Re: [BUGFIX][PATCH] oom-kill: fix NUMA consraint check withnodemask v2

[KAMEZAWA Hiroyuki]

On Tue, 10 Nov 2009 16:39:02 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> wrote:

> > > > +
> > > > +	/* Check this allocation failure is caused by cpuset's wall function */
> > > > +	for_each_zone_zonelist_nodemask(zone, z, zonelist,
> > > > +			high_zoneidx, nodemask)
> > > > +		if (!cpuset_zone_allowed_softwall(zone, gfp_mask))
> > > >  			return CONSTRAINT_CPUSET;
> > > 
> > > If cpuset and MPOL_BIND are both used, Probably CONSTRAINT_MEMORY_POLICY is
> > > better choice.
> > 
> > No. this memory allocation is failed by limitation of cpuset's alloc mask.
> > Not from mempolicy.
> 
> But CONSTRAINT_CPUSET doesn't help to free necessary node memory. It isn't
> your fault. original code is wrong too. but I hope we should fix it.
> 
Hmm, maybe fair enough.

My 3rd version will use "kill always current(CONSTRAINT_MEMPOLICY does this)
if it uses mempolicy" logic.

Objections ?

Thanks,
-Kame

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