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UBIFS: increment commit number earlier

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Increment the commit number at the beginnig of the commit, instead
of doing this after the commit. This is needed for further
optimizations.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2008-07-21 17:14:29 +03:00
parent fd6c6b51e3
commit 014eb04b03
4 changed files with 7 additions and 5 deletions
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3
fs/ubifs/commit.c
View file

@ -74,6 +74,7 @@ static int do_commit(struct ubifs_info *c)
goto out_up;
}
c->cmt_no += 1;
err = ubifs_gc_start_commit(c);
if (err)
goto out_up;
@ -115,7 +116,7 @@ static int do_commit(struct ubifs_info *c)
goto out;
mutex_lock(&c->mst_mutex);
c->mst_node->cmt_no = cpu_to_le64(++c->cmt_no);
c->mst_node->cmt_no = cpu_to_le64(c->cmt_no);
c->mst_node->log_lnum = cpu_to_le32(new_ltail_lnum);
c->mst_node->root_lnum = cpu_to_le32(zroot.lnum);
c->mst_node->root_offs = cpu_to_le32(zroot.offs);

2
fs/ubifs/log.c
View file

@ -412,7 +412,7 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
return -ENOMEM;
cs->ch.node_type = UBIFS_CS_NODE;
cs->cmt_no = cpu_to_le64(c->cmt_no + 1);
cs->cmt_no = cpu_to_le64(c->cmt_no);
ubifs_prepare_node(c, cs, UBIFS_CS_NODE_SZ, 0);
/*

4
fs/ubifs/orphan.c
View file

@ -310,10 +310,10 @@ static int write_orph_node(struct ubifs_info *c, int atomic)
c->cmt_orphans -= cnt;
spin_unlock(&c->orphan_lock);
if (c->cmt_orphans)
orph->cmt_no = cpu_to_le64(c->cmt_no + 1);
orph->cmt_no = cpu_to_le64(c->cmt_no);
else
/* Mark the last node of the commit */
orph->cmt_no = cpu_to_le64((c->cmt_no + 1) | (1ULL << 63));
orph->cmt_no = cpu_to_le64((c->cmt_no) | (1ULL << 63));
ubifs_assert(c->ohead_offs + len <= c->leb_size);
ubifs_assert(c->ohead_lnum >= c->orph_first);
ubifs_assert(c->ohead_lnum <= c->orph_last);

3
fs/ubifs/ubifs.h
View file

@ -865,7 +865,8 @@ struct ubifs_mount_opts {
* @highest_inum: highest used inode number
* @vfs_gen: VFS inode generation counter
* @max_sqnum: current global sequence number
* @cmt_no: commit number (last successfully completed commit)
* @cmt_no: commit number of the last successfully completed commit, protected
* by @commit_sem
* @cnt_lock: protects @highest_inum, @vfs_gen, and @max_sqnum counters
* @fmt_version: UBIFS on-flash format version
* @uuid: UUID from super block