Date: Thu, 01 May 2008 17:49:12 +0100 From: Gavin Atkinson <gavin@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: FreeBSD Stable <freebsd-stable@FreeBSD.org>, d@delphij.net Subject: Re: What does system do after "Uptime: "? Message-ID: <1209660552.68622.53.camel@buffy.york.ac.uk> In-Reply-To: <200804301544.20802.jhb@freebsd.org> References: <481560AC.90109@delphij.net> <1209376409.59233.14.camel@buffy.york.ac.uk> <4818BF27.2080209@delphij.net> <200804301544.20802.jhb@freebsd.org>
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On Wed, 2008-04-30 at 15:44 -0400, John Baldwin wrote: > On Wednesday 30 April 2008 02:49:11 pm Xin LI wrote: > > Gavin Atkinson wrote: > > | On Sun, 2008-04-27 at 22:29 -0700, Xin LI wrote: > > |> Hi, > > |> > > |> Just wonder what the system would do after Uptime: during reboot? Will > > |> there be any callbacks be called? I have received some report regarding > > |> hangs after this, and IIRC the only operation is to IPI BSP to do reboot? > > | > > | Several callbacks are called after that message. Anything that > > | registers with the shutdown_post_sync or shutdown_final event handler, > > | for example, and the dump routine if you are using "reboot -d". > > | > > | Before trying to diagnose this, however, make sure you are running with > > | sys/dev/usb/ehci_pci.c 1.30 (which has also been MFC'd to 6/7), as that > > | seems to have been the cause of most of the recently reported "hangs > > | after printing uptime" PRs. > > > > I see... It seems that this is the culprit. > > > > To John: Do you think it's worthy to make this an errata to the > > supported RELENG_6_X and RELENG_7_0 branches? > > If someone wants to push re@ to do that they can, but my experience with > getting re@ to actually get errata fixes has me skeptical (I think I had > patches for about 6 or 7 panics or kernel deadlocks for 6.2 that never got > pushed as errata patches). FWIW, there have been probably around 10 PRs in in the last few months about this behaviour. I'd vote for it as an errata candidate. Gavinhome | help
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