From owner-freebsd-arm@freebsd.org Wed Aug 15 13:46:26 2018 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3DC6C1085351 for ; Wed, 15 Aug 2018 13:46:26 +0000 (UTC) (envelope-from freebsd-arm@sentry.org) Received: from shadow.sentry.org (shadow.sentry.org [210.8.237.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "shadow.sentry.org", Issuer "COMODO RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 68EC28D896 for ; Wed, 15 Aug 2018 13:46:25 +0000 (UTC) (envelope-from freebsd-arm@sentry.org) Received: from shadow.sentry.org (localhost [127.0.0.1]) by shadow.sentry.org (8.15.2/8.15.2) with ESMTP id w7F0KFkx067502 for ; Wed, 15 Aug 2018 10:20:15 +1000 (AEST) (envelope-from freebsd-arm@sentry.org) Subject: Re: RPI3 swap experiments (grace under pressure) To: freebsd-arm@freebsd.org References: <20180812173248.GA81324@phouka1.phouka.net> <20180812224021.GA46372@www.zefox.net> <20180813021226.GA46750@www.zefox.net> <0D8B9A29-DD95-4FA3-8F7D-4B85A3BB54D7@yahoo.com> <20180813185350.GA47132@www.zefox.net> <20180814014226.GA50013@www.zefox.net> <02fe39af-a02c-fb6a-70b0-da3b7fd06c22@goodgas.com.au> <20180814213107.GA51051@www.zefox.net> From: Trev Message-ID: <2f3bed05-b27e-420b-e831-1c8286edf35e@sentry.org> Date: Wed, 15 Aug 2018 10:20:15 +1000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.4 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (shadow.sentry.org [0.0.0.0]); Wed, 15 Aug 2018 10:20:15 +1000 (AEST) X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Aug 2018 13:46:26 -0000 George Mitchell wrote on 15/08/2018 08:33: > On 08/14/18 18:17, Jedi Tek'Unum wrote: >> I firmly disagree with the entire concept of out of memory killers. Th= ey are simply evil and in my opinion a complete cop-out. I first encounte= red this kind of kludge back in the =E2=80=9880s with AIX. It was bad the= n and it still is today. Frankly I find it ridiculous that they still exi= st. >> [...] >=20 > However: consider the subject (Raspberry Pi). -- George When researching whether 512M of RAM was considered "usable" for a=20 FreeBSD buildworld, I came across [https://reviews.freebsd.org/D8302]=20 from October 2016 where just 256M was considered a test case for i386=20 and amd64 (-j1 I'm assuming) buildworlds which should succeed. Regardless, my RPi3B+ OOMA issues were completely eliminated by=20 replacing the 16G SanDisk "Ultra" card with a "faster" 32G SanDisk=20 "Extreme" card which contains all file systems as well as a swap=20 partition and runs -j4 buildworld flawlessly. I think this lends some=20 support to Warner's view.