From: Tejun Heo <htejun@gmail.com>
To: Justin Mattock <justinmattock@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: macbook pro dvd playback after suspend Buffer I/O error
Date: Thu, 12 Jun 2008 15:26:52 +0900 [thread overview]
Message-ID: <4850C1AC.4090809@gmail.com> (raw)
In-Reply-To: <dd18b0c30806112315x70dee219oa6738de3e22d4939@mail.gmail.com>
Justin Mattock wrote:
> O.K. applied the patch and did what you have described,(except for
> sysctl -w / ended up inserting dev.scsi.logging_level=1 in
> /etc/sysctl.conf)
> This is what dd reported:(same as before)
> dd: reading `/dev/sr0':Input/output error
> 41+1 records in
> 41+1 records out
> 43122688 bytes (43 MB) copied, 41.0967 seconds, 1.0 MB/s
>
> Attached is dmesg of using dd on the first suspend, and playing a dvd
> on the second.
Ah.. okay. The drive was becoming ready and the read commands were
retried too fast. The drive I tested on was fast enough to deliver the
data but yours wasn't. Hmmm.... This is difficult. This also poses
problems to live cd distros, I think. We probably need to make sr wait
for device readiness. Maybe it's best to put TUR waiting in read error
handling. I'll think about it.
Thanks.
--
tejun
next prev parent reply other threads:[~2008-06-12 6:26 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <dd18b0c30804032207u36bd1f43l358e9949f0c94f79@mail.gmail.com>
2008-04-04 8:21 ` macbook pro dvd playback after suspend Buffer I/O error Andrew Morton
2008-04-04 15:05 ` Justin Mattock
2008-06-11 2:00 ` Tejun Heo
2008-06-11 7:45 ` Justin Mattock
2008-06-11 18:31 ` Justin Mattock
2008-06-11 21:51 ` Tejun Heo
2008-06-11 22:27 ` Justin Mattock
2008-06-12 1:18 ` Tejun Heo
2008-06-12 2:10 ` Justin Mattock
2008-06-12 2:13 ` Justin Mattock
2008-06-12 4:15 ` Tejun Heo
2008-06-12 5:22 ` Justin Mattock
2008-06-12 6:15 ` Justin Mattock
2008-06-12 6:26 ` Tejun Heo [this message]
2008-06-12 6:36 ` Justin Mattock
2008-06-12 6:59 ` Tejun Heo
2008-06-12 7:45 ` Justin Mattock
2008-04-04 19:02 Justin Mattock
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