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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>
This commit is contained in:
Artem Bityutskiy 2008-12-28 08:16:32 +02:00
parent 304d427cd9
commit f10383006c
1 changed files with 18 additions and 20 deletions
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38
fs/ubifs/super.c
View File

@ -429,9 +429,8 @@ static int ubifs_show_options(struct seq_file *s, struct vfsmount *mnt)
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 @@ static int ubifs_sync_fs(struct super_block *sb, int wait)
.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 @@ static int ubifs_sync_fs(struct super_block *sb, int wait)
*/
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;
}
/**