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

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Message-Id: <1168974857.5975.36.camel@lappy>
Date:	Tue, 16 Jan 2007 20:14:16 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Nick Piggin <npiggin@...e.de>
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, 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.

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