linux-kernel - Re: [2.6.26 patch] fuse: add flag to turn on big writes

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Date:	Fri, 9 May 2008 15:44:44 +0300 (EEST)
From:	Szabolcs Szakacsits <szaka@...s-3g.org>
To:	Miklos Szeredi <miklos@...redi.hu>
cc:	akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [2.6.26 patch] fuse: add flag to turn on big writes


On Fri, 9 May 2008, Miklos Szeredi wrote:

> From: Miklos Szeredi <mszeredi@...e.cz>
> 
> Prior to 2.6.26 fuse only supported single page write requests.  In
> theory all fuse filesystem should be able support bigger than 4k
> writes, as there's nothing in the API to prevent it.  Unfortunately
> there's a known case in NTFS-3G where big writes cause filesystem
> corruption.  There could also be other filesystems, where the lack of
> testing with big write requests would result in bugs.
> 
> To prevent such problems on a kernel upgrade, disable big writes by
> default, but let filesystems set a flag to turn it on.
> 
> Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
> CC: Szabolcs Szakacsits <szaka@...s-3g.org>

Big thanks Miklos!

Acked-by: Szabolcs Szakacsits <szaka@...s-3g.org>

        Szaka

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