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authorJens Axboe <jens.axboe@oracle.com>2010-05-21 20:00:35 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-05-21 20:00:35 +0200
commit6423104b6a1e6f0c18be60e8c33f02d263331d5e (patch)
treee22957400e9679bf82b62e03d6bd831181053945 /include/linux/backing-dev.h
parentf9eadbbd424c083b8005c7b738f644611b9ef489 (diff)
writeback: fixups for !dirty_writeback_centisecs
Commit 69b62d01 fixed up most of the places where we would enter busy schedule() spins when disabling the periodic background writeback. This fixes up the sb timer so that it doesn't get hammered on with the delay disabled, and ensures that it gets rearmed if needed when /proc/sys/vm/dirty_writeback_centisecs gets modified. bdi_forker_task() also needs to check for !dirty_writeback_centisecs and use schedule() appropriately, fix that up too. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/backing-dev.h')
-rw-r--r--include/linux/backing-dev.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index ff8bac63213..e6e0cb5437e 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -109,6 +109,7 @@ void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
long nr_pages, int sb_locked);
int bdi_writeback_task(struct bdi_writeback *wb);
int bdi_has_dirty_io(struct backing_dev_info *bdi);
+void bdi_arm_supers_timer(void);
extern spinlock_t bdi_lock;
extern struct list_head bdi_list;