Date: Mon, 30 Oct 2006 18:32:23 +0200
From: "Michael S. Tsirkin" <mst@mellanox.co.il>
To: "Jun'ichi Nomura" <j-nomura@ce.jp.nec.com>
Cc: Martin Lorenz <martin@lorenz.eu.org>, Pavel Machek <pavel@suse.cz>,
       Adrian Bunk <bunk@stusta.de>, Linus Torvalds <torvalds@osdl.org>,
       Andrew Morton <akpm@osdl.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       len.brown@intel.com, linux-acpi@vger.kernel.org, linux-pm@osdl.org,
       "Randy.Dunlap" <rdunlap@xenotime.net>
Subject: Re: 2.6.19-rc3: known unfixed regressions (v3)
Message-ID: <20061030163223.GK1941@mellanox.co.il>
Reply-To: "Michael S. Tsirkin" <mst@mellanox.co.il>
References: <45462591.7020200@ce.jp.nec.com>
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Quoting r. Jun'ichi Nomura <j-nomura@ce.jp.nec.com>:
> Subject: Re: 2.6.19-rc3: known unfixed regressions (v3)
> 
> Hi Michael,
> 
>  > 2.6.19-rc3 without reverting
>  > d7dd8fd9557840162b724a8ac1366dd78a12dff stops receiving ACPI events after some
>  > use (sometimes after suspend/resume, sometimes after kernel build stress).  Now,
>  > what does this tell us? Andrew, any idea?
> 
> The code is related to bd_claim_by_disk which is called when
> device-mapper or md tries to mark the underlying devices
> for exclusive use and creates symlinks from/to the devices
> in sysfs. The patch added error handlings which weren't in
> the original code.
> 
> I have no idea how it affects ACPI event handling.

It's a mystery. Probably exposes a bug somewhere?

> Are you using dm and/or md on your machine?

The .config is attached to bugzilla.

> Have you seen any unusual kernel messages or symptoms regarding
> dm/md before the ACPI problem occurs?

I haven't.

-- 
MST
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