Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [RFC][PATCH] mm: the page of MIGRATE_RESERVE don't insert into pcp | Date | Sun, 7 Dec 2008 17:22:48 +0900 (JST) |
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> > ====== CUT HERE ====== > From: Mel Gorman <mel@csn.ul.ie> > Subject: [RFC] Split per-cpu list into one-list-per-migrate-type > > Currently the per-cpu page allocator searches the PCP list for pages of the > correct migrate-type to reduce the possibility of pages being inappropriate > placed from a fragmentation perspective. This search is potentially expensive > in a fast-path and undesirable. Splitting the per-cpu list into multiple lists > increases the size of a per-cpu structure and this was potentially a major > problem at the time the search was introduced. These problem has been > mitigated as now only the necessary number of structures is allocated for the > running system. > > This patch replaces a list search in the per-cpu allocator with one list > per migrate type that should be in use by the per-cpu allocator - namely > unmovable, reclaimable and movable. > > Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Great.
this patch works well on my box too. and my review didn't find any bug.
very thanks.
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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