linux-kernel - Re: [BUG] soft lockup detected with ipcs

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:	Fri, 29 Feb 2008 12:43:19 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Jiri Olsa <olsajiri@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] soft lockup detected with ipcs

On Fri, 29 Feb 2008, Jiri Olsa wrote:

> when I run 'ipcs' my system freeze up immediatelly. I was able to get 
> kernel BUG message once, I think it is not printed out all the time it 
> freeze.
> I tried on 2.6.24, 2.6.20 and 2.6.18.
> I attached screenshot from 2.6.18 freeze and config.

Could you please turn all the lock debugging options in your .config on 
(most importantly CONFIG_PROVE_LOCKING, and all the other lock debugging 
options might come handy too) and try again, to see if we get any debug 
error messages? I'd guess that someone is holding mqueue_inode_info->lock 
for too long or there is some AB-BA deadlock on it, which lockdep and 
friends might be able to diagnose.

-- 
Jiri Kosina
SUSE Labs

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/