linux-ext4 - Re: [RFC][PATCH 4/6] delalloc ENOSPC: avoid free blocks double booking

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Message-ID: <20080602075934.GA29995@skywalker>
Date:	Mon, 2 Jun 2008 13:29:34 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Mingming Cao <cmm@...ibm.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [RFC][PATCH 4/6] delalloc ENOSPC: avoid free blocks  double
	booking

On Mon, Jun 02, 2008 at 12:12:36AM -0700, Mingming Cao wrote:
> On Mon, 2008-06-02 at 12:21 +0530, Aneesh Kumar K.V wrote:
> > On Sun, Jun 01, 2008 at 04:36:10PM -0700, Mingming Cao wrote:
> > > ext4: delalloc block reservation avoid double accounting
> > > 
> > > From: Mingming cao <cmm@...ibm.com>
> > > 
> > > Since fs free blocks counters are already reduced at the block reservation
> > > time, we need to let the underlying block allocation know to avoid
> > > decrease the free blocks counter again when real block allocation finished.
> > > 
> > > Signed-off-by: Mingming cao <cmm@...ibm.com>
> > > ---
> > >  fs/ext4/dir.c     |    3 ++-
> > >  fs/ext4/ext4.h    |    6 +++++-
> > >  fs/ext4/ext4_i.h  |    1 +
> > >  fs/ext4/extents.c |    2 +-
> > >  fs/ext4/inode.c   |   25 ++++++++++++++++++-------
> > >  fs/ext4/mballoc.c |   13 ++++++++++++-
> > >  fs/ext4/super.c   |    2 ++
> > >  7 files changed, 41 insertions(+), 11 deletions(-)
> > > 
> > 
> > I guess you would need a similar change for balloc.c 
> > 
> 
> I haven't try delaloc on non-extent files yet. that's todo after this
> series is settle down. 

how about mount -o nomballoc ?

-aneesh
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