linux-kernel - Re: [patch 4/5] btrfs: add nofail variant of set_extent

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Date:	Tue, 24 Aug 2010 15:30:55 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Chris Mason <chris.mason@...cle.com>,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 4/5] btrfs: add nofail variant of set_extent_dirty

On Tue, 2010-08-24 at 03:50 -0700, David Rientjes wrote:
> Add set_extent_dirty_nofail().  This function is equivalent to
> set_extent_dirty(), except that it will never fail because of allocation
> failure and instead loop forever trying to allocate memory.
> 
> If the first allocation attempt fails, a warning will be emitted,
> including a call trace.  Subsequent failures will suppress this warning.
> 
> This was added as a helper function for documentation and auditability.
> No future callers should be added.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>
> ---
>  fs/btrfs/extent-tree.c |    8 ++++----
>  fs/btrfs/extent_io.c   |   19 +++++++++++++++++++
>  fs/btrfs/extent_io.h   |    2 ++
>  3 files changed, 25 insertions(+), 4 deletions(-)

I'd much rather someone help mason to clean this up.
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