Waiting for bufdaemon

Chris bsd-lists at bsdforge.com
Sat Mar 6 02:53:48 UTC 2021


On 2021-03-05 15:33, Yasuhiro Kimura 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.
Not exactly what you're asking for. But sysctl sysctl(3) and loader(8)
will provide some good clues.

HTH

--Chris
> 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.
> 
> ---
> Yasuhiro Kimura
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