Re: [GIT PULL v2] Early SLAB fixes for 2.6.31

[Benjamin Herrenschmidt]

> Adds code to hot code path.

A single mask which should be mostly in the noise...

> The allocators mask flags passed to the page allocator through
> GFP_RECLAIM_MASK|GFP_CONSTRAINT_MASK. This is done outside of the critical
> code paths.
> 
> The might_sleep issues may be fixed by adding another check to
> __might_sleep().

That is not enough because slab and slub explicitely re-enable
interrupts when __GFP_WAIT is set, which is the problem we need to solve
in the first place, so we need to do the masking there.

Cheers,
Ben.


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