2011-04-04 18:27:41

by Larry Finger

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Subject: Regression in 2.6.39-rc1 from commit 7eaceaccab5f40bbfda044629a6298616aeaed50

After I pulled 2.6.39-rc1, my HP laptop failed to boot by never advancing past
the device detection stage on my x86_64 system. The problem was bisected, which
led to:

7eaceaccab5f40bbfda044629a6298616aeaed50 is the first bad commit
commit 7eaceaccab5f40bbfda044629a6298616aeaed50
Author: Jens Axboe <[email protected]>
Date: Thu Mar 10 08:52:07 2011 +0100

block: remove per-queue plugging

Code has been converted over to the new explicit on-stack plugging,
and delay users have been converted to use the new API for that.
So lets kill off the old plugging along with aops->sync_page().

Signed-off-by: Jens Axboe <[email protected]>

As this patch cannot be reversed on current 2.6.39-rc1-git, I have not been able
to do the final test of reverting it, but the bisection was straight forward.

When the system hangs, I can get it to finish booting if I type CTRL/C; however,
the only disk partition that has been mounted is /. If it matters, I use a
mixture of ext3 and ext4 file systems.

My disk controller is "nVidia Corporation MCP67 IDE Controller [10de:0560] (rev a1)"

Please let me know what additional info is needed.

Larry


2011-04-04 20:18:23

by Sitsofe Wheeler

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Subject: Re: Regression in 2.6.39-rc1 from commit 7eaceaccab5f40bbfda044629a6298616aeaed50

On Mon, Apr 04, 2011 at 01:27:35PM -0500, Larry Finger wrote:
> After I pulled 2.6.39-rc1, my HP laptop failed to boot by never advancing
> past the device detection stage on my x86_64 system. The problem was
> bisected, which led to:

Sounds like the same as http://marc.info/?t=130137969500005&r=1&w=2
("Commit 7eaceaccab5f40 causing boot hang.") ...

--
Sitsofe | http://sucs.org/~sits/

2011-04-04 20:50:16

by Larry Finger

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Subject: Re: Regression in 2.6.39-rc1 from commit 7eaceaccab5f40bbfda044629a6298616aeaed50

On 04/04/2011 02:47 PM, Sitsofe Wheeler wrote:
> On Mon, Apr 04, 2011 at 01:27:35PM -0500, Larry Finger wrote:
>> After I pulled 2.6.39-rc1, my HP laptop failed to boot by never advancing
>> past the device detection stage on my x86_64 system. The problem was
>> bisected, which led to:
>
> Sounds like the same as http://marc.info/?t=130137969500005&r=1&w=2
> ("Commit 7eaceaccab5f40 causing boot hang.") ...

Yes it does - thanks. I wonder why Google hadn't indexed that thread.

The patch from http://marc.info/?l=linux-kernel&m=130148511426634&w=2 allows my
computer to boot.

Larry