Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759391AbaGXOqH (ORCPT ); Thu, 24 Jul 2014 10:46:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57684 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759007AbaGXOqG (ORCPT ); Thu, 24 Jul 2014 10:46:06 -0400 Date: Thu, 24 Jul 2014 16:44:49 +0200 From: Andrea Arcangeli To: Joerg Roedel Cc: Andrew Morton , Peter Zijlstra , Rik van Riel , Hugh Dickins , Mel Gorman , Johannes Weiner , Jerome Glisse , jroedel@suse.de, Jay.Cornwall@amd.com, Oded.Gabbay@amd.com, John.Bridgman@amd.com, Suravee.Suthikulpanit@amd.com, ben.sander@amd.com, Jesse Barnes , David Woodhouse , linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org Subject: Re: [PATCH 0/3] mmu_notifier: Allow to manage CPU external TLBs Message-ID: <20140724144449.GC27715@redhat.com> References: <1406212541-25975-1-git-send-email-joro@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1406212541-25975-1-git-send-email-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 24, 2014 at 04:35:38PM +0200, Joerg Roedel wrote: > To solve this situation I wrote a patch-set to introduce a > new notifier call-back: mmu_notifer_invalidate_range(). This > notifier lifts the strict requirements that no new > references are taken in the range between _start() and > _end(). When the subsystem can't guarantee that any new > references are taken is has to provide the > invalidate_range() call-back to clear any new references in > there. > > It is called between invalidate_range_start() and _end() > every time the VMM has to wipe out any references to a > couple of pages. This are usually the places where the CPU > TLBs are flushed too and where its important that this > happens before invalidate_range_end() is called. > > Any comments and review appreciated! Reviewed-by: Andrea Arcangeli -- 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/