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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-03 09:56:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-03 09:56:25 -0700
commit14a9e5c09d13aa36b88ea54b8b6134b60ff2a410 (patch)
tree4c8c477d4e459bd3429b83a81e3db531ffe32969 /fs/jbd/journal.c
parent8546dc1d4b671480961c3eaf4c0c102ae6848340 (diff)
parentfb1c2d8294a60184a151ff12182446d7b930ed95 (diff)
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext3/jbd fixes from Jan Kara: "A couple of ext3/jbd fixes" * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: jbd: use kmem_cache_zalloc for allocating journal head jbd: use kmem_cache_zalloc instead of kmem_cache_alloc/memset jbd: don't wait (forever) for stale tid caused by wraparound ext3: fix data=journal fast mount/umount hang
Diffstat (limited to 'fs/jbd/journal.c')
-rw-r--r--fs/jbd/journal.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index 865c4308acb6..6510d6355729 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -562,6 +562,16 @@ int log_wait_commit(journal_t *journal, tid_t tid)
spin_unlock(&journal->j_state_lock);
#endif
spin_lock(&journal->j_state_lock);
+ /*
+ * Not running or committing trans? Must be already committed. This
+ * saves us from waiting for a *long* time when tid overflows.
+ */
+ if (!((journal->j_running_transaction &&
+ journal->j_running_transaction->t_tid == tid) ||
+ (journal->j_committing_transaction &&
+ journal->j_committing_transaction->t_tid == tid)))
+ goto out_unlock;
+
if (!tid_geq(journal->j_commit_waited, tid))
journal->j_commit_waited = tid;
while (tid_gt(tid, journal->j_commit_sequence)) {
@@ -573,6 +583,7 @@ int log_wait_commit(journal_t *journal, tid_t tid)
!tid_gt(tid, journal->j_commit_sequence));
spin_lock(&journal->j_state_lock);
}
+out_unlock:
spin_unlock(&journal->j_state_lock);
if (unlikely(is_journal_aborted(journal))) {
@@ -1843,7 +1854,7 @@ static struct journal_head *journal_alloc_journal_head(void)
#ifdef CONFIG_JBD_DEBUG
atomic_inc(&nr_journal_heads);
#endif
- ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
+ ret = kmem_cache_zalloc(journal_head_cache, GFP_NOFS);
if (ret == NULL) {
jbd_debug(1, "out of memory for journal_head\n");
printk_ratelimited(KERN_NOTICE "ENOMEM in %s, retrying.\n",
@@ -1851,7 +1862,7 @@ static struct journal_head *journal_alloc_journal_head(void)
while (ret == NULL) {
yield();
- ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
+ ret = kmem_cache_zalloc(journal_head_cache, GFP_NOFS);
}
}
return ret;
@@ -1913,10 +1924,8 @@ struct journal_head *journal_add_journal_head(struct buffer_head *bh)
struct journal_head *new_jh = NULL;
repeat:
- if (!buffer_jbd(bh)) {
+ if (!buffer_jbd(bh))
new_jh = journal_alloc_journal_head();
- memset(new_jh, 0, sizeof(*new_jh));
- }
jbd_lock_bh_journal_head(bh);
if (buffer_jbd(bh)) {