On Fri, Aug 28, 2015 at 06:06:32PM -0400, Tejun Heo wrote:
> On Fri, Aug 28, 2015 at 04:44:32PM -0400, Tejun Heo wrote:
> > Ah, cool, so it was a bug from slub. Punting to return path still has
> > some niceties but if we can't consistently get rid of stack
> > consumption it's not that attractive. Let's revisit it later together
> > with hard limit reclaim.
>
> So, I can't check right now but I'm pretty sure I was using SLAB on my
> test config, so this issue may exist there too.
Yeah, SLAB is broken too. It was accidentally broken by commit
4167e9b2cf10 ("mm: remove GFP_THISNODE"), which among other things made
SLAB filter out __GFP_WAIT from gfp flags when probing a NUMA node. I'll
take a look what we can do with that.
Thanks,
Vladimir
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