From: Milton Miller <miltonm@bga.com>
To: Michal Simek <michal.simek@petalogix.com>
Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: Unaligned jffs2 dnode address - tested by nandsim
Date: Fri, 27 May 2011 09:35:18 -0500 [thread overview]
Message-ID: <1306506918_8903@mail4.comsite.net> (raw)
In-Reply-To: <4DDB5F60.1080703@petalogix.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: Milton Miller <miltonm@bga.com>
To: Michal Simek <michal.simek@petalogix.com>
Cc: <linux-kernel@vger.kernel.org>, <linux-mtd@lists.infradead.org>
Subject: Re: Unaligned jffs2 dnode address - tested by nandsim
Date: Fri, 27 May 2011 09:35:18 -0500 [thread overview]
Message-ID: <1306506918_8903@mail4.comsite.net> (raw)
In-Reply-To: <4DDB5F60.1080703@petalogix.com>
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
next prev parent reply other threads:[~2011-05-27 14:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 11:42 Unaligned jffs2 dnode address - tested by nandsim Michal Simek
2011-05-24 7:33 ` Michal Simek
2011-05-24 7:33 ` Michal Simek
2011-05-27 14:35 ` Milton Miller [this message]
2011-05-27 14:35 ` Milton Miller
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