From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linus Torvalds Subject: Re: [patch 2/2]: introduce fast_gup Date: Thu, 17 Apr 2008 11:28:45 -0700 (PDT) Message-ID: References: <20080328025455.GA8083@wotan.suse.de> <20080328030023.GC8083@wotan.suse.de> <1208444605.7115.2.camel@twins> <1208448768.7115.30.camel@twins> <1208450119.7115.36.camel@twins> <1208453014.7115.39.camel@twins> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: In-Reply-To: <1208453014.7115.39.camel@twins> Sender: linux-arch-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To: Peter Zijlstra Cc: Nick Piggin , Andrew Morton , shaggy-V7BBcbaFuwjMbYB6QlFGEg@public.gmane.org, axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Clark Williams , Ingo Molnar , Jeremy Fitzhardinge On Thu, 17 Apr 2008, Peter Zijlstra wrote: > > D'0h - clearly not my day today... Ok, I'm acking this one ;) And yes, it would be nice if the gup patches would go in early, since I wouldn't be entirely surprised if other architectures didn't have some other subtle issues here. We've never accessed the page tables without locking before, so we've only had races with hardware, never software. Linus From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:54150 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761985AbYDQS3f (ORCPT ); Thu, 17 Apr 2008 14:29:35 -0400 Date: Thu, 17 Apr 2008 11:28:45 -0700 (PDT) From: Linus Torvalds Subject: Re: [patch 2/2]: introduce fast_gup In-Reply-To: <1208453014.7115.39.camel@twins> Message-ID: References: <20080328025455.GA8083@wotan.suse.de> <20080328030023.GC8083@wotan.suse.de> <1208444605.7115.2.camel@twins> <1208448768.7115.30.camel@twins> <1208450119.7115.36.camel@twins> <1208453014.7115.39.camel@twins> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-arch-owner@vger.kernel.org List-ID: To: Peter Zijlstra Cc: Nick Piggin , Andrew Morton , shaggy@austin.ibm.com, axboe@kernel.dk, linux-mm@kvack.org, linux-arch@vger.kernel.org, Clark Williams , Ingo Molnar , Jeremy Fitzhardinge Message-ID: <20080417182845.RozWh8zfwCTkRgUoI5oz1wJINp0BvGEOl52NvD2Mb5w@z> On Thu, 17 Apr 2008, Peter Zijlstra wrote: > > D'0h - clearly not my day today... Ok, I'm acking this one ;) And yes, it would be nice if the gup patches would go in early, since I wouldn't be entirely surprised if other architectures didn't have some other subtle issues here. We've never accessed the page tables without locking before, so we've only had races with hardware, never software. Linus