From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id EA1A16B00D9 for ; Mon, 5 Jan 2009 21:29:58 -0500 (EST) Date: Mon, 5 Jan 2009 18:29:41 -0800 (PST) From: Linus Torvalds Subject: Re: [patch] mm: fix lockless pagecache reordering bug (was Re: BUG: soft lockup - is this XFS problem?) In-Reply-To: <20090106020550.GA819@wotan.suse.de> Message-ID: References: <20090105041959.GC367@wotan.suse.de> <20090105064838.GA5209@wotan.suse.de> <49623384.2070801@aon.at> <20090105164135.GC32675@wotan.suse.de> <20090105180008.GE32675@wotan.suse.de> <20090105201258.GN6959@linux.vnet.ibm.com> <20090105215727.GQ6959@linux.vnet.ibm.com> <20090106020550.GA819@wotan.suse.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Nick Piggin Cc: "Paul E. McKenney" , Peter Klotz , stable@kernel.org, Linux Memory Management List , Christoph Hellwig , Roman Kononov , linux-kernel@vger.kernel.org, xfs@oss.sgi.com, Andrew Morton List-ID: On Tue, 6 Jan 2009, Nick Piggin wrote: > > Sticking an rcu_dereference in radix_tree_deref_slot seems to fix the > assembly for me too, I grafted the changelog onto that. Linus probably > you are using -Os? Ahh, yes. I am. That explains why I can't see any difference. Linus -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org