Date: Thu, 20 Aug 1998 02:08:08 -0400 (EDT) From: Brian Feldman <green@unixhelp.org> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: Terry Lambert <tlambert@primenet.com>, bde@zeta.org.au, freebsd-current@FreeBSD.ORG, jwd@unx.sas.com Subject: Re: 13 months of user time? Message-ID: <Pine.BSF.4.02.9808200203190.24018-100000@zone.syracuse.net> In-Reply-To: <534.903592714@critter.freebsd.dk>
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Okay, how about we try out Mike's idea? Someone who experiences the
SIGXCPU kill problem could try putting the following in kern/kern_synch.c
line 638:
if (switchtime.tv_usec < p->p_switchtime.tv_usec ||
switchtime.tv_sec < p->p_switchtime.tv_sec)
panic("bogus microuptime twiddling");
And see if we get some nice panics and cores. Is it worth a shot? I've
never gotten a SIGXCPU out of place, so my machine wouldn't be the one to
test this on.
Cheers,
Brian Feldman
green@unixhelp.org
On Thu, 20 Aug 1998, Poul-Henning Kamp wrote:
> In message <199808200451.VAA13481@usr02.primenet.com>, Terry Lambert writes:
> >> >> It's probably a good idea to get this fixed ASAP, since people have been
> >> >> complaining about this exact bug for months now. Would anyone like to give
> >> >> me any pointers to where to start evaluating the code at, or what
> >> >> functions this could be caused by? I think I'll check the process
> >> >> accounting code first then the actual timing code, if noone has any better
> >> >> ideas.
> >> >
> >> >My suggestion would be to implement this timing using a monoclock.
> >>
> >> I fully agree, great idea Terry!
> >>
> >> We've had that for several months already :-)
> >
> >Cool! Then we can mark this bug resolved! 8-).
>
> No, we can mark your diagnosis as wrong. :-)
>
> --
> Poul-Henning Kamp FreeBSD coreteam member
> phk@FreeBSD.ORG "Real hackers run -current on their laptop."
> "ttyv0" -- What UNIX calls a $20K state-of-the-art, 3D, hi-res color terminal
>
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