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@xxxxxxxxxxxxx> 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?
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_SMP is not set
which means it probably is the same rcu free starvation problem as
reported in that thread.