Date: Tue, 17 Jan 2017 17:08:58 -0800 From: Cy Schubert <Cy.Schubert@komquats.com> To: John Baldwin <jhb@freebsd.org> Cc: Cy Schubert <Cy.Schubert@komquats.com>, Hans Petter Selasky <hps@selasky.org>, FreeBSD Current <freebsd-current@freebsd.org>, Konstantin Belousov <kib@freebsd.org> Subject: Re: Strange issue after early AP startup Message-ID: <201701180108.v0I18wd1035225@slippy.cwsent.com> In-Reply-To: Message from John Baldwin <jhb@freebsd.org> of "Tue, 17 Jan 2017 13:26:27 -0800." <1492450.XZfNz8zFfg@ralph.baldwin.cx>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <1492450.XZfNz8zFfg@ralph.baldwin.cx>, John Baldwin writes: > On Tuesday, January 17, 2017 12:53:19 PM Cy Schubert wrote: > > In message <b9c53237-4b1a-a140-f692-bf5837060b18@selasky.org>, Hans Petter > > Sela > > sky writes: > > > Hi, > > > > > > When booting I observe an additional 30-second delay after this print: > > > > > > > Timecounters tick every 1.000 msec > > > > > > ~30 second delay and boot continues like normal. > > > > > > Checking "vmstat -i" reveals that some timers have been running loose. > > > > > > > cpu0:timer 44300 442 > > > > cpu1:timer 40561 404 > > > > cpu3:timer 48462822 483058 > > > > cpu2:timer 48477898 483209 > > > > > > Trying to add delays and/or prints around the Timecounters printout > > > makes the issue go away. Any ideas for debugging? > > > > > > Looks like a startup race to me. > > > > just picking a random email to reply to, I'm seeing a different issue with > > early AP startup. It affects one of my four machines, my laptop. My three > > server systems downstairs have no problem however my laptop will reboot > > repeatedly at: > > > > Jan 17 11:55:16 slippy kernel: cd0: Attempt to query device size failed: > > NOT READY, Medium not present - tray closed > > So it panics and reboots after this? Yes, it goes into a panic/reboot loop for a few iterations until it successfully boots. Disabling early AP startup allows it to boot up without the assumed race. -- Cheers, Cy Schubert <Cy.Schubert@cschubert.com> FreeBSD UNIX: <cy@FreeBSD.org> Web: http://www.FreeBSD.org The need of the many outweighs the greed of the few.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201701180108.v0I18wd1035225>