On Mon, 20 Mar 2006, Paul Jackson wrote:
> The patch below just adds the __GFP_NOCPUSET flag on the memory
> migration code path, where we need it. That code path is not
> performance critical.
>
> We can deal with the long standing bug in cpusets, where it overrides
> all alloc_pages_node() calls, some other day.
>
> What think you of this, Christoph? Should we send it to Andrew?
It does not fix the general problem that alloc_pages_node must not respect
cpusets. Slab, device drivers etc etc are still screwed up with this
patch.
We noticed this first in page migration but I think the other areas are
much more problematic.
The earlier patch is correct. What Andrew wanted is an optimization
not a general change in the patch. And
#ifdef CPUSETS
#endif
around the ORing of __GFP_NOCPUSET may suffice.
Maybe you got a better idea?
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