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authorChristoph Hellwig <hch@infradead.org>2011-08-23 14:50:29 +0200
committerJens Axboe <jaxboe@fusionio.com>2011-08-23 14:50:29 +0200
commit65299a3b788bd274bed92f9fa3232082c9f3ea70 (patch)
tree191c0afe31c15ac4c1bab96e0a07fddb097d0de8 /fs/gfs2/meta_io.c
parent5dc06c5a70b79a323152bec7e55783e705767e63 (diff)
downloadlinux-65299a3b788bd274bed92f9fa3232082c9f3ea70.tar.bz2
block: separate priority boosting from REQ_META
Add a new REQ_PRIO to let requests preempt others in the cfq I/O schedule, and lave REQ_META purely for marking requests as metadata in blktrace. All existing callers of REQ_META except for XFS are updated to also set REQ_PRIO for now. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/gfs2/meta_io.c')
-rw-r--r--fs/gfs2/meta_io.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 747238cd9f96..be29858900f6 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -37,7 +37,7 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
{
struct buffer_head *bh, *head;
int nr_underway = 0;
- int write_op = REQ_META |
+ int write_op = REQ_META | REQ_PRIO |
(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
BUG_ON(!PageLocked(page));
@@ -225,7 +225,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
}
bh->b_end_io = end_buffer_read_sync;
get_bh(bh);
- submit_bh(READ_SYNC | REQ_META, bh);
+ submit_bh(READ_SYNC | REQ_META | REQ_PRIO, bh);
if (!(flags & DIO_WAIT))
return 0;
@@ -435,7 +435,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
if (buffer_uptodate(first_bh))
goto out;
if (!buffer_locked(first_bh))
- ll_rw_block(READ_SYNC | REQ_META, 1, &first_bh);
+ ll_rw_block(READ_SYNC | REQ_META | REQ_PRIO, 1, &first_bh);
dblock++;
extlen--;