From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>,
Al Viro <viro@ZenIV.linux.org.uk>,
Tavis Ormandy <taviso@google.com>, Jeff Dike <jdike@addtoit.com>,
Julien Tinnes <jln@google.com>, Matt Mackall <mpm@selenic.com>
Cc: kosaki.motohiro@jp.fujitsu.com,
Americo Wang <xiyou.wangcong@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Oleg Nesterov <oleg@redhat.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: [2.6.33-rc5] starting emacs makes lockdep warning
Date: Tue, 26 Jan 2010 14:49:12 +0900 (JST) [thread overview]
Message-ID: <20100126144641.5AB3.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <20100126142644.5AB0.A69D9226@jp.fujitsu.com>
> > On Tue, Jan 26, 2010 at 11:20 AM, KOSAKI Motohiro
> > <kosaki.motohiro@jp.fujitsu.com> wrote:
> > > Hi
> > >
> > > Current linus tree made following lockdep warning when starting emacs command.
> > > Is this known issue?
> > >
> > >
> > > =========================================================
> > > [ INFO: possible irq lock inversion dependency detected ]
> > > 2.6.33-rc5 #77
> > > ---------------------------------------------------------
> > > emacs/1609 just changed the state of lock:
> > > (&(&tty->ctrl_lock)->rlock){+.....}, at: [<ffffffff8127c648>] tty_fasync+0xe8/0x190
> > > but this lock took another, HARDIRQ-unsafe lock in the past:
> > > (&(&sighand->siglock)->rlock){-.....}
> > >
> > > and interrupts could create inverse lock ordering between them.
> > >
> > >
> >
> > Hey,
> >
> > does reverting commit 703625118 help?
>
> Seems solved.
>
> Thanks.
I'm sorry.
I forgot to cc related person at last mail.
Greg, can you please consider revert commit 703625118?
next prev parent reply other threads:[~2010-01-26 5:49 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-26 3:20 KOSAKI Motohiro
2010-01-26 5:25 ` Américo Wang
2010-01-26 5:37 ` KOSAKI Motohiro
2010-01-26 5:49 ` KOSAKI Motohiro [this message]
2010-01-26 6:01 ` Américo Wang
2010-01-26 6:07 ` Al Viro
2010-01-26 6:24 ` Américo Wang
2010-01-26 6:54 ` Al Viro
2010-01-26 7:45 ` KOSAKI Motohiro
2010-01-26 8:45 ` Américo Wang
2010-01-26 9:14 ` Eric W. Biederman
2010-01-26 9:32 ` Américo Wang
2010-01-26 12:33 ` Eric W. Biederman
2010-01-26 15:58 ` [Patch] fix the lockdep warning in tty_fasync() Américo Wang
2010-01-27 1:09 ` KOSAKI Motohiro
2010-01-27 1:47 ` Greg KH
2010-01-26 6:17 ` [2.6.33-rc5] starting emacs makes lockdep warning Eric W. Biederman
2010-01-26 18:16 ` check_usage_backwards() && forwards? (Was: [2.6.33-rc5] starting emacs makes lockdep warning) Oleg Nesterov
2010-01-26 18:47 ` Peter Zijlstra
2010-01-27 2:58 ` Américo Wang
2010-01-27 13:15 ` [tip:core/urgent] lockdep: Fix check_usage_backwards() error message tip-bot for Oleg Nesterov
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=20100126144641.5AB3.A69D9226@jp.fujitsu.com \
--to=kosaki.motohiro@jp.fujitsu.com \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=ebiederm@xmission.com \
--cc=jdike@addtoit.com \
--cc=jln@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mpm@selenic.com \
--cc=oleg@redhat.com \
--cc=taviso@google.com \
--cc=viro@ZenIV.linux.org.uk \
--cc=xiyou.wangcong@gmail.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome