       1534944    1490160      44784          0      18396    1078164
  -/+ buffers/cache:     393600    1141344
  Swap:      0     0    0

  In other words, while it had actually 44MB free (which is still quite
  a lot, even though I was doing things in Firefox) - there was 1GB of
  cached pages sitting there - and I was doing much so most of them
  can't have been dirty!

  So why was the machine even touching the disk?  It should have been
  able to simply purge non-dirty pages from its cache and carry on

  Or am I grossly missing something?

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