tree b62700cd7ff65268a50cfd8d8652d220f7c5c9a4
parent c806e68f5647109350ec546fee5b526962970fd2
author Duane Griffin <duaneg@dghda.com> 1223522911 -0400
committer Theodore Ts'o <tytso@mit.edu> 1223522911 -0400

jbd2: abort instead of waiting for nonexistent transaction

The __jbd2_log_wait_for_space function sits in a loop checkpointing
transactions until there is sufficient space free in the journal. 
However, if there are no transactions to be processed (e.g.  because the
free space calculation is wrong due to a corrupted filesystem) it will
never progress.

Check for space being required when no transactions are outstanding and
abort the journal instead of endlessly looping.

This patch fixes the bug reported by Sami Liedes at:
http://bugzilla.kernel.org/show_bug.cgi?id=10976

Signed-off-by: Duane Griffin <duaneg@dghda.com>
Cc: Sami Liedes <sliedes@cc.hut.fi>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>