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SubjectRe: PATCH 2.3.26: kmalloc GFP_ZERO
>>>>> "Jeff" == Jeff Garzik <> writes:

Jeff> Attached is a patch against 2.3.26 which adds the GFP_ZERO flag.
Jeff> There is a lot of code which does

Jeff> ptr = kmalloc(size, ...); memset (ptr, 0, size);

Jeff> This patch eliminates that second step. I didn't add it to
Jeff> __kmem_cache_alloc because that routine was already complex
Jeff> enough.

By doing this you add another `if' clause to hot path code in the
memory allocator, this is IMHO not a very good idea. Let the drivers
which know they need zeroed memory, clear it out themselves.

Putting it in kmem_cache_alloc would be even worse since it would
defeat the entire idea of SLAB.


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