UBIFS: always commit in sync_fs
Always run commit in sync_fs, because even if the journal seems
to be almost empty, there may be a deletion which removes a large
file, which affects the index greatly. And because we want
better free space predictions after 'sync_fs()', we have to
commit.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 4713017..ee8e774 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -429,9 +429,8 @@
static int ubifs_sync_fs(struct super_block *sb, int wait)
{
+ int i, err;
struct ubifs_info *c = sb->s_fs_info;
- int i, ret = 0, err;
- long long bud_bytes;
struct writeback_control wbc = {
.sync_mode = wait ? WB_SYNC_ALL : WB_SYNC_HOLD,
.range_start = 0,
@@ -439,6 +438,19 @@
.nr_to_write = LONG_MAX,
};
+ if (sb->s_flags & MS_RDONLY)
+ return 0;
+
+ /*
+ * Synchronize write buffers, because 'ubifs_run_commit()' does not
+ * do this if it waits for an already running commit.
+ */
+ for (i = 0; i < c->jhead_cnt; i++) {
+ err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
+ if (err)
+ return err;
+ }
+
/*
* VFS calls '->sync_fs()' before synchronizing all dirty inodes and
* pages, so synchronize them first, then commit the journal. Strictly
@@ -450,30 +462,16 @@
*/
generic_sync_sb_inodes(sb, &wbc);
- if (c->jheads) {
- for (i = 0; i < c->jhead_cnt; i++) {
- err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
- if (err && !ret)
- ret = err;
- }
-
- /* Commit the journal unless it has too little data */
- spin_lock(&c->buds_lock);
- bud_bytes = c->bud_bytes;
- spin_unlock(&c->buds_lock);
- if (bud_bytes > c->leb_size) {
- err = ubifs_run_commit(c);
- if (err)
- return err;
- }
- }
+ err = ubifs_run_commit(c);
+ if (err)
+ return err;
/*
* We ought to call sync for c->ubi but it does not have one. If it had
* it would in turn call mtd->sync, however mtd operations are
* synchronous anyway, so we don't lose any sleep here.
*/
- return ret;
+ return err;
}
/**