Re: Waiting for bufdaemon

On Sat, 06 Mar 2021 08:33:23 +0900 (JST)
Yasuhiro Kimura <yasu_at_utahime.org> wrote:

> From: Konstantin Belousov <kostikbel_at_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