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From: andrew@lunn.ch (Andrew Lunn)
To: linux-arm-kernel@lists.infradead.org
Subject: I/O issues with writing to mtdblock devices on kirkwood
Date: Sat, 5 Sep 2015 23:08:46 +0200	[thread overview]
Message-ID: <20150905210846.GF6040@lunn.ch> (raw)
In-Reply-To: <1440159857.19360.50.camel@debian.org>

On Fri, Aug 21, 2015 at 01:24:17PM +0100, Ian Campbell wrote:
> Hi kirkwood-upstream,
> 
> We (Debian) have had a couple of reports of I/O errors running Debian
> on kirkwood, specifically it seems to relate to later kernels (e.g.
> 4.0+) and I _suspect_ (without proof) that it may be due to the switch
> from board files to the DTS based kernel, or some change implied by
> this (e.g. different SATA driver now or timeouts have changed
> perhaps?).

Hi Ian

I've not reproduced this exactly, but something similar.

I do a find / and in parallel a cat /dev/mtdblock3 > /dev/null

While the cat is active, the find grinds to a halt. I don't get any
SATA timeouts, but that could be because /dev/mtdblock3 is small
enough that the timers don't expire.

So i will now try to track down if there is a lock getting contended,
or at least why only the cat process makes progress.

   Andrew

  parent reply	other threads:[~2015-09-05 21:08 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-21 12:24 I/O issues with writing to mtdblock devices on kirkwood Ian Campbell
2015-08-21 13:07 ` Andrew Lunn
2015-08-21 20:23   ` Ian Campbell
2015-09-05 21:08 ` Andrew Lunn [this message]
2015-09-06 12:11   ` Ian Campbell
2015-10-11 14:37   ` JM
2015-10-11 15:35     ` Andrew Lunn
2015-10-12 14:29       ` JM
2015-10-12 16:05         ` Rob J. Epping
2015-10-12 16:21           ` Andrew Lunn
2015-10-13  7:51             ` Ian Campbell
     [not found]               ` <5626B4DC.8000407@mcfarlanes.me>
     [not found]                 ` <5627F4E8.3030907@mcfarlanes.me>
2015-10-21 21:11                   ` Ian Campbell
2015-10-21 21:22                     ` Iain McFarlane
2015-10-21 21:28                       ` JM
2015-10-21 21:31                         ` Iain McFarlane
2015-10-22  0:38                       ` Andrew Lunn
2015-10-22  6:40                       ` Ian Campbell
2015-10-22  6:40                       ` Ian Campbell
2016-01-11 23:00       ` Martin Michlmayr
2016-01-11 23:22         ` Mark Brown
2016-01-11 23:43           ` Andrew Lunn
2016-01-12  1:21             ` Mark Brown
2016-01-12  0:07           ` Martin Michlmayr
2016-01-12  0:47             ` Mark Brown
2016-01-12  1:19               ` Andrew Lunn
2016-01-12  1:31                 ` Mark Brown
2016-01-12 16:29                 ` Arnd Bergmann
2016-01-12 18:02                   ` Mark Brown
2016-01-12 21:49                     ` Arnd Bergmann
2016-01-12 22:00                       ` Mark Brown
2016-01-12 22:41                         ` Arnd Bergmann
2016-01-13 11:42                           ` Mark Brown

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