Re: [RFC 0/7] Postphone reclaim laundry to write at high water marks

On Wed, Aug 22, 2007 at 12:09:03AM +0200, Peter Zijlstra wrote:
Strictly speaking:

if:

page = alloc_page(gfp);

fails but:

obj = kmem_cache_alloc(s, gfp);

succeeds then its a bug.

Why? this is like saying that if alloc_pages(order=1) fails but
alloc_pages(order=0) succeeds then it's a bug. Obviously it's not a
bug.

The only bug is if slab allocations <=4k fails despite
alloc_pages(order=0) would succeed.
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