linux-ext4 - Re: [PATCH 0/2] Fix sending of a barrier and transaction waiting in ext4_sync

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Message-ID: <20110519105149.GC8417@quack.suse.cz>
Date:	Thu, 19 May 2011 12:51:49 +0200
From:	Jan Kara <jack@...e.cz>
To:	"Darrick J. Wong" <djwong@...ibm.com>
Cc:	Jan Kara <jack@...e.cz>, tytso@....edu,
	Edward Goggin <egoggin@...are.com>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 0/2] Fix sending of a barrier and transaction waiting
 in ext4_sync_file()

On Wed 18-05-11 10:43:27, Darrick J. Wong wrote:
> On Tue, May 17, 2011 at 12:28:13PM +0200, Jan Kara wrote:
> > 
> >   Hi Ted,
> > 
> >   the two patches below fix ext4_sync_file() to wait for a transaction commit
> > properly (return value of jbd2_log_start_commit() is not exactly what
> > ext4_sync_file() thinks it is). It also optimizes / fixes sending of a barrier
> > in some cases (e.g. in ordered mode with external journal we cannot really
> > depend on transaction commit to issue a barrier to fs device because we don't
> > seem to add inode to a transaction for overwrites).
> 
> Probably a silly nit to pick, but do you mean "flush" instead of "barrier"?
  Oh, right. I mean flush :). Thanks.

									Honza

> > I already fixed ext3 in this regard some time ago but didn't get to porting the
> > patches to ext4. 
> > 
> > 									Honza
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