linux-kernel - Re: [patch 6/10] mm: be sure to trim blocks

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Date:	Sat, 20 Jan 2007 04:52:04 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Linux Memory Management <linux-mm@...ck.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux Filesystems <linux-fsdevel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [patch 6/10] mm: be sure to trim blocks

On Tue, Jan 16, 2007 at 08:14:16PM +0100, Peter Zijlstra wrote:
> On Tue, 2007-01-16 at 18:36 +0100, Peter Zijlstra wrote:
> >   							buf, bytes);
> > > @@ -1935,10 +1922,9 @@ generic_file_buffered_write(struct kiocb
> > >  						cur_iov, iov_offset, bytes);
> > >  		flush_dcache_page(page);
> > >  		status = a_ops->commit_write(file, page, offset, offset+bytes);
> > > -		if (status == AOP_TRUNCATED_PAGE) {
> > > -			page_cache_release(page);
> > > -			continue;
> > > -		}
> > > +		if (unlikely(status))
> > > +			goto fs_write_aop_error;
> > > +
> > 
> > I don't think this is correct, see how status >= 0 is used a few lines
> > downwards. Perhaps something along the lines of an
> > is_positive_aop_return() to test on?
> 
> Hmm, if commit_write() will never return non error positive values then
> this and 8/10 look sane.

It's really ugly, but it looks like at least some filesystems do. So
I'll fix up this.
-
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