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[195.135.220.15]) by mx.google.com with ESMTPS id s8si33711564eda.92.2019.08.06.08.11.25 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Aug 2019 08:11:26 -0700 (PDT) Received-SPF: softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=mhocko@kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org 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) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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