linux.git/fs/jbd2, branch v2.6.32

JBD/JBD2: free j_wbuf if journal init fails.

2009-11-11T14:24:14+00:00

If journal init fails, we need to free j_wbuf.

Cc: Andrew Morton 
Cc: Jan Kara 
Signed-off-by: Tao Ma 
Signed-off-by: Jan Kara

const: constify remaining file_operations

2009-10-01T23:11:11+00:00

[akpm@linux-foundation.org: fix KVM]
Signed-off-by: Alexey Dobriyan 
Acked-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

jbd2: Use tracepoints for history file

2009-09-30T04:32:06+00:00

The /proc/fs/jbd2//history was maintained manually; by using
tracepoints, we can get all of the existing functionality of the /proc
file plus extra capabilities thanks to the ftrace infrastructure.  We
save memory as a bonus.

Signed-off-by: "Theodore Ts'o"

ext4, jbd2: Drop unneeded printks at mount and unmount time

2009-09-29T19:51:30+00:00

There are a number of kernel printk's which are printed when an ext4
filesystem is mounted and unmounted.  Disable them to economize space
in the system logs.  In addition, disabling the mballoc stats by
default saves a number of unneeded atomic operations for every block
allocation or deallocation.

Signed-off-by: "Theodore Ts'o"

seq_file: constify seq_operations

2009-09-23T14:39:29+00:00

Make all seq_operations structs const, to help mitigate against
revectoring user-triggerable function pointers.

This is derived from the grsecurity patch, although generated from scratch
because it's simpler than extracting the changes from there.

Signed-off-by: James Morris 
Acked-by: Serge Hallyn 
Acked-by: Casey Schaufler 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ext4: Fix async commit mode to be safe by using a barrier

2009-09-11T13:30:12+00:00

Previously the journal_async_commit mount option was equivalent to
using barrier=0 (and just as unsafe).  This patch fixes it so that we
eliminate the barrier before the commit block (by not using ordered
mode), and explicitly issuing an empty barrier bio after writing the
commit block.  Because of the journal checksum, it is safe to do this;
if the journal blocks are not all written before a power failure, the
checksum in the commit block will prevent the last transaction from
being replayed.

Using the fs_mark benchmark, using journal_async_commit shows a 50%
improvement:

FSUse%        Count         Size    Files/sec     App Overhead
     8         1000        10240         30.5            28242

vs.

FSUse%        Count         Size    Files/sec     App Overhead
     8         1000        10240         45.8            28620


Signed-off-by: "Theodore Ts'o"

jbd2: Annotate transaction start also for jbd2_journal_restart()

2009-08-18T01:23:17+00:00

lockdep annotation for a transaction start has been at the end of
jbd2_journal_start(). But a transaction is also started from
jbd2_journal_restart(). Move the lockdep annotation to start_this_handle()
which covers both cases.

Signed-off-by: Jan Kara 
Signed-off-by: "Theodore Ts'o"

jbd2: round commit timer up to avoid uncommitted transaction

2009-08-11T02:51:53+00:00

fix jiffie rounding in jbd commit timer setup code.  Rounding down
could cause the timer to be fired before the corresponding transaction
has expired.  That transaction can stay not committed forever if no
new transaction is created or expicit sync/umount happens.

Signed-off-by: Alex Zhuravlev (Tomas) 
Signed-off-by: Andreas Dilger 
Signed-off-by: "Theodore Ts'o"

jbd2: Fail to load a journal if it is too short

2009-07-17T14:40:01+00:00

Due to on disk corruption, it can happen that journal is too short. Fail
to load it in such case so that we don't oops somewhere later.

Signed-off-by: Jan Kara 
Signed-off-by: "Theodore Ts'o"

writeback: get rid of wbc->for_writepages

2009-09-16T13:16:18+00:00

It's only set, it's never checked. Kill it.

Acked-by: Jan Kara 
Signed-off-by: Jens Axboe