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| author | Wu Fengguang <fengguang.wu@intel.com> | 2010-08-11 14:17:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-12 08:43:29 -0700 |
| commit | 16c4042f08919f447d6b2a55679546c9b97c7264 (patch) | |
| tree | 0248b64d46237854ebe67efe8c742cb5878d8611 /fs/fs-writeback.c | |
| parent | e50e37201ae2e7d6a52e87815759e6481f0bcfb9 (diff) | |
| download | lwn-16c4042f08919f447d6b2a55679546c9b97c7264.tar.gz lwn-16c4042f08919f447d6b2a55679546c9b97c7264.zip | |
writeback: avoid unnecessary calculation of bdi dirty thresholds
Split get_dirty_limits() into global_dirty_limits()+bdi_dirty_limit(), so
that the latter can be avoided when under global dirty background
threshold (which is the normal state for most systems).
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 2f76c4a081a2..fca43d4d7bf4 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -590,7 +590,7 @@ static inline bool over_bground_thresh(void) { unsigned long background_thresh, dirty_thresh; - get_dirty_limits(&background_thresh, &dirty_thresh, NULL, NULL); + global_dirty_limits(&background_thresh, &dirty_thresh); return (global_page_state(NR_FILE_DIRTY) + global_page_state(NR_UNSTABLE_NFS) >= background_thresh); |