Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759582AbYHUSNd (ORCPT ); Thu, 21 Aug 2008 14:13:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751990AbYHUSNZ (ORCPT ); Thu, 21 Aug 2008 14:13:25 -0400 Received: from gw.goop.org ([64.81.55.164]:40851 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751977AbYHUSNY (ORCPT ); Thu, 21 Aug 2008 14:13:24 -0400 Message-ID: <48ADB041.9040806@goop.org> Date: Thu, 21 Aug 2008 11:13:21 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= CC: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Ingo Molnar , "H. Peter Anvin" , Yinghai Lu , Jack Steiner , Alan Jenkins , Hugh Dickens Subject: Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request" References: <48AB5D17.5030600@goop.org> <48AC3FA4.9080603@goop.org> In-Reply-To: X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1706 Lines: 44 Rafał Miłecki wrote: > I added full dmesg 5 minutes after adding grepped: > http://bugzilla.kernel.org/attachment.cgi?id=17331 > OK, I think I see the problem (pasted from bugzilla comment): >>>> Some notes as I pick through all the evidence so far: - the crash is specifically because there are reserved bits set in the pmd - the pmd is b02a00043a6001a3 in both cases - the vaddr is ffff88013a600000 in the first crash, and ffff81013a6d1c00 in the second corresponding to the same large-page pmd mapping of phys page 0x13a600000 - this maps to e820 entry BIOS-e820: 0000000100000000 - 0000000140000000 (usable) - the corresponding boot-time mapping is init_memory_mapping 0100000000 - 0140000000 page 2M kernel direct mapping tables up to 140000000 @ b000-11000 ^^^^^^^^^^ addr 100000000 reusing pgd 201880 0000000000202063 last_map_addr: 140000000 end: 140000000 !!! and the memory allocated for this pagetable is: #5 [0000008000 - 000000b000] PGTABLE ==> [0000008000 - 000000b000] #6 [000000b000 - 000000c000] PGTABLE ==> [000000b000 - 000000c000] ^^^^^^^^^^^^^^^^^^^^^^^ IOW, it's mapping using b000-11000, but it has only reserved b000 - c000 Also, this is right in the middle of the ISA area, which seems risky. <<<< Bug #11237 shows the same symptom, so I'm pretty confident they're dups now. J -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/