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    SubjectRe: 2.6.39-rc4+: oom-killer busy killing tasks
    On Thu, Apr 28, 2011 at 08:16:29AM +0900, Minchan Kim wrote:
    > On Wed, Apr 27, 2011 at 7:28 PM, Dave Chinner <david@fromorbit.com> wrote:
    > > On Wed, Apr 27, 2011 at 12:46:51AM -0700, Christian Kujau wrote:
    > >> On Wed, 27 Apr 2011 at 12:26, Dave Chinner wrote:
    > >> > What this shows is that VFS inode cache memory usage increases until
    > >> > about the 550 sample mark before the VM starts to reclaim it with
    > >> > extreme prejudice. At that point, I'd expect the XFS inode cache to
    > >> > then shrink, and it doesn't. I've got no idea why the either the
    > >>
    > >> Do you remember any XFS changes past 2.6.38 that could be related to
    > >> something like this?
    > >
    > > There's plenty of changes that coul dbe the cause - we've changed
    > > the inode reclaim to run in the background out of a workqueue as
    > > well as via the shrinker, so it could even be workqueue starvation
    > > causing the the problem...
    >
    > RCU free starvation is another possibility?
    > https://lkml.org/lkml/2011/4/25/124

    You know, I've been waching that thread with interest, but it didn't
    seem to be related. However, now that I go look at the config file
    provided, I see:

    CONFIG_TINY_RCU=y
    # CONFIG_SMP is not set
    CONFIG_PREEMPT_NONE=y

    which means it probably is the same rcu free starvation problem as
    reported in that thread.

    Cheers,

    Dave.
    --
    Dave Chinner
    david@fromorbit.com


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