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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-03 20:56:25 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-03 20:56:25 +0400 |
| commit | 14a9e5c09d13aa36b88ea54b8b6134b60ff2a410 (patch) | |
| tree | 4c8c477d4e459bd3429b83a81e3db531ffe32969 /fs/jbd/journal.c | |
| parent | 8546dc1d4b671480961c3eaf4c0c102ae6848340 (diff) | |
| parent | fb1c2d8294a60184a151ff12182446d7b930ed95 (diff) | |
| download | linux-14a9e5c09d13aa36b88ea54b8b6134b60ff2a410.tar.xz | |
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.c | 19 |
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)) { |