linux-kernel - Re: [PATCH 05/24] ceph: ref counted buffer

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Message-Id: <200912050231.23530.ioe-lkml@rameria.de>
Date:	Sat, 5 Dec 2009 02:31:23 +0100
From:	Ingo Oeser <ioe-lkml@...eria.de>
To:	Sage Weil <sage@...dream.net>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 05/24] ceph: ref counted buffer

On Friday 04 December 2009, Sage Weil wrote:
> struct ceph_buffer is a simple ref-counted buffer.  We transparently
> choose between kmalloc for small buffers and vmalloc for large ones.
> 
> This is currently used only for allocating memory for xattr data.

Could you wrap parts of this refcounting logic around kref?
see #include <linux/kref.h> and lib/kref.c

It avoids a bug with memory areas for free and if anybody
optimizes or changes refcounting stuff, you get all changes for free :-)

Best Regards

Ingo Oeser
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