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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 B9A8CC31E40 for ; Tue, 6 Aug 2019 15:11:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8FFEA2089E for ; Tue, 6 Aug 2019 15:11:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565104288; bh=aX7OaxDyIXCYVzhN6BLBIQYD7oD/7QrGiAZXFyWSNzQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=0t1SB74E2OIkDF57xptU+UvaktA59yX683m7j0ZLatXQu1KNzdhwbITGzqiwCpEst FVuoTRXRdEkcIF5GbvTDnuHciZLUWizZRvq/XN4zhbOg4eC67vjmPDhXpfpMgfPJRe YQi7a/Vlweho42v6gcNoxcdqJIofsdsv835JYuw8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731969AbfHFPL1 (ORCPT ); Tue, 6 Aug 2019 11:11:27 -0400 Received: from mx2.suse.de ([195.135.220.15]:47392 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726713AbfHFPL0 (ORCPT ); Tue, 6 Aug 2019 11:11:26 -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 5BEFFAE65; Tue, 6 Aug 2019 15:11:25 +0000 (UTC) Date: Tue, 6 Aug 2019 17:11:23 +0200 From: Michal Hocko To: Pankaj Suryawanshi Cc: Vlastimil Babka , linux-kernel@vger.kernel.org, linux-mm@kvack.org, pankaj.suryawanshi@einfochips.com Subject: Re: oom-killer Message-ID: <20190806151123.GI11812@dhcp22.suse.cz> References: <20190805112437.GF7597@dhcp22.suse.cz> <0821a17d-1703-1b82-d850-30455e19e0c1@suse.cz> <20190805120525.GL7597@dhcp22.suse.cz> 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 On Tue 06-08-19 20:25:51, Pankaj Suryawanshi wrote: [...] > lowmem reserve ? it is min_free_kbytes or something else. Nope. Lowmem rezerve is a measure to protect from allocations targetting higher zones (have a look at setup_per_zone_lowmem_reserve). The value for each zone depends on the amount of memory managed by the zone and the ratio which can be tuned from the userspace. min_free_kbytes controls reclaim watermarks. -- Michal Hocko SUSE Labs