Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755495AbYCLW0Z (ORCPT ); Wed, 12 Mar 2008 18:26:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751685AbYCLW0P (ORCPT ); Wed, 12 Mar 2008 18:26:15 -0400 Received: from ozlabs.org ([203.10.76.45]:60887 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751138AbYCLW0O (ORCPT ); Wed, 12 Mar 2008 18:26:14 -0400 Subject: Re: [BUG] 2.6.25-rc5-mm1 kernel panic with "Exception: 501 " on powerpc From: Michael Ellerman Reply-To: michael@ellerman.id.au To: Matthew Wilcox Cc: Andrew Morton , linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org, Kamalesh Babulal In-Reply-To: <20080312175102.GC613@parisc-linux.org> References: <20080311011434.ad8c8d7d.akpm@linux-foundation.org> <47D7D2C9.4090001@linux.vnet.ibm.com> <20080312104645.34e58319.akpm@linux-foundation.org> <20080312175102.GC613@parisc-linux.org> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-FKcgb/W1x+QFNN+GQlWd" Date: Thu, 13 Mar 2008 09:26:09 +1100 Message-Id: <1205360769.7436.8.camel@concordia.ozlabs.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.12.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1624 Lines: 52 --=-FKcgb/W1x+QFNN+GQlWd Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2008-03-12 at 11:51 -0600, Matthew Wilcox wrote: > On Wed, Mar 12, 2008 at 10:46:45AM -0700, Andrew Morton wrote: > > On Wed, 12 Mar 2008 18:25:37 +0530 Kamalesh Babulal wrote: > > Beats me. Maybe we're still enabling interrupts too early. But the ne= w > > semaphore code got fixed (didn't it?) >=20 > On the 7th, according to my records. Easy to check -- look in > kernel/semaphore.c and see whether down() is using spin_lock_irqsave > (good) or spin_lock_irq (bad). down() looks OK, but there's still a spin_lock_irq() in __down_common(), although I don't know if it makes sense for us to be in __down() at that stage. cheers --=20 Michael Ellerman OzLabs, IBM Australia Development Lab wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183) We do not inherit the earth from our ancestors, we borrow it from our children. - S.M.A.R.T Person --=-FKcgb/W1x+QFNN+GQlWd Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBH2FiBdSjSd0sB4dIRAl2yAJ99xRvlB9Y9gSWnrlO5I81Y2WInMwCePnvQ tIC8LxVMBAH4DYX1jOsCmsk= =FYb4 -----END PGP SIGNATURE----- --=-FKcgb/W1x+QFNN+GQlWd-- -- 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/