From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754043AbcEBPNq (ORCPT ); Mon, 2 May 2016 11:13:46 -0400 Received: from mx2.suse.de ([195.135.220.15]:45959 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753941AbcEBPNp (ORCPT ); Mon, 2 May 2016 11:13:45 -0400 Subject: Re: mm: pages are not freed from lru_add_pvecs after process termination To: "Kirill A. Shutemov" References: <5720F2A8.6070406@intel.com> <572766A7.9090406@suse.cz> <20160502150109.GB24419@node.shutemov.name> Cc: Dave Hansen , "Odzioba, Lukasz" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "Shutemov, Kirill" , "Anaczkowski, Lukasz" From: Vlastimil Babka Message-ID: <57276EA6.5090907@suse.cz> Date: Mon, 2 May 2016 17:13:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <20160502150109.GB24419@node.shutemov.name> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/02/2016 05:01 PM, Kirill A. Shutemov wrote: > On Mon, May 02, 2016 at 04:39:35PM +0200, Vlastimil Babka wrote: >> On 04/27/2016 07:11 PM, Dave Hansen wrote: >>> 6. Perhaps don't use the LRU pagevecs for large pages. It limits the >>> severity of the problem. >> >> I think that makes sense. Being large already amortizes the cost per base >> page much more than pagevecs do (512 vs ~22 pages?). > > We try to do this already, don't we? Any spefic case where we have THPs on > pagevecs? For example like this? __do_huge_pmd_anonymous_page lru_cache_add_active_or_unevictable lru_cache_add