Re: [PATCH]: Free pages from local pcp lists under tight memory conditions

Christoph Lameter
2005-11-23T19:30:10Z

On Tue, 22 Nov 2005, Rohit Seth wrote:

> [PATCH]: This patch free pages (pcp->batch from each list at a time) from
> local pcp lists when a higher order allocation request is not able to
> get serviced from global free_list.

Ummm.. One controversial idea: How about removing the complete pcp
subsystem? Last time we disabled pcps we saw that the effect
that it had was within noise ratio on AIM7. The lru lock taken without
pcp is in the local zone and thus rarely contended.