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authorAndreas Gruenbacher <agruenba@redhat.com>2018-06-21 15:42:37 +0300
committerAndreas Gruenbacher <agruenba@redhat.com>2018-07-05 18:47:16 +0300
commitb7eba890a228f591fea2889b901267ba5de7839b (patch)
treee05207ea69e56da2ccf10b50d02f7666c1ee62be /fs/gfs2
parent03f8c41c73da849ec2b73aa678ce6380e8318920 (diff)
downloadlinux-b7eba890a228f591fea2889b901267ba5de7839b.tar.xz
gfs2: Eliminate redundant ip->i_rgd
GFS2 remembers the last rgrp used for allocations in ip->i_rgd. However, block allocations are made by way of a reservations structure, ip->i_res, which keeps the last rgrp in ip->i_res.rs_rgd, and ip->i_res is kept in sync with ip->i_res.rs_rgd, so it's redundant. Get rid of ip->i_rgd and just use ip->i_res.rs_rgd in its place. Based on patches by Robert Peterson. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/incore.h1
-rw-r--r--fs/gfs2/rgrp.c13
-rw-r--r--fs/gfs2/super.c1
-rw-r--r--fs/gfs2/trans.h6
4 files changed, 10 insertions, 11 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index e9cd2cc292d3..b50908211b69 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -397,7 +397,6 @@ struct gfs2_inode {
struct gfs2_holder i_gh; /* for prepare/commit_write only */
struct gfs2_qadata *i_qadata; /* quota allocation data */
struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
- struct gfs2_rgrpd *i_rgd;
u64 i_goal; /* goal block for allocations */
struct rw_semaphore i_rw_mutex;
struct list_head i_ordered;
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index ecdc4cb5b6ad..60c86532782e 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1992,8 +1992,9 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, struct gfs2_alloc_parms *ap)
return -EINVAL;
if (gfs2_rs_active(rs)) {
begin = rs->rs_rbm.rgd;
- } else if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, ip->i_goal)) {
- rs->rs_rbm.rgd = begin = ip->i_rgd;
+ } else if (rs->rs_rbm.rgd &&
+ rgrp_contains_block(rs->rs_rbm.rgd, ip->i_goal)) {
+ begin = rs->rs_rbm.rgd;
} else {
check_and_update_goal(ip);
rs->rs_rbm.rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1);
@@ -2057,8 +2058,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, struct gfs2_alloc_parms *ap)
if (rs->rs_rbm.rgd->rd_free_clone >= ap->target ||
(loops == 2 && ap->min_target &&
rs->rs_rbm.rgd->rd_free_clone >= ap->min_target)) {
- ip->i_rgd = rs->rs_rbm.rgd;
- ap->allowed = ip->i_rgd->rd_free_clone;
+ ap->allowed = rs->rs_rbm.rgd->rd_free_clone;
return 0;
}
check_rgrp:
@@ -2336,7 +2336,7 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct buffer_head *dibh;
- struct gfs2_rbm rbm = { .rgd = ip->i_rgd, };
+ struct gfs2_rbm rbm = { .rgd = ip->i_res.rs_rbm.rgd, };
unsigned int ndata;
u64 block; /* block, within the file system scope */
int error;
@@ -2569,7 +2569,7 @@ void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
return;
rgd = gfs2_blk2rgrpd(sdp, block, 1);
} else {
- rgd = ip->i_rgd;
+ rgd = ip->i_res.rs_rbm.rgd;
if (!rgd || !rgrp_contains_block(rgd, block))
rgd = gfs2_blk2rgrpd(sdp, block, 1);
}
@@ -2579,7 +2579,6 @@ void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
(unsigned long long)block);
return;
}
- ip->i_rgd = rgd;
for (x = 0; x < rlist->rl_rgrps; x++) {
if (rlist->rl_rgd[x] == rgd) {
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index cf5c7f3080d2..685dc6fff5ed 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1729,7 +1729,6 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
if (ip) {
ip->i_flags = 0;
ip->i_gl = NULL;
- ip->i_rgd = NULL;
memset(&ip->i_res, 0, sizeof(ip->i_res));
RB_CLEAR_NODE(&ip->i_res.rs_node);
ip->i_rahead = 0;
diff --git a/fs/gfs2/trans.h b/fs/gfs2/trans.h
index 1e6e7da25a17..ad70087d0597 100644
--- a/fs/gfs2/trans.h
+++ b/fs/gfs2/trans.h
@@ -30,9 +30,11 @@ struct gfs2_glock;
* block, or all of the blocks in the rg, whichever is smaller */
static inline unsigned int gfs2_rg_blocks(const struct gfs2_inode *ip, unsigned requested)
{
- if (requested < ip->i_rgd->rd_length)
+ struct gfs2_rgrpd *rgd = ip->i_res.rs_rbm.rgd;
+
+ if (requested < rgd->rd_length)
return requested + 1;
- return ip->i_rgd->rd_length;
+ return rgd->rd_length;
}
extern int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,