From owner-freebsd-hackers@freebsd.org Mon Jan 6 10:03:54 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D85E41FFA90 for ; Mon, 6 Jan 2020 10:03:54 +0000 (UTC) (envelope-from wojtek@puchar.net) Received: from puchar.net (puchar.net [194.1.144.90]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 47rrgr6KmDz4WV6 for ; Mon, 6 Jan 2020 10:03:52 +0000 (UTC) (envelope-from wojtek@puchar.net) Received: Received: from 127.0.0.1 (localhost [127.0.0.1]) by puchar.net (8.15.2/8.15.2) with ESMTPS id 006A3HCi001052 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 6 Jan 2020 11:03:21 +0100 (CET) (envelope-from puchar-wojtek@puchar.net) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=puchar.net; s=default; t=1578305002; bh=ji78ecgUMIEmHeomcSOA7agb5IGypqwTPldss8nDTl0=; h=Date:From:To:cc:Subject:In-Reply-To:References; b=icrucvEm9C9bcwfj/P/uU45hZH8kmFXwzLxEZVxqW8pI1jYOD1nzkdKXFFWRrvbfr y/sUdQ0dSKfCqKGNP6mD7Xcug3ec7mlsfYGVG3Qy8a08hobRwxhOS1EoOwK4WFyurr 4dWlG4RBwiI4cELdJJ/Anx6OMGn/C6EwSD1p6LMg= Received: from localhost (puchar-wojtek@localhost) by puchar.net (8.15.2/8.15.2/Submit) with ESMTP id 0069WDl8028108; Mon, 6 Jan 2020 10:32:13 +0100 (CET) (envelope-from puchar-wojtek@puchar.net) Date: Mon, 6 Jan 2020 10:32:13 +0100 (CET) From: Wojciech Puchar To: Mark Millard cc: Wojciech Puchar , freebsd-hackers@freebsd.org Subject: Re: processes are killed because of out of swap space In-Reply-To: Message-ID: References: <9C6B115C-90CC-449D-A29D-429BD97F37C4@yahoo.com> User-Agent: Alpine 2.20 (BSF 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Rspamd-Queue-Id: 47rrgr6KmDz4WV6 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=fail (rsa verify failed) header.d=puchar.net header.s=default header.b=icrucvEm; dmarc=none; spf=pass (mx1.freebsd.org: domain of wojtek@puchar.net designates 194.1.144.90 as permitted sender) smtp.mailfrom=wojtek@puchar.net X-Spamd-Result: default: False [-4.38 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; R_SPF_ALLOW(-0.20)[+mx]; R_DKIM_REJECT(1.00)[puchar.net:s=default]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[puchar.net]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[puchar.net:-]; RCVD_IN_DNSWL_NONE(0.00)[90.144.1.194.list.dnswl.org : 127.0.10.0]; IP_SCORE(-3.08)[ip: (-8.15), ipnet: 194.1.144.0/24(-4.08), asn: 43476(-3.26), country: PL(0.07)]; FREEMAIL_TO(0.00)[yahoo.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:43476, ipnet:194.1.144.0/24, country:PL]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Jan 2020 10:03:54 -0000 > context. > > If anyone is to work on geom_raid5, knowledge that: > > A) it was getting OOM kills that the other technique did not > and: > B) vm.pageout_oom_seq changes were controlling when > > likely would be useful background information. I > wonder if a bugzilla report of such would be > appropriate. (Some detail about the time frames > for the alternative vm.pageout_oom_seq figures might > be appropriate.) > > === geom_raid5 seems to be more buggy. I was aware that it write buffers data so in case of power loss there would be damage, but i've set 3 second maximum caching time and got huge destruction of underlaying filesystem (fsck displayed hundreds of thousands of errors).