linux-kernel - Re: [feature] automatically detect hung TASK

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]

Message-ID: <20071202200953.GA23994@one.firstfloor.org>
Date:	Sun, 2 Dec 2007 21:09:53 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

> .. and it's even a tool to show where we missed making something
> TASK_KILLABLE... anything that triggers from NFS and the like really
> ought to be TASK_KILLABLE after all. This patch will point any
> omissions out quite nicely without having to do any kind of destructive
> testing.

It would be better to just audit the source for those. Outlawing
something which was previously legal without auditing the source
is bad.

Anyways, i suspect it would just lead to more people disabling
softlockup. I remember during some older stress testing it also
tended to explode regularly, so e.g. SUSE kernel rpms have it disabled.
That patch would probably make it worse.

-Andi
--
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/