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authorLinus Torvalds <torvalds@linux-foundation.org>2011-08-25 10:40:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-08-25 10:40:12 -0700
commite33f2d238e2e53e264c758c0849423a9308eb63e (patch)
tree8137292b733fe0f8d10b8d004f2c58a9740c829b /mm
parentMerge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/cpupowerutils (diff)
parentsqueeze max-pause area and drop pass-good area (diff)
downloadlinux-dev-e33f2d238e2e53e264c758c0849423a9308eb63e.tar.xz
linux-dev-e33f2d238e2e53e264c758c0849423a9308eb63e.zip
Merge branch 'urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback
* 'urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback: squeeze max-pause area and drop pass-good area
Diffstat (limited to 'mm')
-rw-r--r--mm/page-writeback.c15
1 files changed, 2 insertions, 13 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index d1960744f881..0e309cd1b5b9 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -754,21 +754,10 @@ static void balance_dirty_pages(struct address_space *mapping,
* 200ms is typically more than enough to curb heavy dirtiers;
* (b) the pause time limit makes the dirtiers more responsive.
*/
- if (nr_dirty < dirty_thresh +
- dirty_thresh / DIRTY_MAXPAUSE_AREA &&
+ if (nr_dirty < dirty_thresh &&
+ bdi_dirty < (task_bdi_thresh + bdi_thresh) / 2 &&
time_after(jiffies, start_time + MAX_PAUSE))
break;
- /*
- * pass-good area. When some bdi gets blocked (eg. NFS server
- * not responding), or write bandwidth dropped dramatically due
- * to concurrent reads, or dirty threshold suddenly dropped and
- * the dirty pages cannot be brought down anytime soon (eg. on
- * slow USB stick), at least let go of the good bdi's.
- */
- if (nr_dirty < dirty_thresh +
- dirty_thresh / DIRTY_PASSGOOD_AREA &&
- bdi_dirty < bdi_thresh)
- break;
/*
* Increase the delay for each loop, up to our previous