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Fri, 5 Mar 2021 23:56:48 +0000 (UTC) Date: Sat, 6 Mar 2021 00:56:43 +0100 From: Michael Gmelin To: Yasuhiro Kimura 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> <20210306.083323.1112779300812727243.yasu@utahime.org> X-Face: $wrgCtfdVw_H9WAY?S&9+/F"!41z'L$uo*WzT8miX?kZ~W~Lr5W7v?j0Sde\mwB&/ypo^}> +a'4xMc^^KroE~+v^&^#[B">soBo1y6(TW6#UZiC]o>C6`ej+i Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAAJFBMVEWJBwe5BQDl LASZU0/LTEWEfHbyj0Txi32+sKrp1Mv944X8/fm1rS+cAAAACXBIWXMAAAsTAAAL EwEAmpwYAAAAB3RJTUUH3wESCxwC7OBhbgAAACFpVFh0Q29tbWVudAAAAAAAQ3Jl YXRlZCB3aXRoIFRoZSBHSU1QbbCXAAAAAghJREFUOMu11DFvEzEUAGCfEhBVFzuq AKkLd0O6VrIQsLXVSZXoWE5N1K3DobBBA9fQpRWc8OkWouaIjedWKiyREOKs+3PY fvalCNjgLVHeF7/3bMtBzV8C/VsQ8tecEgCcDgrzjekwKZ7TwsJZd/ywEKwwP+ZM 8P3drTsAwWn2mpWuDDuYiK1bFs6De0KUUFw0tWxm+D4AIhuuvZqtyWYeO7jQ4Aea 7jUqI+ixhQoHex4WshEvSXdood7stlv4oSuFOC4tqGcr0NjEqXgV4mMJO38nld4+ xKNxRDon7khyKVqY7YR4d+Cg0OMrkWXZOM7YDkEfKiilCn1qYv4mighZiynuHHOA Wq9QJq+BIES7lMFUtcikMnkDGHUoncA+uHgrP0ctIEqfwLHzeSo+eUA66AqzwN6n 2ZHJhw6Qh/PoyC/QENyEyC/AyNjq74Bs+3UH0xYwzDUC4B97HgLocg1QLYgDDO1v f3UX9Y307Ew4AHh67YAFFsxEpkXwpXY3eIgMhAAE3R19L919nNnuD2wlPcDE3UeT L2ytEICQib9BXgS2fU8PrD82ToYO1OEmMSnYTjSqSv9wdC0tPYC+rQRQD9ESnldF CyqfmiYW+tlALt8gH2xrMdC/youbjzPXEun+/ReXsMCDyve3dZc09fn2Oas8oXGc Jj6/fOeK5UmSMPmf/jL+GD8BEj0k/Fn6IO4AAAAASUVORK5CYII= MIME-Version: 1.0 Content-Type: text/plain; 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RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-current] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Mar 2021 23:57:01 -0000 On Sat, 06 Mar 2021 08:33:23 +0900 (JST) Yasuhiro Kimura wrote: > From: Konstantin Belousov > 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