Date: Sun, 05 Jan 2014 15:26:23 -0700 From: Ian Lepore <ian@FreeBSD.org> To: kpneal@pobox.com Cc: freebsd-stable@FreeBSD.org Subject: Re: How to make boot wait a few seconds more for device response? Message-ID: <1388960783.1158.328.camel@revolution.hippie.lan> In-Reply-To: <20140105221507.GA70312@neutralgood.org> References: <43.76.14229.524B7C25@cdptpa-oedge01> <52C7EC3E.6070709@grosbein.net> <20140104213749.GA60414@neutralgood.org> <1388873531.1158.306.camel@revolution.hippie.lan> <674003.48630.bm@smtp114.sbc.mail.gq1.yahoo.com> <1388936456.1158.308.camel@revolution.hippie.lan> <466613.61666.bm@smtp120.sbc.mail.bf1.yahoo.com> <1388956579.1158.326.camel@revolution.hippie.lan> <20140105221507.GA70312@neutralgood.org>
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On Sun, 2014-01-05 at 17:15 -0500, kpneal@pobox.com wrote:
> On Sun, Jan 05, 2014 at 02:16:19PM -0700, Ian Lepore wrote:
> > On Sun, 2014-01-05 at 21:06 +0000, Thomas Mueller wrote:
> > > > I don't know whether it's documented anywhere, I just remembered seeing
> > > > it in the source when I was working on a change to nfs root filesystems,
> > > > so I grepped and re-found it yesterday. I think it's set in terms of
> > > > whole seconds.
> > >
> > > -- Ian
> > >
> > > This was for vfs.mountroot.timeout .
> > >
> > > There needs to be better documentation. I have already searched for too many needles in the haystack and lost a lot of time that way.
> > >
> > > I could type "show" at loader prompt, but figure only a small chance of finding everything, output may be sketchy.
> > >
> > > So I still don't know whether it should be seconds or milliseconds.
> > >
> > > Where did you find it in the source tree? I made another search, unsuccessful, for the needle in the haystack.
> > >
> > > Tom
> >
> > Yes, for vfs.mountroot.timeout the units are whole seconds.
> >
> > It's implemented in src/sys/kern/vfs_mountroot.c
>
> Is this in 9.2-RELEASE? I'm looking at that file myself and I can't see
> where exactly that option is checked. I do see this:
>
> parse_dir_ask_printenv("vfs.root.mountfrom");
> parse_dir_ask_printenv("vfs.root.mountfrom.options");
>
> I also see ".timeout" checked when parsing input from somewhere. I can't
> tell where exactly it is coming from, though. But I can't see where it
> checks specifically for "vfs.mountroot.timeout".
>
> Am I misreading it? Or is it not present in 9.2-RELEASE?
>
> Sorry to be a pain on this, but I'm looking to avoid trouble with a
> machine I'm upgrading remotely. I want to be sure before I pull the
> trigger.
Hrm, it looks like in 9.2-RELEASE it's just hard-coded to 3 seconds and
not tuneable. In 9-stable it's tuneable.
-- Ian
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