[patch 088/104] jbd2: Fix buffer head leak when writing the commit block

Greg KH
2008-12-03T20:25:29Z

[-- Attachment #1: jbd2-fix-buffer-head-leak-when-writing-the-commit-block.patch --]
[-- Type: text/plain, Size: 1190 bytes --]

2.6.27-stable review patch. If anyone has any objections, please let us know.

------------------
From: "Theodore Ts'o" <tytso@mit.edu>

(cherry picked from commit 45a90bfd90c1215bf824c0f705b409723f52361b)

Also make sure the buffer heads are marked clean before submitting bh
for writing. The previous code was marking the buffer head dirty,
which would have forced an unneeded write (and seek) to the journal
for no good reason.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
fs/jbd2/commit.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -126,8 +126,7 @@ static int journal_submit_commit_record(

JBUFFER_TRACE(descriptor, "submit commit block");
lock_buffer(bh);
- get_bh(bh);
- set_buffer_dirty(bh);
+ clear_buffer_dirty(bh);
set_buffer_uptodate(bh);
bh->b_end_io = journal_end_buffer_io_sync;

@@ -160,7 +159,7 @@ static int journal_submit_commit_record(
/* And try again, without the barrier */
lock_buffer(bh);
set_buffer_uptodate(bh);
- set_buffer_dirty(bh);
+ clear_buffer_dirty(bh);
ret = submit_bh(WRITE, bh);
}
*cbh = bh;