From: Jens Axboe <jens.axboe@oracle.com>
To: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
linux-kernel@vger.kernel.org
Subject: Re: lockdep warning during elevator_switch
Date: Tue, 2 Feb 2010 21:58:30 +0100 [thread overview]
Message-ID: <20100202205830.GJ5733@kernel.dk> (raw)
In-Reply-To: <alpine.LSU.2.00.1001312327260.7190@sister.anvils>
On Sun, Jan 31 2010, Hugh Dickins wrote:
> From 2.6.33-rc3 onwards, PROVE_LOCKING=y gives me the warning below when
> I "echo deadline >/sys/block/sdb/queue/scheduler" to change it from cfq.
>
> Backing out 846f99749ab68bbc7f75c74fec305de675b1a1bf "sysfs: Add lockdep
> annotations for the sysfs active reference" stops the warning -
> but I realize that doesn't mean the actual problem (if any) is fixed.
Thanks Hugh, I hadn't noticed this yet. I do online switches all the
time, but depending on tests lockdep may not be enabled (it steals all
my performance...). I'll take a look.
--
Jens Axboe
prev parent reply other threads:[~2010-02-02 20:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-31 23:55 lockdep warning during elevator_switch Hugh Dickins
2010-02-02 20:58 ` Jens Axboe [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100202205830.GJ5733@kernel.dk \
--to=jens.axboe@oracle.com \
--cc=ebiederm@xmission.com \
--cc=hugh.dickins@tiscali.co.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=rjw@sisk.pl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.