linux-ext4 - Re: [patch 15/23] ext3 -nobh option causes oops

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Date:	Thu, 16 Nov 2006 15:07:54 -0800
From:	Badari Pulavarty <pbadari@...ibm.com>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [patch 15/23] ext3 -nobh option causes oops


On Thu, 2006-11-16 at 23:51 +0100, Adrian Bunk wrote:
> It seems this patch that went into 2.6.17.8 should also be included in 
> the 2.6.16.x branch, or do I miss anything?
> 

Yes. This is needed for 2.6.16.x branch also.

Thanks,
Badari


> On Thu, Aug 03, 2006 at 10:40:03PM -0700, Greg KH wrote:
> > -stable review patch.  If anyone has any objections, please let us know.
> > 
> > ------------------
> > From: Badari Pulavarty <pbadari@...ibm.com>
> > 
> > For files other than IFREG, nobh option doesn't make sense.  Modifications
> > to them are journalled and needs buffer heads to do that.  Without this
> > patch, we get kernel oops in page_buffers().
> > 
> > Signed-off-by: Badari Pulavarty <pbadari@...ibm.com>
> > Signed-off-by: Andrew Morton <akpm@...l.org>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> > 
> > ---
> >  fs/ext3/inode.c |    6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > --- linux-2.6.17.7.orig/fs/ext3/inode.c
> > +++ linux-2.6.17.7/fs/ext3/inode.c
> > @@ -1159,7 +1159,7 @@ retry:
> >  		ret = PTR_ERR(handle);
> >  		goto out;
> >  	}
> > -	if (test_opt(inode->i_sb, NOBH))
> > +	if (test_opt(inode->i_sb, NOBH) && ext3_should_writeback_data(inode))
> >  		ret = nobh_prepare_write(page, from, to, ext3_get_block);
> >  	else
> >  		ret = block_prepare_write(page, from, to, ext3_get_block);
> > @@ -1245,7 +1245,7 @@ static int ext3_writeback_commit_write(s
> >  	if (new_i_size > EXT3_I(inode)->i_disksize)
> >  		EXT3_I(inode)->i_disksize = new_i_size;
> >  
> > -	if (test_opt(inode->i_sb, NOBH))
> > +	if (test_opt(inode->i_sb, NOBH) && ext3_should_writeback_data(inode))
> >  		ret = nobh_commit_write(file, page, from, to);
> >  	else
> >  		ret = generic_commit_write(file, page, from, to);
> > @@ -1495,7 +1495,7 @@ static int ext3_writeback_writepage(stru
> >  		goto out_fail;
> >  	}
> >  
> > -	if (test_opt(inode->i_sb, NOBH))
> > +	if (test_opt(inode->i_sb, NOBH) && ext3_should_writeback_data(inode))
> >  		ret = nobh_writepage(page, ext3_get_block, wbc);
> >  	else
> >  		ret = block_write_full_page(page, ext3_get_block, wbc);
> > 

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