From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 8E5266B0047 for ; Wed, 1 Apr 2009 19:33:14 -0400 (EDT) Subject: Re: [patch] mm: close page_mkwrite races From: Trond Myklebust In-Reply-To: <20090401160241.ec2f4573.akpm@linux-foundation.org> References: <20090330135307.GP31000@wotan.suse.de> <20090330135613.GQ31000@wotan.suse.de> <20090401160241.ec2f4573.akpm@linux-foundation.org> Content-Type: text/plain Date: Wed, 01 Apr 2009 19:33:31 -0400 Message-Id: <1238628811.18376.4.camel@heimdal.trondhjem.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Andrew Morton Cc: Sage Weil , npiggin@suse.de, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org List-ID: On Wed, 2009-04-01 at 16:02 -0700, Andrew Morton wrote: > What is "the problem"? Can we get "the problem"'s description included > in the changelog? > > The patch is fairly ugly, somewhat costly and makes things (even) more > complex. Sigh. The problem is that currently, pages can be marked as dirty after they have been written out, or even during writeout. IOW: the filesystem and the mm no longer agree on the state of the page, which again triggers issues such as http://bugzilla.kernel.org/show_bug.cgi?id=12913 Trond -- 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