[GFS2] Reduce inode size by merging fields
There were three fields being used to keep track of the location
of the most recently allocated block for each inode. These have
been merged into a single field in order to better keep the
data and metadata for an inode close on disk, and also to reduce
the space required for storage.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 3f10b1f..66193b4 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -915,24 +915,20 @@
static struct gfs2_rgrpd *recent_rgrp_first(struct gfs2_sbd *sdp,
u64 rglast)
{
- struct gfs2_rgrpd *rgd = NULL;
+ struct gfs2_rgrpd *rgd;
spin_lock(&sdp->sd_rindex_spin);
- if (list_empty(&sdp->sd_rindex_recent_list))
- goto out;
-
- if (!rglast)
- goto first;
-
- list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) {
- if (rgd->rd_addr == rglast)
- goto out;
+ if (rglast) {
+ list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) {
+ if (rgrp_contains_block(rgd, rglast))
+ goto out;
+ }
}
-
-first:
- rgd = list_entry(sdp->sd_rindex_recent_list.next, struct gfs2_rgrpd,
- rd_recent);
+ rgd = NULL;
+ if (!list_empty(&sdp->sd_rindex_recent_list))
+ rgd = list_entry(sdp->sd_rindex_recent_list.next,
+ struct gfs2_rgrpd, rd_recent);
out:
spin_unlock(&sdp->sd_rindex_spin);
return rgd;
@@ -1078,7 +1074,7 @@
/* Try recently successful rgrps */
- rgd = recent_rgrp_first(sdp, ip->i_last_rg_alloc);
+ rgd = recent_rgrp_first(sdp, ip->i_goal);
while (rgd) {
rg_locked = 0;
@@ -1162,8 +1158,6 @@
}
out:
- ip->i_last_rg_alloc = rgd->rd_addr;
-
if (begin) {
recent_rgrp_add(rgd);
rgd = gfs2_rgrpd_get_next(rgd);
@@ -1425,8 +1419,8 @@
u32 goal, blk;
u64 block;
- if (rgrp_contains_block(rgd, ip->i_di.di_goal_data))
- goal = ip->i_di.di_goal_data - rgd->rd_data0;
+ if (rgrp_contains_block(rgd, ip->i_goal))
+ goal = ip->i_goal - rgd->rd_data0;
else
goal = rgd->rd_last_alloc_data;
@@ -1435,7 +1429,7 @@
rgd->rd_last_alloc_data = blk;
block = rgd->rd_data0 + blk;
- ip->i_di.di_goal_data = block;
+ ip->i_goal = block;
gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
rgd->rd_rg.rg_free--;
@@ -1470,8 +1464,8 @@
u32 goal, blk;
u64 block;
- if (rgrp_contains_block(rgd, ip->i_di.di_goal_meta))
- goal = ip->i_di.di_goal_meta - rgd->rd_data0;
+ if (rgrp_contains_block(rgd, ip->i_goal))
+ goal = ip->i_goal - rgd->rd_data0;
else
goal = rgd->rd_last_alloc_meta;
@@ -1480,7 +1474,7 @@
rgd->rd_last_alloc_meta = blk;
block = rgd->rd_data0 + blk;
- ip->i_di.di_goal_meta = block;
+ ip->i_goal = block;
gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
rgd->rd_rg.rg_free--;