Re: [PATCH] slub: Avoid direct compaction if possible

From: David Rientjes
Date: Mon Jun 17 2013 - 17:45:03 EST

On Mon, 17 Jun 2013, Roman Gushchin wrote:

> > FWIW, there were some compaction locking related patches merged
> > around 3.7. See 2a1402aa044b55c2d30ab0ed9405693ef06fb07c and follow ups.
> Thanks, Michal.
> I've already tried to backport some of those patches, but it didn't help
> (may be it wasn't enough).

They certainly aren't enough, the kernel you're running suffers from a
couple different memory compaction issues that were fixed in 3.7. I
couldn't sympathize with your situation more, I faced the same issue
because of thp and not slub (we use slab).

> I'll try to reproduce the issue on raw 3.9.

Thanks. If you need to go back to 3.4, try using these, they
significantly helped our issues:

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