From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f176.google.com (mail-qk0-f176.google.com [209.85.220.176]) by kanga.kvack.org (Postfix) with ESMTP id 9D8936B006E for ; Thu, 16 Apr 2015 11:52:41 -0400 (EDT) Received: by qku63 with SMTP id 63so135445156qku.3 for ; Thu, 16 Apr 2015 08:52:41 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id d68si8639273qhc.84.2015.04.16.08.52.40 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 Apr 2015 08:52:40 -0700 (PDT) Message-ID: <552FDABC.3060705@redhat.com> Date: Thu, 16 Apr 2015 11:52:28 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH 2/4] mm: Send a single IPI to TLB flush multiple pages when unmapping References: <1429179766-26711-1-git-send-email-mgorman@suse.de> <1429179766-26711-3-git-send-email-mgorman@suse.de> In-Reply-To: <1429179766-26711-3-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman , Linux-MM Cc: Hugh Dickins , Minchan Kim , Dave Hansen , Andi Kleen , LKML On 04/16/2015 06:22 AM, Mel Gorman wrote: > If a clean page is unmapped and not immediately flushed, the > architecture must guarantee that a write to that page from a CPU > with a cached TLB entry will trap a page fault. > > This is essentially what the kernel already depends on but the window is > much larger with this patch applied and is worth highlighting. > Signed-off-by: Mel Gorman Given the architectural guarantee ... Reviewed-by: Rik van Riel -- 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: email@kvack.org