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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
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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