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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: References: Date: Fri, 02 Apr 2021 20:29:43 +0000 From: "Dave Cottlehuber" To: "Mathieu Chouquet-Stringer" , freebsd-fs , freebsd-current 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; dmarc=none; spf=pass (mx1.freebsd.org: domain of dch@skunkwerks.at designates 66.111.4.25 as permitted sender) smtp.mailfrom=dch@skunkwerks.at X-Spamd-Result: default: False [-2.59 / 15.00]; XM_UA_NO_VERSION(0.01)[]; TO_DN_SOME(0.00)[]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip4:66.111.4.25]; RWL_MAILSPIKE_GOOD(0.00)[66.111.4.25:from]; RCVD_COUNT_THREE(0.00)[4]; DKIM_TRACE(0.00)[skunkwerks.at:+,messagingengine.com:+]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCVD_IN_DNSWL_LOW(-0.10)[66.111.4.25:from]; RCVD_TLS_LAST(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[66.111.4.25:from]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:11403, ipnet:66.111.4.0/24, country:US]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[skunkwerks.at:s=fm2,messagingengine.com:s=fm2]; FREEFALL_USER(0.00)[dch]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; NEURAL_HAM_LONG(-1.00)[-1.000]; TAGGED_RCPT(0.00)[freebsd]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[skunkwerks.at]; SPAMHAUS_ZRD(0.00)[66.111.4.25:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MID_RHS_WWW(0.50)[]; MAILMAN_DEST(0.00)[freebsd-current,freebsd-fs] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Apr 2021 20:30:07 -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