Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755688AbZDPLkd (ORCPT ); Thu, 16 Apr 2009 07:40:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753723AbZDPLkW (ORCPT ); Thu, 16 Apr 2009 07:40:22 -0400 Received: from mx2.redhat.com ([66.187.237.31]:38070 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753050AbZDPLkV (ORCPT ); Thu, 16 Apr 2009 07:40:21 -0400 Date: Thu, 16 Apr 2009 13:39:31 +0200 From: Andrea Arcangeli To: Jeremy Fitzhardinge Cc: Andrew Morton , Izik Eidus , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, avi@redhat.com, chrisw@redhat.com, mtosatti@redhat.com, hugh@veritas.com, kamezawa.hiroyu@jp.fujitsu.com Subject: Re: [PATCH 4/4] add ksm kernel shared memory driver. Message-ID: <20090416113931.GF4524@random.random> References: <1239249521-5013-1-git-send-email-ieidus@redhat.com> <1239249521-5013-2-git-send-email-ieidus@redhat.com> <1239249521-5013-3-git-send-email-ieidus@redhat.com> <1239249521-5013-4-git-send-email-ieidus@redhat.com> <1239249521-5013-5-git-send-email-ieidus@redhat.com> <20090414150929.174a9b25.akpm@linux-foundation.org> <49E67F17.1070805@goop.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <49E67F17.1070805@goop.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 558 Lines: 11 On Wed, Apr 15, 2009 at 05:43:03PM -0700, Jeremy Fitzhardinge wrote: > Shouldn't that be kmap_atomic's job anyway? Otherwise it would be hard to No because those are full noops in no-highmem kernels. I commented in other email why I think it's safe thanks to the wrprotect + smp tlb flush of the userland PTE. -- 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/