From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263030AbVDLXdD (ORCPT ); Tue, 12 Apr 2005 19:33:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263076AbVDLXa3 (ORCPT ); Tue, 12 Apr 2005 19:30:29 -0400 Received: from mx2.elte.hu ([157.181.151.9]:65512 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S263075AbVDLX04 (ORCPT ); Tue, 12 Apr 2005 19:26:56 -0400 Date: Wed, 13 Apr 2005 01:26:48 +0200 From: Ingo Molnar To: William Weston Cc: linux-kernel@vger.kernel.org Subject: Re: BUGs in 2.6.12-rc2-RT-V0.7.45-01 Message-ID: <20050412232648.GB23341@elte.hu> References: <20050412230921.GA22360@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * William Weston wrote: > > what are you using kprobes for? Do you get lockups even if you disable > > kprobes? > > I'm not using kprobes currently. I'll recompile and see if the > lockups go away. ah - it's an 'empty' kprobes check, and python triggered a userspace int3. I think kprobes should really get some RCU locking to check its handler list, to not slow down normal int3 processing. Meanwhile, disabling kprobes in the .config will probably work around this particular problem. Ingo