From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751633AbbINTrc (ORCPT ); Mon, 14 Sep 2015 15:47:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56719 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751127AbbINTrb (ORCPT ); Mon, 14 Sep 2015 15:47:31 -0400 Message-ID: <55F7244D.9010605@redhat.com> Date: Mon, 14 Sep 2015 15:47:25 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Ebru Akagunduz , linux-mm@kvack.org CC: akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, n-horiguchi@ah.jp.nec.com, aarcange@redhat.com, iamjoonsoo.kim@lge.com, xiexiuqi@huawei.com, gorcunov@openvz.org, linux-kernel@vger.kernel.org, mgorman@suse.de, rientjes@google.com, vbabka@suse.cz, aneesh.kumar@linux.vnet.ibm.com, hughd@google.com, hannes@cmpxchg.org, mhocko@suse.cz, boaz@plexistor.com, raindel@mellanox.com Subject: Re: [RFC v5 2/3] mm: make optimistic check for swapin readahead References: <1442259105-4420-1-git-send-email-ebru.akagunduz@gmail.com> <1442259105-4420-3-git-send-email-ebru.akagunduz@gmail.com> In-Reply-To: <1442259105-4420-3-git-send-email-ebru.akagunduz@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/14/2015 03:31 PM, Ebru Akagunduz wrote: > This patch introduces new sysfs integer knob > /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_swap > which makes optimistic check for swapin readahead to > increase thp collapse rate. Before getting swapped > out pages to memory, checks them and allows up to a > certain number. It also prints out using tracepoints > amount of unmapped ptes. This may need some more refinement in the future, but your patch series seems to create a large improvement over what we have now. > Signed-off-by: Ebru Akagunduz Acked-by: Rik van Riel -- All rights reversed