From owner-freebsd-stable@FreeBSD.ORG Mon Apr 22 09:42:17 2013 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 613C4FFE for ; Mon, 22 Apr 2013 09:42:17 +0000 (UTC) (envelope-from jaapb@kerguelen.org) Received: from mail-wi0-x232.google.com (mail-wi0-x232.google.com [IPv6:2a00:1450:400c:c05::232]) by mx1.freebsd.org (Postfix) with ESMTP id F0A5C1B52 for ; Mon, 22 Apr 2013 09:42:16 +0000 (UTC) Received: by mail-wi0-f178.google.com with SMTP id hm14so779025wib.5 for ; Mon, 22 Apr 2013 02:42:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:from:to:subject:date:message-id:user-agent:mime-version :content-transfer-encoding:content-type:x-gm-message-state; bh=0poNwm/zq1wrIfTgHCzJKNBMTR+dh3WzZqI4b/GQh2Q=; b=XmZ6qP8Os2D46uBsKixHGuHAfXhirpQbSTuu40EwZjshkuPkg2PPCqkdQfZzUmhq4+ M0Iv19uVIm6RC/sRdiM5v+S3RRp0/pUPggk9ClLutdPVruCQGnTOD0MkOsVWZTm4g4C1 Uo9y5WBIaU6yHBG8+cauC/OhdfaOGZoHv3qFMXPwFMZaQnFEenzmo86xGQ5rk7QysSKH vHVcsBuIn9v+4slkEna6dXuPEkdkzXQFfudJzEIOd4yq/bs4yWbtIsc23zDbbjvS1+rJ CtK/y1IEh6csnli0ziyTLJ3rjdz7ChmbsiW9mswfBMEQDx4L1n8YTBq4UyXaco9/1+++ eAHQ== X-Received: by 10.194.176.228 with SMTP id cl4mr50595059wjc.10.1366623732775; Mon, 22 Apr 2013 02:42:12 -0700 (PDT) Received: from purcell.mdx.ac.uk (dyn095-083.mdx.ac.uk. [158.94.95.83]) by mx.google.com with ESMTPS id q20sm7928770wiv.7.2013.04.22.02.42.10 (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 22 Apr 2013 02:42:11 -0700 (PDT) From: Jaap Boender To: freebsd-stable@freebsd.org Subject: page fault in pmap_copy Date: Mon, 22 Apr 2013 10:42:03 +0100 Message-ID: <33333809.z62X2jXMfa@purcell.mdx.ac.uk> User-Agent: KMail/4.10.1 (FreeBSD/9.1-STABLE; KDE/4.10.1; amd64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Gm-Message-State: ALoCoQlGiendeWM7Uozo0OsaOyB3JrmvuuE60M7k2HS9+1b4oGjHdndND65ALGyJ+U6H1hv1U6jP X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Apr 2013 09:42:17 -0000 Hello all, Over the last few days, I've been having my (9.1-STABLE, amd64) laptop reboot due to a page fault every once in a while. I don't really know what triggers it, except for vague suspicions that it seems to happen when I'm using Kontact (fail to see why would that be the reason). It seems to happen at random, though the last two days the pattern has been for it to happen immediately after I switch on the laptop in the morning, and then I'm all right for the rest of the day. I'm suspecting it has something to do with the Intel DRM drivers - I switched from Vesa some time ago, and the crashes started happening after that. It's just a suspicion, though. Here's a typical kernel backtrace: #0 0xffffffff804c8116 at kdb_backtrace+0x66 #1 0xffffffff8049230d at panic+0x1cd #2 0xffffffff806ff300 at trap_fatal+0x290 #3 0xffffffff806ff638 at trap_pfault+0x1e8 #4 0xffffffff806ffc3e at trap+0x3be #5 0xffffffff806e932f at calltrap+0x8 #6 0xffffffff806fc024 at pmap_copy+0x524 #7 0xffffffff806d1144 at vmspace_fork+0x454 #8 0xffffffff80463398 at fork1+0x328 #9 0xffffffff80464e02 at sys_fork+0x22 #10 0xffffffff806febe0 at amd64_syscall+0x540 #11 0xffffffff806e9617 at Xfast_syscall+0xf7 Has anyone seen something similar, or maybe even got a solution? I've done a quick search, but couldn't really find anything. If more data are needed (kernel configuration, more extensive backtraces, core dumps, etc.) I'd obviously be happy to provide those. Thanks, Jaap Boender