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| author | Kent Overstreet <kmo@daterainc.com> | 2014-06-02 22:39:44 (GMT) |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2014-08-04 22:23:03 (GMT) |
| commit | 6b708de64adb6dc8319e7aeac922b46904fbeeec (patch) | |
| tree | 84aaf50c2b5b46e669315caf2fd32f143145f2f5 | |
| parent | 913dc33fb2720fb5f979011664294137ddd8b13b (diff) | |
| download | linux-6b708de64adb6dc8319e7aeac922b46904fbeeec.tar.xz | |
bcache: Fix an infinite loop in journal replay
When running with multiple cache devices, if one of the devices has a completely
empty journal but we'd already found some journal entries on a previosu device
we'd go into an infinite loop.
Change-Id: I1dcdc0d738192746de28f40e8b08825b0dea5e2b
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
| -rw-r--r-- | drivers/md/bcache/journal.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c index ead001c..fe080ad 100644 --- a/drivers/md/bcache/journal.c +++ b/drivers/md/bcache/journal.c @@ -190,9 +190,12 @@ int bch_journal_read(struct cache_set *c, struct list_head *list) if (read_bucket(l)) goto bsearch; - if (list_empty(list)) + /* no journal entries on this device? */ + if (l == ca->sb.njournal_buckets) continue; bsearch: + BUG_ON(list_empty(list)); + /* Binary search */ m = l; r = find_next_bit(bitmap, ca->sb.njournal_buckets, l + 1); |