linux-kernel - Re: Unaligned jffs2 dnode address

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Message-ID: <1306506918_8903@mail4.comsite.net>
Date:	Fri, 27 May 2011 09:35:18 -0500
From:	Milton Miller <miltonm@....com>
To:	Michal Simek <michal.simek@...alogix.com>
Cc:	<linux-kernel@...r.kernel.org>, <linux-mtd@...ts.infradead.org>
Subject: Re: Unaligned jffs2 dnode address - tested by nandsim

Michal Simek wrote:
> Michal Simek wrote:
> >
> > Hi,
> >
> > I have reached one problem with jffs2 fs ecc tested by nandsim on
> > Microblaze.
>
> Any update on this? Does someone know if jffs dnode should be aligned or not?
> I have added some developers from mtd-utils.
> 
> I have also done test with the latest mtd-utils from git and
> there is still unaligned address.
> 
> Any suggestions?

I vaguely remember doingn some research in this area a few years ago
looking a report on linuxppc-dev about this and the kernel's unaligned
access was dependant on the device being given a mtd point function
which means the device is directly accessible in the cpus address space.

I don't remember much beyond that and don't have time to dig.  I am
just an observer with respect to linux mtd.

> 
> Thanks,
> Michal

Hope this helps your research,
milton
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