linux-kernel - Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after media change and delay

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Message-ID: <5a4c581d0806220614seab6598ufa798d8642295495@mail.gmail.com>
Date:	Sun, 22 Jun 2008 15:14:33 +0200
From:	"Alessandro Suardi" <alessandro.suardi@...il.com>
To:	"Geert Uytterhoeven" <Geert.Uytterhoeven@...ycom.com>
Cc:	linux-scsi@...r.kernel.org,
	"Linux Kernel Development" <linux-kernel@...r.kernel.org>,
	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
	"Maarten Bressers" <mbres@...too.org>,
	"Daniel Drake" <dsd@...too.org>,
	"Cell Broadband Engine OSS Development" <cbe-oss-dev@...abs.org>
Subject: Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after media change and delay

On Sun, Jun 22, 2008 at 10:18 AM, Geert Uytterhoeven
<Geert.Uytterhoeven@...ycom.com> wrote:
> On Sat, 21 Jun 2008, Alessandro Suardi wrote:
>> On Wed, Jun 18, 2008 at 2:15 PM, Alessandro Suardi
>> <alessandro.suardi@...il.com> wrote:
>> > On Wed, Jun 18, 2008 at 1:13 PM, Geert Uytterhoeven
>> > <Geert.Uytterhoeven@...ycom.com> wrote:
>> >> On Wed, 18 Jun 2008, Alessandro Suardi wrote:
>> >>> On Fri, Jun 13, 2008 at 7:33 PM, Geert Uytterhoeven
>> >>> <Geert.Uytterhoeven@...ycom.com> wrote:
>> >>> > On Fri, 6 Jun 2008, Geert Uytterhoeven wrote:
>> >>> >> When mounting a CD/DVD more than 30 seconds after inserting it, and reading
>> >>> >> from it, we get:
>> >>> >
>> >>> > Apparently the fix didn't make it to all the CCed lists...
>> >>> >
>> >>> > http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fjejb%2Fscsi-rc-fixes-2.6.git;a=commitdiff_plain;h=d1daeabf0da5bfa1943272ce508e2ba785730bf0
>> >>>
>> >>> Oh, that's in mainline ? I still have the problem of having to
>> >>
>> >> Not yet, it's in the scsi-rc-fixes-2.6 tree.
>> >>
>> >>>  insert DVD / try accessing it and get errors / eject / re-insert
>> >>>  and then it magically works... the messages have changed
>> >>>  from what they were as reported here
>> >>>
>> >>> http://bugzilla.kernel.org/show_bug.cgi?id=10116
>> >>>
>> >>>  (see comments #8 and #9) to these ones, in 2.6.26-rc6-git4:
>> >>>
>> >>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Result:
>> >>> hostbyte=0x00 driverbyte=0x08
>> >>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Sense Key : 0x3 [current]
>> >>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] ASC=0x11 ASCQ=0x0
>> >>> Jun 17 22:38:43 sandman kernel: end_request: I/O error, dev sr0, sector 232
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 29
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 30
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 31
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 32
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 33
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 34
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 35
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 36
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 37
>> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 38
>> >>>
>> >>> here I eject and reinsert the disc, and:
>> >>>
>> >>> Jun 17 22:39:10 sandman kernel: UDF-fs: No VRS found
>> >>>
>> >>>  lo and behold, no problem.
>> >>>
>> >>> This does not, alas, happen every time. It might be at the first
>> >>>  DVD access after booting the laptop, but I haven't investigated
>> >>>  in this detail yet.
>> >>
>> >> Does /sys/block/sr0/size reflect the correct size of the DVD?
>> >>
>> >> Did you try applying the patch?
>> >
>> > ATM I'm away from home (as usual), I'll post back when
>> >  I have the info you asked for and tried applying the
>> >  above patch. Thanks !
>>
>> Sigh. I haven't been able to reproduce the problem once since
>>  I posted this. Will keep trying...
>
> Perhaps because the fix is now in mainline?

Eh, that may be a reason :)

I'm indeed tracking mainline and haven't reproduced with
 at least six different discs in -rc7.

--alessandro

 "Give me love / Or give me hate
 Give me anything that's not just ok"

 (Sophia, 'Weightless')
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