Date: Fri, 01 Apr 2005 20:52:38 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: John Baldwin <jhb@FreeBSD.org> Cc: Robert Watson <rwatson@FreeBSD.org> Subject: Re: 4BSD Scheduler Problem on 5.3 Message-ID: <89197.1112381558@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 01 Apr 2005 11:20:27 CDT." <200504011120.27285.jhb@FreeBSD.org>
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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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