]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm/page_owner: set correct gfp_mask on page_owner
authorJoonsoo Kim <js1304@gmail.com>
Fri, 17 Jul 2015 23:24:18 +0000 (16:24 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 17 Jul 2015 23:39:54 +0000 (16:39 -0700)
commite2cfc91120fa01e3458167054af993fb83d7d0ec
tree22ffd1c08779eb7ff49c313202cfe03492397c29
parentf3a14ced32513d103a3ed0ce89c4e713fac01461
mm/page_owner: set correct gfp_mask on page_owner

Currently, we set wrong gfp_mask to page_owner info in case of isolated
freepage by compaction and split page.  It causes incorrect mixed
pageblock report that we can get from '/proc/pagetypeinfo'.  This metric
is really useful to measure fragmentation effect so should be accurate.
This patch fixes it by setting correct information.

Without this patch, after kernel build workload is finished, number of
mixed pageblock is 112 among roughly 210 movable pageblocks.

But, with this fix, output shows that mixed pageblock is just 57.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/page_owner.h
mm/page_alloc.c
mm/page_owner.c