Date: Sat, 6 Mar 2021 00:56:43 +0100 From: Michael Gmelin <freebsd@grem.de> To: Yasuhiro Kimura <yasu@utahime.org> Cc: freebsd-current@freebsd.org Subject: Re: Waiting for bufdaemon Message-ID: <20210306005643.45feb56d@bsd64.grem.de> In-Reply-To: <20210306.083323.1112779300812727243.yasu@utahime.org> References: <20210128.050242.1986722766748729591.yasu@utahime.org> <20210305.160311.867123118349124334.yasu@utahime.org> <YEKYDlPuvn6TL4xs@kib.kiev.ua> <20210306.083323.1112779300812727243.yasu@utahime.org>
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On Sat, 06 Mar 2021 08:33:23 +0900 (JST) Yasuhiro Kimura <yasu@utahime.org> wrote: > From: Konstantin Belousov <kostikbel@gmail.com> > Subject: Re: Waiting for bufdaemon > Date: Fri, 5 Mar 2021 22:43:58 +0200 > > > My belief is that this commit helps more users than it hurts. > > Namely, the VMWare and KVM users, which are majority, use fast > > timecounter, comparing to the more niche hypervisors like > > VirtualBox. > > > > For you, a simple but manual workaround, setting the timecounter to > > ACPI (?) or might be HPET, with a loader tunable, should do it. > > Then please let me know the name of it. > > I have experienced same situation several time. That is, I faced a > problem and asked for it on ML. Then I was told to try some tunable. > So I thought there may be tunable that can be used as workaround in > this case. But for those who isn't familiar with kernel internal, it > it quite hard to find it without knowing its name. If all tunable were > listed with brief explanation in one document, then I saw it and could > pick up possible candidates. But actually they are documented > separately among many man pages. So the first difficulty is to find > man page in which possible tunable may be explained. If the problem is > releted to some device, it is most hopeful to check its man page. But > in this case, even after reading the commit message, I had no idea > which man page to check. > see `man 4 timecounters': https://www.freebsd.org/cgi/man.cgi?query=timecounters -m -- Michael Gmelin
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