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-rw-r--r--Documentation/filesystems/ocfs2.txt4
-rw-r--r--fs/ocfs2/ocfs2.h2
-rw-r--r--fs/ocfs2/super.c17
3 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt
index 7618a287aa41..28f8c08201e2 100644
--- a/Documentation/filesystems/ocfs2.txt
+++ b/Documentation/filesystems/ocfs2.txt
@@ -100,3 +100,7 @@ coherency=full (*) Disallow concurrent O_DIRECT writes, cluster inode
coherency=buffered Allow concurrent O_DIRECT writes without EX lock among
nodes, which gains high performance at risk of getting
stale data on other nodes.
+journal_async_commit Commit block can be written to disk without waiting
+ for descriptor blocks. If enabled older kernels cannot
+ mount the device. This will enable 'journal_checksum'
+ internally.
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 7d6b7d090452..fdbcbfed529e 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -279,6 +279,8 @@ enum ocfs2_mount_options
writes */
OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
+
+ OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */
};
#define OCFS2_OSB_SOFT_RO 0x0001
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 83723179e1ec..c09d6da23c3d 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -191,6 +191,7 @@ enum {
Opt_coherency_full,
Opt_resv_level,
Opt_dir_resv_level,
+ Opt_journal_async_commit,
Opt_err,
};
@@ -222,6 +223,7 @@ static const match_table_t tokens = {
{Opt_coherency_full, "coherency=full"},
{Opt_resv_level, "resv_level=%u"},
{Opt_dir_resv_level, "dir_resv_level=%u"},
+ {Opt_journal_async_commit, "journal_async_commit"},
{Opt_err, NULL}
};
@@ -1500,6 +1502,9 @@ static int ocfs2_parse_options(struct super_block *sb,
option < OCFS2_MAX_RESV_LEVEL)
mopt->dir_resv_level = option;
break;
+ case Opt_journal_async_commit:
+ mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
+ break;
default:
mlog(ML_ERROR,
"Unrecognized mount option \"%s\" "
@@ -1606,6 +1611,9 @@ static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
if (osb->osb_dir_resv_level != osb->osb_resv_level)
seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
+ if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
+ seq_printf(s, ",journal_async_commit");
+
return 0;
}
@@ -2475,6 +2483,15 @@ static int ocfs2_check_volume(struct ocfs2_super *osb)
goto finally;
}
+ if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
+ jbd2_journal_set_features(osb->journal->j_journal,
+ JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+ JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+ else
+ jbd2_journal_clear_features(osb->journal->j_journal,
+ JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+ JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+
if (dirty) {
/* recover my local alloc if we didn't unmount cleanly. */
status = ocfs2_begin_local_alloc_recovery(osb,