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[GFS2] Readpages support

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This adds readpages support (and also corrects a small bug in
the readpage error path at the same time). Hopefully this will
improve performance by allowing GFS to submit larger lumps of
I/O at a time.

In order to simplify the setting of BH_Boundary, it currently gets
set when we hit the end of a indirect pointer block. There is
always a boundary at this point with the current allocation code.
It doesn't get all the boundaries right though, so there is still
room for improvement in this.

See comments in fs/gfs2/ops_address.c for further information about
readpages with GFS2.

Signed-off-by: Steven Whitehouse
This commit is contained in:
Steven Whitehouse
2006-05-05 16:59:11 -04:00
parent 5bb76af1e0
commit fd88de569b
13 changed files with 254 additions and 129 deletions
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15
fs/gfs2/rgrp.c
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@@ -956,8 +956,7 @@ static uint32_t rgblk_search(struct gfs2_rgrpd *rgd, uint32_t goal,
search in the first part of our first-searched bit block. */
for (x = 0; x <= length; x++) {
if (bi->bi_clone)
blk = gfs2_bitfit(rgd,
bi->bi_clone + bi->bi_offset,
blk = gfs2_bitfit(rgd, bi->bi_clone + bi->bi_offset,
bi->bi_len, goal, old_state);
else
blk = gfs2_bitfit(rgd,
@@ -976,12 +975,10 @@ static uint32_t rgblk_search(struct gfs2_rgrpd *rgd, uint32_t goal,
blk = 0;
gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
gfs2_setbit(rgd,
bi->bi_bh->b_data + bi->bi_offset,
gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
bi->bi_len, blk, new_state);
if (bi->bi_clone)
gfs2_setbit(rgd,
bi->bi_clone + bi->bi_offset,
gfs2_setbit(rgd, bi->bi_clone + bi->bi_offset,
bi->bi_len, blk, new_state);
return bi->bi_start * GFS2_NBBY + blk;
@@ -1064,8 +1061,7 @@ uint64_t gfs2_alloc_data(struct gfs2_inode *ip)
else
goal = rgd->rd_last_alloc_data;
blk = rgblk_search(rgd, goal,
GFS2_BLKST_FREE, GFS2_BLKST_USED);
blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
rgd->rd_last_alloc_data = blk;
block = rgd->rd_ri.ri_data0 + blk;
@@ -1109,8 +1105,7 @@ uint64_t gfs2_alloc_meta(struct gfs2_inode *ip)
else
goal = rgd->rd_last_alloc_meta;
blk = rgblk_search(rgd, goal,
GFS2_BLKST_FREE, GFS2_BLKST_USED);
blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
rgd->rd_last_alloc_meta = blk;
block = rgd->rd_ri.ri_data0 + blk;