Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 20 Feb 2003 17:54:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 20 Feb 2003 17:54:30 -0500 Received: from havoc.daloft.com ([64.213.145.173]:42397 "EHLO havoc.gtf.org") by vger.kernel.org with ESMTP id ; Thu, 20 Feb 2003 17:54:29 -0500 Date: Thu, 20 Feb 2003 18:04:30 -0500 From: Jeff Garzik To: Trond Myklebust Cc: Andrea Arcangeli , Andrew Morton , Marc-Christian Petersen , t.baetzler@bringe.com, linux-kernel@vger.kernel.org, marcelo@conectiva.com.br Subject: Re: xdr nfs highmem deadlock fix [Re: filesystem access slowing system to a crawl] Message-ID: <20030220230430.GX9800@gtf.org> References: <200302191742.02275.m.c.p@wolk-project.de> <20030219174940.GJ14633@x30.suse.de> <200302201629.51374.m.c.p@wolk-project.de> <20030220103543.7c2d250c.akpm@digeo.com> <20030220215457.GV31480@x30.school.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 993 Lines: 28 On Thu, Feb 20, 2003 at 11:56:14PM +0100, Trond Myklebust wrote: > >>>>> " " == Andrea Arcangeli writes: > > > 2.5.62 has the very same deadlock condition in xdr triggered by > > nfs too. > > Andrew, if you're forward porting it yourself like with the > > filebacked vma merging feature just let me know so we make sure > > not to duplicate effort. > > For 2.5.x we should rather fix MSG_MORE so that it actually works > instead of messing with hacks to kmap(). > > For 2.4.x, Hirokazu Takahashi had a patch which allowed for a safe > kmap of > 1 page in one call. Appended here as an attachment FYI > (Marcelo do *not* apply!). One should also consider kmap_atomic... (bcrl suggest) Jeff - 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/