linux-kernel - Re: [2.6.33-rc5] Weird deadlock when shutting down

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 20 Feb 2010 09:46:47 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Dave Young <hidave.darkstar@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [2.6.33-rc5] Weird deadlock when shutting down

On Sat, 2010-02-20 at 15:42 +0800, Dave Young wrote:

> > Well, it used to not deadlock and actually shut down the machine :)
> So
> > in that sense it's definitely new. It might have printed a lockdep
> > warning before, which you wouldn't normally see since the machine
> turns
> > off right after this.
> 
> before shutdown, you can:
> echo N > /proc/sys/kernel/printk_delay
> to see the printk messages, N is 0-10000 in milliseconds

Well if I understand Américo correctly then it won't have printed
anything (even if it were to deadlock) before adding the lockdep
annotations to s_active, so I guess that theory is out.

johannes

Download attachment "signature.asc" of type "application/pgp-signature" (802 bytes)