Piteball/android_kernel_samsung_msm8976
1
1
Fork 0
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git synced 2024-09-21 11:53:01 +00:00
Code Issues Projects Releases Wiki Activity

mm: vmscan: treat pages marked for immediate reclaim as zone congestion

Browse source 
Currently a zone will only be marked congested if the underlying BDI is
congested but if dirty pages are spread across zones it is possible that
an individual zone is full of dirty pages without being congested.  The
impact is that zone gets scanned very quickly potentially reclaiming
really clean pages.  This patch treats pages marked for immediate
reclaim as congested for the purposes of marking a zone ZONE_CONGESTED
and stalling in wait_iff_congested.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Cc: Zlatko Calusic <zcalusic@bitsync.net>
Cc: dormando <dormando@rydia.net>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: d04e8acd03e5c3421ef18e3da7bc88d56179ca42
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: I321615bb32c4efe5889df9ce6482c825d7a816e6
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
This commit is contained in:
Mel Gorman 2013-07-03 15:02:03 -07:00 committed by Vinayak Menon
parent f2d250b88f
commit ec0304daef
1 changed files with 8 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
mm/vmscan.c
View file

@ -849,9 +849,15 @@ static unsigned long shrink_page_list(struct list_head *page_list,
if (dirty && !writeback)
nr_unqueued_dirty++;
/* Treat this page as congested if underlying BDI is */
/*
* Treat this page as congested if the underlying BDI is or if
* pages are cycling through the LRU so quickly that the
* pages marked for immediate reclaim are making it to the
* end of the LRU a second time.
*/
mapping = page_mapping(page);
if (mapping && bdi_write_congested(mapping->backing_dev_info))
if ((mapping && bdi_write_congested(mapping->backing_dev_info)) ||
(writeback && PageReclaim(page)))
nr_congested++;
/*