From owner-freebsd-hackers@freebsd.org Fri Jan 10 12:25:50 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 0D0411E5FE4 for ; Fri, 10 Jan 2020 12:25:50 +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 47vMdm5Cdqz4Xqy; Fri, 10 Jan 2020 12:25:48 +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 00ACPegP060528 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 10 Jan 2020 13:25:41 +0100 (CET) (envelope-from puchar-wojtek@puchar.net) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=puchar.net; s=default; t=1578659142; bh=OPCzf3MXk77Rg/NU2zj7VnosbVh9O/sdvj7+GOh1w0g=; h=Date:From:To:cc:Subject:In-Reply-To:References; b=iKcZN5B8Yp0UXRiYTwTzAqRafLt4EKCjKnOlA1YRoNBsx8miNga3jJ3dju6tpl+0n ip83HEn+7fP9FB9nsbSQ0ALpSYwGtt2cL3EWzQNCHVNiHt3S3j9U/xhkHwHvWyNdHv Ql4haNoPhIdnY1ycOGHRew/AwpZHic37OyEN0wy0= Received: from localhost (puchar-wojtek@localhost) by puchar.net (8.15.2/8.15.2/Submit) with ESMTP id 00ACPeDc060514; Fri, 10 Jan 2020 13:25:40 +0100 (CET) (envelope-from puchar-wojtek@puchar.net) Date: Fri, 10 Jan 2020 13:25:40 +0100 (CET) From: Wojciech Puchar To: Peter Jeremy cc: Gary Jennejohn , Hans Petter Selasky , Rick Macklem , Conrad Meyer , "freebsd-hackers@freebsd.org" , Wojciech Puchar , Konstantin Belousov Subject: Re: maximum MAXBSIZE In-Reply-To: <20200109204943.GC25924@server.rulingia.com> Message-ID: References: <20200108105136.0d54ebce@ernst.home> <20200108141810.GX23031@kib.kiev.ua> <20200109164519.33fc7478@ernst.home> <20200109204943.GC25924@server.rulingia.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: 47vMdm5Cdqz4Xqy X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=fail (rsa verify failed) header.d=puchar.net header.s=default header.b=iKcZN5B8; 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 [-4.29 / 15.00]; ARC_NA(0.00)[]; TO_DN_EQ_ADDR_SOME(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; 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_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]; RCPT_COUNT_SEVEN(0.00)[8]; IP_SCORE(-2.99)[ip: (-7.90), ipnet: 194.1.144.0/24(-3.95), asn: 43476(-3.16), country: PL(0.07)]; 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]; FREEMAIL_CC(0.00)[gmail.com]; 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: Fri, 10 Jan 2020 12:25:50 -0000 >>> i think 4MB is OK for HDDs, more may be optimal for RAID5 arrays. >> >> POLA (principle of least amazement). I certainly don't need a MAXPHYS set >> to 4MB on my desktop machine. > > What are the downsides of running with MAXPHYS set to 4MB (or similar)? For now i do not observe any. I will post if i do.