linux-kernel - Re: Status of buffered write path (deadlock fixes)

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Date:	Tue, 12 Dec 2006 03:39:54 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Steven Whitehouse <steve@...gwyn.com>
CC:	Mark Fasheh <mark.fasheh@...cle.com>,
	Linux Memory Management <linux-mm@...ck.org>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	Andrew Morton <akpm@...gle.com>
Subject: Re: Status of buffered write path (deadlock fixes)

Steven Whitehouse wrote:

>>Hmm, doesn't look like we can do this either because at least GFS2
>>uses BH_New for its own special things.
>>
> 
> What makes you say that? As far as I know we are not doing anything we
> shouldn't with this flag, and if we are, then I'm quite happy to
> consider fixing it up so that we don't,

Bad wording. Many other filesystems seem to only make use of buffer_new
between prepare and commit_write.

gfs2 seems to at least test it in a lot of places, so it is hard to know
whether we can change the current semantics or not. I didn't mean that
gfs2 is doing anything wrong.

So can we clear it in commit_write?

-- 
SUSE Labs, Novell Inc.
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