Date: Mon, 30 Dec 2019 17:02:08 +0000 From: Alexey Dokuchaev <danfe@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: Alexander Motin <mav@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r356185 - in head: lib/geom lib/geom/sched sys/geom sys/geom/sched sys/modules/geom sys/modules/geom/geom_sched sys/sys Message-ID: <20191230170208.GA20424@FreeBSD.org> In-Reply-To: <CANCZdfq-BGXpeUHpC1MLH2kfjHvkmB8VKuGsQX6=P9EsGs=LPA@mail.gmail.com> References: <201912292116.xBTLG4kV012809@repo.freebsd.org> <20191230113243.GA58338@FreeBSD.org> <CANCZdfq-BGXpeUHpC1MLH2kfjHvkmB8VKuGsQX6=P9EsGs=LPA@mail.gmail.com>
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On Mon, Dec 30, 2019 at 08:55:14AM -0700, Warner Losh wrote: > On Mon, Dec 30, 2019, 5:32 AM Alexey Dokuchaev wrote: > > On Sun, Dec 29, 2019 at 09:16:04PM +0000, Alexander Motin wrote: > > > New Revision: 356185 > > > URL: https://svnweb.freebsd.org/changeset/base/356185 > > > > > > Log: > > > Remove GEOM_SCHED class and gsched tool. > > > [...] > > > > Wow, that was unexpected, I use it on all my machines' HDD drives. > > Is there a planned replacement, or I'd better create a port for the > > GEOM_SCHED class and gsched(8) tool? > > How much of a performance improvement do you see with it? > > There has been no tweaks to this geom in years and years. It was tuned > to 10 year old hard drives and never retuned for anything newer. Well, hard drives essentially didn't change since then, still being the same roration media. :) > And when I played with it a few years ago, I saw no improvements... Admittedly, I've only did some tests no later than in 8.4 times when I first started using it. Fair point, though, I should redo them again. ./danfe
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