From: Theodore Ts'o <tytso@mit.edu>
To: "Kevyn-Alexandre Paré" <kevyn.alexandre.pare@gmail.com>
Cc: linux-omap@vger.kernel.org, linux-mmc@vger.kernel.org,
linux-ext4@vger.kernel.org, arnd@linaro.org
Subject: Re: Unable to randomly boot rootfs (EXT3 or EXT4) from SD: MMC error -110 (TIMEDOUT)
Date: Wed, 28 Aug 2013 13:56:22 -0400 [thread overview]
Message-ID: <20130828175622.GA27079@thunk.org> (raw)
In-Reply-To: <CAL1yNcLzXir7KFavxaQK3OWWU5hHc06tvOSLrdvWB-VoEJdXQA@mail.gmail.com>
On Wed, Aug 28, 2013 at 11:22:58AM -0400, Kevyn-Alexandre Paré wrote:
> We try multiple of our system ( Different micro SD from SanDisk +
> Overo with OMAP3) and they are all doing this with the SanDisk 64GB,
> 32GB :
> http://www.sandisk.com/products/memory-cards/microsd/ultra-class10-for-android/?capacity=64GB
>
> The problem seem to be easier to reproduce when we just flash the
> micro SD (partition, format & copy rootfs) at it first boot.
> Also, when we let the system down for a couple of days and then
> sometimes we need to reboot the system multiple times before it fall
> back alright.
>
> We found a old patch that was simply increasing the timeout of the host:
> http://cgit.openembedded.org/cgit.cgi/openembedded/tree/recipes/linux/linux-omap-2.6.39/sakoman/0024-omap-mmc-Adjust-dto-to-eliminate-timeout-errors.patch?h=org.openembedded.dev
>
> By settings the timeout to zero I reproduce kind of the same timeout
> error at every boot. That was expected since I don't let enough time
> to the controller to respond...
>
> Could the mix of that MMC controller and these card is not optimal? Is
> the driver fully supporting the UHS-I speed grade?
I've cc'ed Arnd Bergman who works at Linaro; I suspect that if he
doesn't know the answer off the top of his head, he can probably
direct you to someone who will.
- Ted
next prev parent reply other threads:[~2013-08-28 17:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-21 17:07 Unable to randomly boot rootfs (EXT3 or EXT4) from SD: MMC error -110 (TIMEDOUT) Kevyn-Alexandre Paré
2013-08-27 21:47 ` Kevyn-Alexandre Paré
2013-08-27 22:01 ` Theodore Ts'o
2013-08-28 15:22 ` Kevyn-Alexandre Paré
2013-08-28 17:56 ` Theodore Ts'o [this message]
2013-08-29 19:39 ` Kevyn-Alexandre Paré
2013-08-29 19:49 ` Kevyn-Alexandre Paré
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130828175622.GA27079@thunk.org \
--to=tytso@mit.edu \
--cc=arnd@linaro.org \
--cc=kevyn.alexandre.pare@gmail.com \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-mmc@vger.kernel.org \
--cc=linux-omap@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).