From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264855AbUGCFQK (ORCPT ); Sat, 3 Jul 2004 01:16:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264893AbUGCFQK (ORCPT ); Sat, 3 Jul 2004 01:16:10 -0400 Received: from mx1.redhat.com ([66.187.233.31]:19343 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S264855AbUGCFQG (ORCPT ); Sat, 3 Jul 2004 01:16:06 -0400 Date: Sat, 3 Jul 2004 07:15:34 +0200 From: Arjan van de Ven To: Chris Caputo Cc: Marcelo Tosatti , linux-kernel@vger.kernel.org Subject: Re: inode_unused list corruption in 2.4.26 - spin_lock problem? Message-ID: <20040703051534.GA4998@devserv.devel.redhat.com> References: <20040625121743.GA24896@logos.cnet> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3MwIy2ne0vdjdPXF" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --3MwIy2ne0vdjdPXF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Jul 02, 2004 at 01:00:19PM -0700, Chris Caputo wrote: > On Fri, 25 Jun 2004, Marcelo Tosatti wrote: > > On Wed, Jun 23, 2004 at 06:50:48PM -0700, Chris Caputo wrote: > > > Is it safe to assume that the x86 version of atomic_dec_and_lock(), which > > > iput() uses, is well trusted? I figure it's got to be, but doesn't hurt > > > to ask. > > > > Pretty sure it is, used all over. You can try to use non-optimize version > > at lib/dec_and_lock.c for a test. > > My current theory is that occasionally when irqbalance changes CPU > affinities that the resulting set_ioapic_affinity() calls somehow cause > either inter-CPU locking or cache coherency or ??? to fail. or.... some spinlock is just incorrect and having the irqbalance irqlayout unhides that.. irqbalance only balances very very rarely so I doubt it's the cause of anything... --3MwIy2ne0vdjdPXF Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFA5kD2xULwo51rQBIRAg2GAJ93mfmiiES+pttYGvASVYX2OPemNgCePKR4 lnZYsF+SCkhlxVVQ4a8JQ9I= =RKvh -----END PGP SIGNATURE----- --3MwIy2ne0vdjdPXF--