GFS2: Fix up REQ flags
Christoph has split up REQ_PRIO from REQ_META. That means that we can drop REQ_PRIO from places where is it not needed. I'm not at all sure that the combination WRITE_FLUSH_FUA | REQ_PRIO makes any kind of sense, anyway. In addition, I've added REQ_META to one place in the code where it was missing. REQ_PRIO has been left for read/writes triggered by glock acquisition and writeback only. We can adjust it again if required, but these are the most important points from a performance perspective. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Christoph Hellwig <hch@infradead.org>
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1ea6b8f489
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20ed0535d3
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@ -626,7 +626,7 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
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if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
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submit_bh(WRITE_SYNC | REQ_META | REQ_PRIO, bh);
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else
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submit_bh(WRITE_FLUSH_FUA | REQ_META | REQ_PRIO, bh);
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submit_bh(WRITE_FLUSH_FUA | REQ_META, bh);
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wait_on_buffer(bh);
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if (!buffer_uptodate(bh))
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@ -435,7 +435,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
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if (buffer_uptodate(first_bh))
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goto out;
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if (!buffer_locked(first_bh))
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ll_rw_block(READ_SYNC | REQ_META | REQ_PRIO, 1, &first_bh);
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ll_rw_block(READ_SYNC | REQ_META, 1, &first_bh);
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dblock++;
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extlen--;
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@ -444,7 +444,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
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bh = gfs2_getbuf(gl, dblock, CREATE);
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if (!buffer_uptodate(bh) && !buffer_locked(bh))
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ll_rw_block(READA, 1, &bh);
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ll_rw_block(READA | REQ_META, 1, &bh);
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brelse(bh);
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dblock++;
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extlen--;
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@ -224,7 +224,7 @@ static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent)
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bio->bi_end_io = end_bio_io_page;
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bio->bi_private = page;
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submit_bio(READ_SYNC | REQ_META | REQ_PRIO, bio);
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submit_bio(READ_SYNC | REQ_META, bio);
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wait_on_page_locked(page);
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bio_put(bio);
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if (!PageUptodate(page)) {
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@ -712,7 +712,7 @@ get_a_page:
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set_buffer_uptodate(bh);
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if (!buffer_uptodate(bh)) {
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ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &bh);
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ll_rw_block(READ | REQ_META, 1, &bh);
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wait_on_buffer(bh);
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if (!buffer_uptodate(bh))
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goto unlock_out;
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