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| author |   OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | 2006-10-19 23:29:11 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-20 10:26:44 -0700 |
| commit | 3e2a532b26b491706bd8b5c7cfc8d767b43b8f36 (patch) | |
| tree | 641db5da4c1adbeee04ce6594746cec51f581ff0 /fs/jbd/transaction.c | |
| parent | [PATCH] mm: more commenting on lock ordering (diff) | |
| download | linux-dev-3e2a532b26b491706bd8b5c7cfc8d767b43b8f36.tar.xz linux-dev-3e2a532b26b491706bd8b5c7cfc8d767b43b8f36.zip | |
[PATCH] ext3/4: fix J_ASSERT(transaction->t_updates > 0) in journal_stop()
A disk generated some I/O error, after it, I hitted
J_ASSERT(transaction->t_updates > 0) in journal_stop().
It seems to happened on ext3_truncate() path from stack trace. Then,
maybe the following case may trigger J_ASSERT(transaction->t_updates > 0).
ext3_truncate()
-> ext3_free_branches()
-> ext3_journal_test_restart()
-> ext3_journal_restart()
-> journal_restart()
transaction->t_updates--;
/* another process aborted journal */
-> start_this_handle()
returns -EROFS without transaction->t_updates++;
-> ext3_journal_stop()
-> journal_stop()
J_ASSERT(transaction->t_updates > 0)
If journal was aborted in middle of journal_restart(), ext3_truncate()
may trigger J_ASSERT().
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/jbd/transaction.c')
| -rw-r--r-- | fs/jbd/transaction.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c index e1b3c8af4d17..d5c63047a8b3 100644 --- a/fs/jbd/transaction.c +++ b/fs/jbd/transaction.c @@ -1314,13 +1314,14 @@ int journal_stop(handle_t *handle) int old_handle_count, err; pid_t pid; - J_ASSERT(transaction->t_updates > 0); J_ASSERT(journal_current_handle() == handle); if (is_handle_aborted(handle)) err = -EIO; - else + else { + J_ASSERT(transaction->t_updates > 0); err = 0; + } if (--handle->h_ref > 0) { jbd_debug(4, "h_ref %d -> %d\n", handle->h_ref + 1, |