From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f44.google.com (mail-pb0-f44.google.com [209.85.160.44]) by kanga.kvack.org (Postfix) with ESMTP id CA87D6B0036 for ; Mon, 7 Oct 2013 11:12:47 -0400 (EDT) Received: by mail-pb0-f44.google.com with SMTP id xa7so7277189pbc.31 for ; Mon, 07 Oct 2013 08:12:47 -0700 (PDT) Message-ID: <5252CF5A.4000003@redhat.com> Date: Mon, 07 Oct 2013 11:12:26 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH 10/63] mm: Do not flush TLB during protection change if !pte_present && !migration_entry References: <1381141781-10992-1-git-send-email-mgorman@suse.de> <1381141781-10992-11-git-send-email-mgorman@suse.de> In-Reply-To: <1381141781-10992-11-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Peter Zijlstra , Srikar Dronamraju , Ingo Molnar , Andrea Arcangeli , Johannes Weiner , Linux-MM , LKML On 10/07/2013 06:28 AM, Mel Gorman wrote: > NUMA PTE scanning is expensive both in terms of the scanning itself and > the TLB flush if there are any updates. Currently non-present PTEs are > accounted for as an update and incurring a TLB flush where it is only > necessary for anonymous migration entries. This patch addresses the > problem and should reduce TLB flushes. > > Signed-off-by: Mel Gorman Reviewed-by: Rik van Riel -- All rights reversed -- 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