From owner-freebsd-fs@freebsd.org Sun Aug 26 18:03:21 2018 Return-Path: Delivered-To: freebsd-fs@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 C8646107D53A for ; Sun, 26 Aug 2018 18:03:21 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 621888A16E for ; Sun, 26 Aug 2018 18:03:21 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 27114107D539; Sun, 26 Aug 2018 18:03:21 +0000 (UTC) Delivered-To: fs@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 13290107D538 for ; Sun, 26 Aug 2018 18:03:21 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9D0398A16D for ; Sun, 26 Aug 2018 18:03:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id EB2F7A7CB for ; Sun, 26 Aug 2018 18:03:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w7QI3Jix025664 for ; Sun, 26 Aug 2018 18:03:19 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w7QI3JGb025663 for fs@FreeBSD.org; Sun, 26 Aug 2018 18:03:19 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 223786] Remounting a UFS filesystem read-only takes very long time Date: Sun, 26 Aug 2018 18:03:19 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.4-STABLE X-Bugzilla-Keywords: regression X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: mi@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: fs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Aug 2018 18:03:22 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D223786 Mikhail Teterin changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mi@FreeBSD.org --- Comment #6 from Mikhail Teterin --- Seeing this manifested pretty bad today - on a freshly-rebuilt world (r338291M). The other thing that changed is the RAM upgrade -- from 10GB to 40GB. Could it be, the kernel is trying to flush ALL filesystems, rather than just the one being remounted? Because, unlike the / on UFS, other filesystems co= uld be quite busy... While waiting, I press Ctrl-T once in a while, and get: root@narawntapu:/etc/mail (1022) mount -oro -u / load: 0.93 cmd: mount 26321 [biowr] 230.01r 0.00u 9.01s 2% 2224k load: 0.47 cmd: mount 26321 [biowr] 283.84r 0.00u 10.99s 1% 2224k load: 0.57 cmd: mount 26321 [biowr] 318.95r 0.00u 12.25s 2% 2224k The actual change to the /-filesystem is trivial. --=20 You are receiving this mail because: You are the assignee for the bug.=