linux-kernel - Re: [PATCH v2 1/2] jffs2: implement mount option parsing and compression overriding

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Message-ID: <1319034155.25389.81.camel@sauron>
Date:	Wed, 19 Oct 2011 17:22:28 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Andres Salomon <dilinger@...ued.net>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] jffs2: implement mount option parsing and
 compression overriding

On Sun, 2011-10-16 at 18:15 -0700, Andres Salomon wrote:
> Currently jffs2 has compile-time constants (and .config options)
> controlling whether or not the various compression/decompression
> drivers are built in and enabled.  This is fine for embedded
> systems, but it clashes with distribution kernels.  Distro kernels
> tend to turn on everything; this causes OpenFirmware to fall
> over, as it understands ZLIB-compressed inodes.  Booting a kernel
> that has LZO compression enabled, writing to the boot partition,
> and then rebooting causes OFW to fail to read the kernel from
> the filesystem.  This is because LZO compression has priority
> when writing new data to jffs2, if LZO is enabled.
> 
> This patch adds mount option parsing, and a single supported
> option ("compr=none").  This adds the flexibility of being
> able to specify which compressor overrides on a per-superblock
> basis.  For now, we can simply disable compression;
> additional flexibility coming soon.

Pushed both to l2-mtd-2.6.git, thanks!

-- 
Best Regards,
Artem Bityutskiy

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