linux-kernel - Re: [BUG] kernel BUG at /.../block/cfq-iosched.c:3145!

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Date:	Thu, 10 Apr 2014 13:35:37 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Jens Axboe <axboe@...com>
Cc:	Jan Kara <jack@...e.cz>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Brian J King <bjking1@...ibm.com>
Subject: Re: [BUG] kernel BUG at /.../block/cfq-iosched.c:3145!

On Wed, 2014-04-09 at 20:25 -0600, Jens Axboe wrote:
> On 2014-04-09 19:36, Benjamin Herrenschmidt wrote:
> > On Wed, 2014-04-09 at 19:31 -0600, Jens Axboe wrote:
> >> OK, I think we're seeing different symptoms of the same bug. Stay
> >> tuned, will have something for you to test shortly, I hope.
> >
> > Ah thanks. I'll defer the bisection then (it's painful on that machine
> > for various reasons....)
> 
> Can you try with these two patches applied?

Booted to login prompt once ... and twice. Much better ! :-)

Thanks a lot !

Not sure if it's related, but in the "good" boots (with the patch),
I see a truckload of:

systemd-udevd[3264]: starting version 204
sr 2:6:0:0: [sr0]  
Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sr 2:6:0:0: [sr0]  
Sense Key : Illegal Request [current] 
sr 2:6:0:0: [sr0]  
Add. Sense: Logical block address out of range
sr 2:6:0:0: [sr0] CDB: 
Read(10): 28 00 00 00 00 00 00 00 01 00
end_request: critical target error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
[  OK  ] Started udev Kernel Device Manager.
sr 2:6:0:0: [sr0]  
Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
sr 2:6:0:0: [sr0]  
Sense Key : Illegal Request [current] 
sr 2:6:0:0: [sr0]  
Add. Sense: Logical block address out of range
sr 2:6:0:0: [sr0] CDB: 
 
   etc...

I might have a crap coaster in that drive. It doesn't prevent
the machine from working otherwise, so far...

Cheers,
Ben.


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