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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-11 01:59:59 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-11 01:59:59 +0100
commit001a541ea9163ace5e8243ee0e907ad80a4c0ec2 (patch)
treea76225046369c440de93739add9823f5ea060245 /fs/fs-writeback.c
parentMerge branch 'akpm' (aka "Andrew's patch-bomb") (diff)
parentwriteback: move MIN_WRITEBACK_PAGES to fs-writeback.c (diff)
downloadlinux-001a541ea9163ace5e8243ee0e907ad80a4c0ec2.tar.xz
linux-001a541ea9163ace5e8243ee0e907ad80a4c0ec2.zip
Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
* 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux: writeback: move MIN_WRITEBACK_PAGES to fs-writeback.c writeback: balanced_rate cannot exceed write bandwidth writeback: do strict bdi dirty_exceeded writeback: avoid tiny dirty poll intervals writeback: max, min and target dirty pause time writeback: dirty ratelimit - think time compensation btrfs: fix dirtied pages accounting on sub-page writes writeback: fix dirtied pages accounting on redirty writeback: fix dirtied pages accounting on sub-page writes writeback: charge leaked page dirties to active tasks writeback: Include all dirty inodes in background writeback
Diffstat (limited to 'fs/fs-writeback.c')
-rw-r--r--fs/fs-writeback.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index e2951506434d..f855916657ba 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -20,6 +20,7 @@
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/mm.h>
+#include <linux/pagemap.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/writeback.h>
@@ -29,6 +30,11 @@
#include "internal.h"
/*
+ * 4MB minimal write chunk size
+ */
+#define MIN_WRITEBACK_PAGES (4096UL >> (PAGE_CACHE_SHIFT - 10))
+
+/*
* Passed into wb_writeback(), essentially a subset of writeback_control
*/
struct wb_writeback_work {
@@ -742,11 +748,17 @@ static long wb_writeback(struct bdi_writeback *wb,
if (work->for_background && !over_bground_thresh(wb->bdi))
break;
+ /*
+ * Kupdate and background works are special and we want to
+ * include all inodes that need writing. Livelock avoidance is
+ * handled by these works yielding to any other work so we are
+ * safe.
+ */
if (work->for_kupdate) {
oldest_jif = jiffies -
msecs_to_jiffies(dirty_expire_interval * 10);
- work->older_than_this = &oldest_jif;
- }
+ } else if (work->for_background)
+ oldest_jif = jiffies;
trace_writeback_start(wb->bdi, work);
if (list_empty(&wb->b_io))