linux-ext4 - Re: [RFC][PATCH] set_page_buffer_dirty should skip unmapped buffers

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Message-Id: <20060906203442.3b28f293.akpm@osdl.org>
Date:	Wed, 6 Sep 2006 20:34:42 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Badari Pulavarty <pbadari@...ibm.com>
Cc:	Jan Kara <jack@...e.cz>, Anton Altaparmakov <aia21@....ac.uk>,
	sct@...hat.com, linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [RFC][PATCH] set_page_buffer_dirty should skip unmapped buffers

On Wed, 06 Sep 2006 20:04:27 -0700
Badari Pulavarty <pbadari@...ibm.com> wrote:

> > I've been unable to reproduce this crash, btw.  Is there some magic
> > incantation apat from running `fsx-linux'?
> >   
> All I do is on a single 1k filesystem, run 4 copies of fsx (on 4 
> different files, ofcourse).
> I hit the assert anywhere between 10min-2hours.

hm, OK.

It could be that running

	while (1) {
		write(fd, "", 1);
		fsync(fd);
	}

will speed it up: cause a storm of commits, increase the probability.
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