From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751868AbbIOUI3 (ORCPT ); Tue, 15 Sep 2015 16:08:29 -0400 Received: from mail-wi0-f171.google.com ([209.85.212.171]:32941 "EHLO mail-wi0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750862AbbIOUI2 (ORCPT ); Tue, 15 Sep 2015 16:08:28 -0400 Date: Tue, 15 Sep 2015 23:08:21 +0300 From: Ebru Akagunduz To: Andrew Morton Cc: linux-mm@kvack.org, kirill.shutemov@linux.intel.com, n-horiguchi@ah.jp.nec.com, aarcange@redhat.com, riel@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 Message-ID: <20150915200820.GA4188@debian> References: <1442259105-4420-1-git-send-email-ebru.akagunduz@gmail.com> <1442259105-4420-3-git-send-email-ebru.akagunduz@gmail.com> <20150914143355.cd75506c0605c5d6c9a4bb03@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150914143355.cd75506c0605c5d6c9a4bb03@linux-foundation.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 14, 2015 at 02:33:55PM -0700, Andrew Morton wrote: > On Mon, 14 Sep 2015 22:31:44 +0300 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. > > We we please get this control documented? > Documentation/vm/transhuge.txt appears to be the place for it. I will add annotation about max_swap_ptes to doc and send it with new patch. Kind regards, Ebru