From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 23 Jun 2003 10:10:16 +0200 From: Andrea Arcangeli Subject: Re: [PATCH] Fix vmtruncate race and distributed filesystem race Message-ID: <20030623081016.GI19940@dualathlon.random> References: <20030612134946.450e0f77.akpm@digeo.com> <20030612140014.32b7244d.akpm@digeo.com> <150040000.1055452098@baldur.austin.ibm.com> <20030612144418.49f75066.akpm@digeo.com> <184910000.1055458610@baldur.austin.ibm.com> <20030620001743.GI18317@dualathlon.random> <20030623032842.GA1167@us.ibm.com> <20030622233235.0924364d.akpm@digeo.com> <20030623074353.GE19940@dualathlon.random> <20030623005623.5fe1ab30.akpm@digeo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030623005623.5fe1ab30.akpm@digeo.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: paulmck@us.ibm.com, dmccr@us.ibm.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Mon, Jun 23, 2003 at 12:56:23AM -0700, Andrew Morton wrote: > Andrea Arcangeli wrote: > > > > that will finally close the race > > Could someone please convince me that we really _need_ to close it? > > The VM handles the whacky pages OK (on slowpaths), and when this first came > up two years ago it was argued that the application was racy/buggy > anyway. So as long as we're secure and stable, we don't care. Certainly > not to the point of adding more atomic ops on the fastpath. > > So... what bug are we actually fixing here? we're fixing userspace data corruption with an app trapping SIGBUS. > > > (I'd also like to see a clearer description of the distributed fs problem, > and how this fixes it). I certainly would like discussions about it too. Andrea -- 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: aart@kvack.org