From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99B59C43381 for ; Tue, 26 Mar 2019 09:01:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 563D120863 for ; Tue, 26 Mar 2019 09:01:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553590906; bh=2caQ5ME99w7Qf1zXwB8fLFNzMC4UDO3qQ5HeDsmCJXs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=t9mq3G7i5Fz+SS7ZIxjhaqocrvhs8C7xMBSCmhNcDBJATEoXIF4IoNUWSWO2i/o4I J5lqUd20SRrfahTL0y0uQDCn5g2/6Xz/qWO5z4v6DMESDh/s2+a8u1lGUGRZCDqn/R ylf6P+3cvswOCT3x6kU0OqI2ib8x/r/BOcK31aLw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727956AbfCZJBp (ORCPT ); Tue, 26 Mar 2019 05:01:45 -0400 Received: from mx2.suse.de ([195.135.220.15]:35982 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725535AbfCZJBo (ORCPT ); Tue, 26 Mar 2019 05:01:44 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 75AA9AD65; Tue, 26 Mar 2019 09:01:43 +0000 (UTC) Date: Tue, 26 Mar 2019 10:01:42 +0100 From: Michal Hocko To: Pankaj Suryawanshi Cc: Kirill Tkhai , Vlastimil Babka , "aneesh.kumar@linux.ibm.com" , "linux-kernel@vger.kernel.org" , "minchan@kernel.org" , "linux-mm@kvack.org" , "khandual@linux.vnet.ibm.com" Subject: Re: [External] Re: vmscan: Reclaim unevictable pages Message-ID: <20190326090142.GH28406@dhcp22.suse.cz> References: <0b86dbca-cbc9-3b43-e3b9-8876bcc24f22@suse.cz> <56862fc0-3e4b-8d1e-ae15-0df32bf5e4c0@virtuozzo.com> <4c05dda3-9fdf-e357-75ed-6ee3f25c9e52@virtuozzo.com> <09b6ee71-0007-7f1d-ac80-7e05421e4ec6@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [You were asked to use a reasonable quoting several times. This is really annoying because it turns the email thread into a complete mess] On Tue 26-03-19 07:53:14, Pankaj Suryawanshi wrote: > Is there anyone who is familiar with this? Please Comment. Not really. You are observing an unexpected behavior of the page reclaim which hasn't changed for quite some time. So I find more probable that your non-vanilla kernel is doing something unexpected. It would help if you could track down how does the unevictable page get down to the reclaim path. I assume this is a CMA page or something like that but those shouldn't get to the reclaim path AFIR. -- Michal Hocko SUSE Labs