From: Geert Uytterhoeven Subject: Re: Crash (ext3 ) during 2.6.29-rc6 boot Date: Tue, 24 Feb 2009 19:01:59 +0100 (CET) Message-ID: References: <49A2705D.9030008@in.ibm.com> <20090223021320.11019d64.akpm@linux-foundation.org> <18850.31567.212454.514549@cargo.ozlabs.ibm.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-15 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Andrew Morton , Jan Kara , Mel Gorman , linux-kernel , linuxppc-dev@ozlabs.org, linux-ext4@vger.kernel.org To: Paul Mackerras Return-path: Received: from vervifontaine.sonytel.be ([80.88.33.193]:44368 "EHLO vervifontaine.sonycom.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752175AbZBXSCC (ORCPT ); Tue, 24 Feb 2009 13:02:02 -0500 In-Reply-To: <18850.31567.212454.514549@cargo.ozlabs.ibm.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, 23 Feb 2009, Paul Mackerras wrote: > Andrew Morton writes: > > It looks like we died in ext3_xattr_block_get(): > >=20 > > memcpy(buffer, bh->b_data + le16_to_cpu(entry->e_value_offs), > > size); > >=20 > > Perhaps entry->e_value_offs is no good. I wonder if the filesystem= is > > corrupted and this snuck through the defenses. > >=20 > > I also wonder if there is enough info in that trace for a ppc perso= n to > > be able to determine whether the faulting address is in the source = or > > destination of the memcpy() (please)? >=20 > It appears to have faulted on a load, implicating the source. The > address being referenced (0xc00000003f380000) doesn't look > outlandish. I wonder if this kernel has CONFIG_DEBUG_PAGEALLOC turne= d > on, and what page size is selected? I'm seeing a similar thing on PS3, but not in ext3. During early usersp= ace setup (udevd), it crashes accessing a 0xc00* address in: | NIP setup+0x20/0x130 | LR copy_user_page+0x18/0x6c | Call trace: | do_wp_page+0x5b4/0x89c | do_page_fault+0x3a8/0x58c | handle_page_fault+0x20/0x5c I have CONFIG_DEBUG_PAGEALLOC=3Dy. If I disable it, the system boots fi= ne. If needed, I can probably bisect this tomorrow. It definitely didn't ha= ppen in 2.6.29-rc5. With kind regards, Geert Uytterhoeven Software Architect Sony Techsoft Centre Europe The Corporate Village =B7 Da Vincilaan 7-D1 =B7 B-1935 Zaventem =B7 Bel= gium Phone: +32 (0)2 700 8453 =46ax: +32 (0)2 700 8622 E-mail: Geert.Uytterhoeven@sonycom.com Internet: http://www.sony-europe.com/ A division of Sony Europe (Belgium) N.V. VAT BE 0413.825.160 =B7 RPR Brussels =46ortis =B7 BIC GEBABEBB =B7 IBAN BE41293037680010 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html