lwn.git/fs/jbd2/commit.c, branch v2.6.27.40

jbd2: Add barrier not supported test to journal_wait_on_commit_record

2009-02-20T22:37:01+00:00

(cherry picked from commit fd98496f467b3d26d05ab1498f41718b5ef13de5) Xen doesn't report that barriers are not supported until buffer I/O is reported as completed, instead of when the buffer I/O is submitted. Add a check and a fallback codepath to journal_wait_on_commit_record() to detect this case, so that attempts to mount ext4 filesystems on LVM/devicemapper devices on Xen guests don't blow up with an "Aborting journal on device XXX"; "Remounting filesystem read-only" error. Thanks to Andreas Sundstrom for reporting this issue. Signed-off-by: "Theodore Ts'o" Signed-off-by: Greg Kroah-Hartman

jbd2: Fix buffer head leak when writing the commit block

2008-12-05T18:55:41+00:00

(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" Signed-off-by: Greg Kroah-Hartman

mm: rename page trylock

2008-08-05T04:31:34+00:00

Converting page lock to new locking bitops requires a change of page flag operation naming, so we might as well convert it to something nicer (!TestSetPageLocked_Lock => trylock_page, SetPageLocked => set_page_locked). This also facilitates lockdeping of page lock. Signed-off-by: Nick Piggin Acked-by: KOSAKI Motohiro Acked-by: Peter Zijlstra Acked-by: Andrew Morton Acked-by: Benjamin Herrenschmidt Signed-off-by: Linus Torvalds

jbd2: don't abort if flushing file data failed

2008-08-01T02:26:04+00:00

In ordered mode, the current jbd2 aborts the journal if a file data buffer has an error. But this behavior is unintended, and we found that it has been adopted accidentally. This patch undoes it and just calls printk() instead of aborting the journal. Unlike a similar patch for ext3/jbd, file data buffers are written via generic_writepages(). But we also need to set AS_EIO into their mappings because wait_on_page_writeback_range() clears AS_EIO before a user process sees it. Signed-off-by: Hidehiro Kawai Signed-off-by: "Theodore Ts'o"

ext4: Add ordered mode support for delalloc

2008-07-11T23:27:31+00:00

This provides a new ordered mode implementation which gets rid of using buffer heads to enforce the ordering between metadata change with the related data chage. Instead, in the new ordering mode, it keeps track of all of the inodes touched by each transaction on a list, and when that transaction is committed, it flushes all of the dirty pages for those inodes. In addition, the new ordered mode reverses the lock ordering of the page lock and transaction lock, which provides easier support for delayed allocation. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o"

jbd2: Remove data=ordered mode support using jbd buffer heads

2008-07-11T23:27:31+00:00

Signed-off-by: Jan Kara

jbd2: Implement data=ordered mode handling via inodes

2008-07-11T23:27:31+00:00

This patch adds necessary framework into JBD2 to be able to track inodes with each transaction and write-out their dirty data during transaction commit time. This new ordered mode brings all sorts of advantages such as possibility to get rid of journal heads and buffer heads for data buffers in ordered mode, better ordering of writes on transaction commit, simplification of some JBD code, no more anonymous pages when truncate of data being committed happens. Also with this new ordered mode, delayed allocation on ordered mode is much simpler. Signed-off-by: Jan Kara

jbd2: Add commit time into the commit block

2008-07-11T23:27:31+00:00

Carlo Wood has demonstrated that it's possible to recover deleted files from the journal. Something that will make this easier is if we can put the time of the commit into commit block. Signed-off-by: "Theodore Ts'o"

jbd2: Fix barrier fallback code to re-lock the buffer head

2008-06-04T02:31:11+00:00

If the device doesn't support write barriers, the write is retried without ordered mode. But the buffer head needs to be re-locked or submit_bh will fail with on BUG(!buffer_locked(bh)). Signed-off-by: "Theodore Ts'o"

jbd2: update transaction t_state to T_COMMIT fix

2008-05-15T18:46:17+00:00

Updating the current transaction's t_state is protected by j_state_lock. We need to do the same when updating the t_state to T_COMMIT. Acked-by: Jan Kara Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o" Signed-off-by: Andrew Morton