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Leave superblocks on s_list until the end

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We used to remove from s_list and s_instances at the same
time.  So let's *not* do the former and skip superblocks
that have empty s_instances in the loops over s_list.

The next step, of course, will be to get rid of rescan logics
in those loops.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2010-03-22 19:36:35 -04:00
parent 1712ac8fda
commit 551de6f34d
6 changed files with 25 additions and 4 deletions
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5
fs/sync.c
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@@ -99,10 +99,13 @@ static void sync_filesystems(int wait)
mutex_lock(&mutex); /* Could be down_interruptible */
spin_lock(&sb_lock);
list_for_each_entry(sb, &super_blocks, s_list)
sb->s_need_sync = 1;
if (!list_empty(&sb->s_instances))
sb->s_need_sync = 1;
restart:
list_for_each_entry(sb, &super_blocks, s_list) {
if (list_empty(&sb->s_instances))
continue;
if (!sb->s_need_sync)
continue;
sb->s_need_sync = 0;