linux-ext4 - Re: [PATCH] ext3: call ext3_mark_recovery_complete() when recovery is really needed

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Date:	Thu, 3 Nov 2011 02:35:51 +0100
From:	Jan Kara <jack@...e.cz>
To:	Eryu Guan <guaneryu@...il.com>
Cc:	Jan Kara <jack@...e.cz>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext3: call ext3_mark_recovery_complete() when recovery
 is really needed

On Wed 02-11-11 22:04:54, Eryu Guan wrote:
> On Wed, Nov 2, 2011 at 6:43 AM, Jan Kara <jack@...e.cz> wrote:
> > On Tue 01-11-11 10:06:19, Eryu Guan wrote:
> >> Call ext3_mark_recovery_complete() in ext3_fill_super() only if
> >> needs_recovery is non-zero.
> >>
> >> Besides that, print out "recovery complete" message after calling
> >> ext3_mark_recovery_complete().
> >  OK, I don't see a problem in this patch. But is there some benefit in it?
> > I'm slightly nervous it could change something subtle...
> 
> I think current code may confuse people. The variable 'needs_recovery' in
> ext3_fill_super() only be used in this 'if' switch, but all the 'if'
> does is printing
> out a log message and no matter what value 'needs_recovery' is,
> ext3_mark_recovery_complete() is always being called.
> 
> This change makes the logic more clear and of course reduce a little overhead
> when mounting clean fs.
> 
> This change also consists with ext4 counter part
> 3733         if (needs_recovery) {
> 3734                 ext4_msg(sb, KERN_INFO, "recovery complete");
> 3735                 ext4_mark_recovery_complete(sb, es);
> 3736         }
  OK, consistency with ext4 makes sense. I'll take the patch. Thanks.

								Honza

> >> Cc: Jan Kara <jack@...e.cz>
> >> Signed-off-by: Eryu Guan <guaneryu@...il.com>
> >> ---
> >>  fs/ext3/super.c |    5 +++--
> >>  1 files changed, 3 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/fs/ext3/super.c b/fs/ext3/super.c
> >> index 7beb69a..2681e0d 100644
> >> --- a/fs/ext3/super.c
> >> +++ b/fs/ext3/super.c
> >> @@ -2060,9 +2060,10 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
> >>       EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
> >>       ext3_orphan_cleanup(sb, es);
> >>       EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
> >> -     if (needs_recovery)
> >> +     if (needs_recovery) {
> >> +             ext3_mark_recovery_complete(sb, es);
> >>               ext3_msg(sb, KERN_INFO, "recovery complete");
> >> -     ext3_mark_recovery_complete(sb, es);
> >> +     }
> >>       ext3_msg(sb, KERN_INFO, "mounted filesystem with %s data mode",
> >>               test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
> >>               test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
> >> --
> >> 1.7.7.1
> >>
> > --
> > Jan Kara <jack@...e.cz>
> > SUSE Labs, CR
> >
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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