Re: [PATCH 1/2] Have kswapd keep a minimum order free other than order-0

[Nick Piggin <nickpiggin@yahoo.com.au>]

Mel Gorman wrote:

> ======
> 
> On third thought: The trouble with this solution is that we will now set
> the order to that used by the largest kmalloc cache. Bad... this could be
> 6 on i386 to 13 if CONFIG_LARGE_ALLOCs is set. The large kmalloc caches are
> rarely used and we are used to OOMing if those are utilized to frequently.
> 
> I guess we should only set this for non kmalloc caches then. 
> So move the call into kmem_cache_create? Would make the min order 3 on
> most of my mm machines.
> ===

Also, I might add that the e1000 page allocations failures usually come
from kmalloc, so doing this means they might just be protected by chance
if someone happens to create a kmem cache of order 3.

-- 
SUSE Labs, Novell Inc.

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