linux-kernel - Re: [2.6.39-rc2][bisected] Constant DISK_MEDIA_CHANGE

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Date:	Fri, 15 Apr 2011 19:13:38 +0200
From:	Maciej Rutecki <maciej.rutecki@...il.com>
To:	Shaun Ruffell <sruffell@...ium.com>
Cc:	Jens Axboe <jaxboe@...ionio.com>, linux-kernel@...r.kernel.org
Subject: Re: [2.6.39-rc2][bisected] Constant DISK_MEDIA_CHANGE_EVENTS from CDROM drive.

I created a Bugzilla entry at 
https://bugzilla.kernel.org/show_bug.cgi?id=33342
for your bug report, please add your address to the CC list in there, thanks!

On piątek, 8 kwietnia 2011 o 22:15:13 Shaun Ruffell wrote:
> Running with 2.6.39-rc2 on a CentOS 5.5 installation with a "IDE interface:
> Intel Corporation 82801CA Ultra ATA Storage Controller (rev 02)"
> (8086:248b), I've noticed constant DISK_MEDIA_CHANGE uevents.  In my
> kernel log:
> 
> [ 1107.530699] kobject: 'hda' (f5372610): fill_kobj_path: path =
> '/block/hda' [ 1109.580559] kobject: 'hda' (f5372610): kobject_uevent_env
> [ 1109.580594] kobject: 'hda' (f5372610): fill_kobj_path: path =
> '/block/hda' [ 1111.630560] kobject: 'hda' (f5372610): kobject_uevent_env
> [ 1111.630595] kobject: 'hda' (f5372610): fill_kobj_path: path =
> '/block/hda' [ 1113.680560] kobject: 'hda' (f5372610): kobject_uevent_env
> 
> And from udevmonitor --env:
> 
> UEVENT[1302291995.789487] change@...ock/hda
> ACTION=change
> DEVPATH=/block/hda
> SUBSYSTEM=block
> DISK_MEDIA_CHANGE=1
> MAJOR=3
> MINOR=0
> DEVNAME=hda
> DEVTYPE=disk
> SEQNUM=1318
> 
> I bisected it down to 929e27252e8ca69363f81f26af5eaba62cb4c572 'ide:
> ide_requeue_and_plug() reinstate "always plug" behaviour'
> 
> I haven't yet looked into how that change would result in the change in
> behavior I'm seeing but I thought I would let you know sooner rather than
> leter in case this is something that is already known.
> --
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-- 
Maciej Rutecki
http://www.maciek.unixy.pl
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