]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
mm: use two zonelist that are filtered by GFP mask
authorMel Gorman <mel@csn.ul.ie>
Mon, 28 Apr 2008 09:12:16 +0000 (02:12 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 28 Apr 2008 15:58:18 +0000 (08:58 -0700)
commit54a6eb5c4765aa573a030ceeba2c14e3d2ea5706
tree547176a090beb787722a153cf2b8b942dc0e68db
parent18ea7e710d2452fa726814a406779188028cf1bf
mm: use two zonelist that are filtered by GFP mask

Currently a node has two sets of zonelists, one for each zone type in the
system and a second set for GFP_THISNODE allocations.  Based on the zones
allowed by a gfp mask, one of these zonelists is selected.  All of these
zonelists consume memory and occupy cache lines.

This patch replaces the multiple zonelists per-node with two zonelists.  The
first contains all populated zones in the system, ordered by distance, for
fallback allocations when the target/preferred node has no free pages.  The
second contains all populated zones in the node suitable for GFP_THISNODE
allocations.

An iterator macro is introduced called for_each_zone_zonelist() that interates
through each zone allowed by the GFP flags in the selected zonelist.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/parisc/mm/init.c
fs/buffer.c
include/linux/gfp.h
include/linux/mmzone.h
mm/hugetlb.c
mm/oom_kill.c
mm/page_alloc.c
mm/slab.c
mm/slub.c
mm/vmscan.c