Re: 4BSD Scheduler Problem on 5.3

From: Poul-Henning Kamp (phk_at_phk.freebsd.dk)
Date: 04/01/05

  • Next message: Robert Watson: "Re: 4BSD Scheduler Problem on 5.3" 
    To: John Baldwin <jhb@FreeBSD.org>
Date: Fri, 01 Apr 2005 20:52:38 +0200

    In message <200504011120.27285.jhb@FreeBSD.org>, John Baldwin writes:

    >> I think we have a race in -STABLE relating to tty wakeups and
    >> open/close/device teardown. I've seen a panic relating to sio during a
    >> tty close on RELENG_5 about 5-6 months ago, but was unable to get a dump.
    >> Scott has since fixed dumps with twe, but I've not yet been able to get
    >> the bug to recur. I'll give it another try.
    >
    >Sounds very plausible. Does Poul-Henning have any ideas?

    Is this before or after my tty changes ?

    There is a general nastyness about ttys/sessions/exit which I have
    never really felt comfortable about. My hope is that I have solved
    it by refcounting the tty structure.

    So if this is before my changes: "Yeah, known (but rare) issue)"

    If after my changes: "D**N!" 

    -- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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  • Next message: Robert Watson: "Re: 4BSD Scheduler Problem on 5.3"