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Date: Tue, 23 Mar 2010 11:22:26 +0800
Message-ID: <2375c9f91003222022q17cfc75fx3f8ebcb7d785dc42@mail.gmail.com>
Subject: Re: [Bug #15202] lockdep warning during elevator_switch
From: =?UTF-8?Q?Am=C3=A9rico_Wang?= <xiyou.wangcong@gmail.com>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Kernel Testers List <kernel-testers@vger.kernel.org>,
       Maciej Rutecki <maciej.rutecki@gmail.com>, Greg KH <gregkh@suse.de>
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On Tue, Mar 23, 2010 at 5:28 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> On Monday 22 March 2010, Hugh Dickins wrote:
>> On Sun, 21 Mar 2010, Rafael J. Wysocki wrote:
>> > The following bug entry is on the current list of known regressions
>> > introduced between 2.6.32 and 2.6.33.  Please verify if it still should
>> > be listed and let the tracking team know (either way).
>> >
>> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=15202
>> > Subject             : lockdep warning during elevator_switch
>> > Submitter   : Hugh Dickins <hugh.dickins@tiscali.co.uk>
>> > Date                : 2010-01-31 23:55 (50 days old)
>> > References  : http://marc.info/?l=linux-kernel&m=126498212613051&w=4
>>
>> Yes, it is still a regression 2.6.33.1 (though fixed in 2.6.34-rc1:
>> my guess is that it will be left as a regression in 2.6.33-stable,
>> since it only happens when you have chosen CONFIG_PROVE_LOCKING=y).
>
> The policy is that we close the regression bugs after they've been fixed in the
> Linus' tree, so I'm going to close it now.

Agreed.

>
> If you want it to go into -stable, please let Greg know directly.
>

Right, but the fix for this issue is too large to go -stable, perhaps.
Lots of related fixes are needed too because of it.

Thanks.