From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f71.google.com (mail-pa0-f71.google.com [209.85.220.71]) by kanga.kvack.org (Postfix) with ESMTP id E4E0C6B0253 for ; Mon, 2 May 2016 11:49:07 -0400 (EDT) Received: by mail-pa0-f71.google.com with SMTP id zy2so299608930pac.1 for ; Mon, 02 May 2016 08:49:07 -0700 (PDT) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTP id a13si19011708pfc.215.2016.05.02.08.49.07 for ; Mon, 02 May 2016 08:49:07 -0700 (PDT) Subject: Re: mm: pages are not freed from lru_add_pvecs after process termination References: <5720F2A8.6070406@intel.com> <572766A7.9090406@suse.cz> <20160502150109.GB24419@node.shutemov.name> From: Dave Hansen Message-ID: <572776EF.2070804@intel.com> Date: Mon, 2 May 2016 08:49:03 -0700 MIME-Version: 1.0 In-Reply-To: <20160502150109.GB24419@node.shutemov.name> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" , Vlastimil Babka Cc: "Odzioba, Lukasz" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "Shutemov, Kirill" , "Anaczkowski, Lukasz" On 05/02/2016 08:01 AM, 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? Lukas was hitting this on a RHEL 7 era kernel. In his kernel at least, I'm pretty sure THP's were ending up on pagevecs. Are you saying you don't think we're doing that any more? -- 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