From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) by kanga.kvack.org (Postfix) with ESMTP id 6A6B36B0006 for ; Wed, 31 Oct 2018 03:32:29 -0400 (EDT) Received: by mail-ed1-f70.google.com with SMTP id h25-v6so10299457eds.21 for ; Wed, 31 Oct 2018 00:32:29 -0700 (PDT) Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id g5-v6si11088428eje.11.2018.10.31.00.32.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 31 Oct 2018 00:32:27 -0700 (PDT) Date: Wed, 31 Oct 2018 08:32:25 +0100 From: Michal Hocko Subject: Re: Caching/buffers become useless after some time Message-ID: <20181031072721.GH32673@dhcp22.suse.cz> References: <20180829150136.GA10223@dhcp22.suse.cz> <20180829152716.GB10223@dhcp22.suse.cz> <6e3a9434-32f2-0388-e0c7-2bd1c2ebc8b1@suse.cz> <20181030152632.GG32673@dhcp22.suse.cz> <98305976-612f-cf6d-1377-2f9f045710a9@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <98305976-612f-cf6d-1377-2f9f045710a9@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: Marinko Catovic , linux-mm@kvack.org, Christopher Lameter On Tue 30-10-18 18:00:23, Vlastimil Babka wrote: [...] > I suspect there are lots of short-lived processes, so these are probably > rapidly recycled and not causing compaction. It also seems to be pgd > allocation (2 pages due to PTI) not kernel stack? I guess you are right. I have misread order=2 yesterday. order=1 stack would be quite unexpected. -- Michal Hocko SUSE Labs