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| author | Wu Fengguang <fengguang.wu@intel.com> | 2011-05-04 19:54:37 -0600 |
|---|---|---|
| committer | Wu Fengguang <fengguang.wu@intel.com> | 2011-07-09 22:09:01 -0700 |
| commit | d46db3d58233be4be980eb1e42eebe7808bcabab (patch) | |
| tree | 6d813b33938d915f0c0633e8615d1ffdcc554c96 /include/linux/writeback.h | |
| parent | 36715cef0770b7e2547892b7c3197fc024274630 (diff) | |
| download | talos-obmc-linux-d46db3d58233be4be980eb1e42eebe7808bcabab.tar.gz talos-obmc-linux-d46db3d58233be4be980eb1e42eebe7808bcabab.zip | |
writeback: make writeback_control.nr_to_write straight
Pass struct wb_writeback_work all the way down to writeback_sb_inodes(),
and initialize the struct writeback_control there.
struct writeback_control is basically designed to control writeback of a
single file, but we keep abuse it for writing multiple files in
writeback_sb_inodes() and its callers.
It immediately clean things up, e.g. suddenly wbc.nr_to_write vs
work->nr_pages starts to make sense, and instead of saving and restoring
pages_skipped in writeback_sb_inodes it can always start with a clean
zero value.
It also makes a neat IO pattern change: large dirty files are now
written in the full 4MB writeback chunk size, rather than whatever
remained quota in wbc->nr_to_write.
Acked-by: Jan Kara <jack@suse.cz>
Proposed-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Diffstat (limited to 'include/linux/writeback.h')
| -rw-r--r-- | include/linux/writeback.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 2f1b512bd6e0..df1b7f18f100 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -24,12 +24,9 @@ enum writeback_sync_modes { */ struct writeback_control { enum writeback_sync_modes sync_mode; - unsigned long *older_than_this; /* If !NULL, only write back inodes - older than this */ long nr_to_write; /* Write this many pages, and decrement this for each page written */ long pages_skipped; /* Pages which were not written */ - long inodes_written; /* # of inodes written (at least) */ /* * For a_ops->writepages(): is start or end are non-zero then this is @@ -56,8 +53,7 @@ void writeback_inodes_sb_nr(struct super_block *, unsigned long nr); int writeback_inodes_sb_if_idle(struct super_block *); int writeback_inodes_sb_nr_if_idle(struct super_block *, unsigned long nr); void sync_inodes_sb(struct super_block *); -void writeback_inodes_wb(struct bdi_writeback *wb, - struct writeback_control *wbc); +long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages); long wb_do_writeback(struct bdi_writeback *wb, int force_wait); void wakeup_flusher_threads(long nr_pages); |
