From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755895Ab0EYWxy (ORCPT ); Tue, 25 May 2010 18:53:54 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:39697 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751567Ab0EYWxx (ORCPT ); Tue, 25 May 2010 18:53:53 -0400 From: "Rafael J. Wysocki" To: Rusty Russell Subject: Re: [Regression] Crash in load_module() while freeing args Date: Wed, 26 May 2010 00:54:52 +0200 User-Agent: KMail/1.12.4 (Linux/2.6.34-tst; KDE/4.3.5; x86_64; ; ) Cc: LKML , Linus Torvalds , Andrew Morton , Brandon Philips References: <201005252300.07739.rjw@sisk.pl> In-Reply-To: <201005252300.07739.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201005260054.52122.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 25 May 2010, Rafael J. Wysocki wrote: > Hi, > > Recent -git kernels crash for me quite often during boot, reporting that kernel > paging request could not be satisfied at load_module+0x18e4, which > corresponds to line 2483 of kernel/module.c for the kernel in question (however > the same call trace says IP is at precpu_modfree+0x1 at the moment of the > crash, which seems to point to line 2481 of the same file). It doesn't happen > every time, but it does happen often enough to be annoying and the call > trace is always exactly the same. > > I'm going to revert post-2.6.34 commits that touch kernel/module.c directly > and see what happens. I'm not able to reproduce the issue with the following commit reverted: commit 480b02df3aa9f07d1c7df0cd8be7a5ca73893455 Author: Rusty Russell Date: Wed May 19 17:33:39 2010 -0600 module: drop the lock while waiting for module to complete initialization. Thanks, Rafael