linux-kernel - Re: [PATCH 15/15] BKL: Update documentation on llseek(.)

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Date:	Fri, 20 Nov 2009 17:02:25 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jan Blunck <jblunck@...e.de>
Cc:	linux-fsdevel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Linux-Kernel Mailinglist <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>, jkacur@...hat.com,
	Arnd Bergmann <arnd@...db.de>,
	Frédéric Weisbecker 
	<fweisbec@...il.com>, Jamie Lokier <jamie@...reable.org>,
	Jan Blunck <jblunck@...e.de>,
	Randy Dunlap <rdunlap@...otime.net>
Subject: Re: [PATCH 15/15] BKL: Update documentation on
 llseek(.)

On Fri, 20 Nov 2009 17:40:45 +0100
Jan Blunck <jblunck@...e.de> wrote:

> The inode's i_size is not protected by the big kernel lock. Therefore it
> does not make sense to recommend taking the BKL in filesystems llseek
> operations. Instead it should use the inode's mutex or use just use
> i_size_read() instead. Add a note that this is not protecting file->f_pos.

Looks good to me reading through it.

Alan
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