From owner-freebsd-hackers@freebsd.org Thu Apr 16 16:25:37 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 17C052C0FED for ; Thu, 16 Apr 2020 16:25:37 +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 4934Mh20jFz3Dqn for ; Thu, 16 Apr 2020 16:25:36 +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 03GGPVA2004660 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 16 Apr 2020 18:25:31 +0200 (CEST) (envelope-from puchar-wojtek@puchar.net) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=puchar.net; s=default; t=1587054331; bh=KDHFWjXF9eyuDwdtv71B+bTRhZFaf0m+ASHjJu1yvMA=; h=Date:From:To:cc:Subject:In-Reply-To:References; b=GGP9x2WVsiVM0Y3hC5xywQDN6JCDA79OrHlJ8f6ChwdunEZPPXO5LeK643QhWx5AH bVKKI2e+fE4FKQ0LthmzeSvulWKq3mPOz/w7Ogj6wsrmTQ1gRkkfeOKCElYf3lNEQX H6z7Gu3JW/IYHACkQW/fHGtYIXYdeA6mHBiNSB+s= Received: from localhost (puchar-wojtek@localhost) by puchar.net (8.15.2/8.15.2/Submit) with ESMTP id 03GGPV4e004657; Thu, 16 Apr 2020 18:25:31 +0200 (CEST) (envelope-from puchar-wojtek@puchar.net) Date: Thu, 16 Apr 2020 18:25:30 +0200 (CEST) From: Wojciech Puchar To: Eugene Grosbein cc: Wojciech Puchar , freebsd-hackers@freebsd.org Subject: Re: fsck parallel check In-Reply-To: Message-ID: References: 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: 4934Mh20jFz3Dqn X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=fail (rsa verify failed) header.d=puchar.net header.s=default header.b=GGP9x2WV; 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 [-3.75 / 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:c]; 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(-2.45)[ip: (-6.47), ipnet: 194.1.144.0/24(-3.24), asn: 43476(-2.59), country: PL(0.06)]; 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: Thu, 16 Apr 2020 16:25:37 -0000 > Quoting the manual: > > In other words: In preen mode all pass 1 partitions are checked > sequentially. Next all pass 2 partitions are checked in parallel, one > process per disk drive. Next all pass 3 partitions are checked in > parallel, one process per disk drive. etc. Yes i've read this manual. "Next all pass 2 partitions are checked in parallel, one process per disk drive." so having 5 partitions on one SSD - it will be checked sequentially. > Also note that "one process per disk" refers to old traditional partition numbering > like da0s1a, da0s1d, da0s1e that fsck recognises as belonging to same "disk" > but not to newer label-based mount like /dev/ufs/root, /dev/ufs/var or /dev/mirror/m0s1a etc. > so it runs it all in parallel unless you deny it using different pass numbers. > i use /dev/gpt/gptlabel naming. so it will check in parallel.