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Fri, 2 Apr 2021 16:30:05 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-273-g8500d2492d-fm-20210323.002-g8500d249 Mime-Version: 1.0 Message-Id: <3c00c109-ed5a-496c-9339-22b3dc31747a@www.fastmail.com> In-Reply-To: <YGQ6IyE6B31a6EV0@weirdfishes> References: <YFhuxr0qRzchA7x8@weirdfishes> <YF8eL0dmSh6H8HX2@ceres.zyxst.net> <YF9YE282kOWN7ubr@weirdfishes> <YGMq6i+UIhNANHXW@weirdfishes> <YGQ6IyE6B31a6EV0@weirdfishes> Date: Fri, 02 Apr 2021 20:29:43 +0000 From: "Dave Cottlehuber" <dch@skunkwerks.at> To: "Mathieu Chouquet-Stringer" <me+freebsd@mathieu.digital>, freebsd-fs <freebsd-fs@freebsd.org>, freebsd-current <freebsd-current@freebsd.org> Cc: bryanv@freebsd.org Subject: Re: Scrub incredibly slow with 13.0-RC3 (as well as RC1 & 2) Content-Type: text/plain X-Rspamd-Queue-Id: 4FBs9p6ycPz3rdc X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=skunkwerks.at header.s=fm2 header.b=LjlKuosR; dkim=pass header.d=messagingengine.com header.s=fm2 header.b=pFWw6N+r; 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TO_MATCH_ENVRCPT_SOME(0.00)[]; MID_RHS_WWW(0.50)[]; MAILMAN_DEST(0.00)[freebsd-current,freebsd-fs] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Filesystems <freebsd-fs.freebsd.org> List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-fs>, <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs/> List-Post: <mailto:freebsd-fs@freebsd.org> List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help> List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-fs>, <mailto:freebsd-fs-request@freebsd.org?subject=subscribe> X-List-Received-Date: Fri, 02 Apr 2021 20:30:08 -0000 On Wed, 31 Mar 2021, at 09:00, Mathieu Chouquet-Stringer wrote: > On Tue, Mar 30, 2021 at 03:43:06PM +0200, Mathieu Chouquet-Stringer wrote: > > Hello, > > > > TL;DR: we need kvmclock support in FreeBSD > > scan: scrub repaired 0B in 12:33:11 with 0 errors on Wed Mar 31 03:33:14 2021 > > It's almost twice as fast with kvmclock support... Does the issue also go away if you use `TSC-slow` ? I investigated exactly this issue yesterday[1], and it's great to see Bryan's patch resurrected, I will try it here and report back too. [1]: https://hackmd.io/HhYlbsDJTpCWHSwlrwrY_w A+ Dave