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| author | Shaohua Li <shaohua.li@intel.com> | 2011-03-17 10:47:06 +0100 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-03-17 10:47:06 +0100 |
| commit | 9b6096a65f99a89dfd8328c4e469e7b53b3ae04a (patch) | |
| tree | 8853a3c389d40bda6fd5e109179be29695d536af /mm | |
| parent | blk-cgroup: Add unaccounted time to timeslice_used. (diff) | |
| download | linux-9b6096a65f99a89dfd8328c4e469e7b53b3ae04a.tar.xz linux-9b6096a65f99a89dfd8328c4e469e7b53b3ae04a.zip | |
mm: make generic_writepages() use plugging
This recovers a performance regression caused by the removal
of the per-device plugging.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page-writeback.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index cc0ede169e41..24b7ac2bc36b 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1039,11 +1039,17 @@ static int __writepage(struct page *page, struct writeback_control *wbc, int generic_writepages(struct address_space *mapping, struct writeback_control *wbc) { + struct blk_plug plug; + int ret; + /* deal with chardevs and other special file */ if (!mapping->a_ops->writepage) return 0; - return write_cache_pages(mapping, wbc, __writepage, mapping); + blk_start_plug(&plug); + ret = write_cache_pages(mapping, wbc, __writepage, mapping); + blk_finish_plug(&plug); + return ret; } EXPORT_SYMBOL(generic_writepages); |