Date: Sun, 08 Nov 1998 11:18:18 -0800 From: Mike Smith <mike@smith.net.au> To: "Brian C. Grayson" <bgrayson@marvin.ece.utexas.edu> Cc: freebsd-smp@FreeBSD.ORG Subject: Re: disk-wait problems/hangs Message-ID: <199811081918.LAA03047@dingo.cdrom.com> In-Reply-To: Your message of "Sat, 07 Nov 1998 23:36:40 CST." <19981107233640.A17996@marvin.ece.utexas.edu>
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The 'D' state isn't actually very useful; can you add 'l' to your ps args and report the WCHAN value? The latter makes it possible to narrow down where exactly things are waiting... > We're running 3.0-RELEASE on a few dual P-II boxes. > Occasionally, processes will start getting hung in 'D' > (disk-wait, IIRC), even on an otherwise-idle machine. They > never come out, they aren't kill -9'able. Once the system gets > into this state, commands like 'df' and 'ls' are likely to go into > disk-wait. Eventually (on the order of minutes/hours), > something crucial like nfsd, ypbind, or sshd gets stuck in D, > and the machine requires a reboot. > > I can reproducibly force the cascade of D problems by running > an a.out Netscape -- it gets hung after <2 CPU seconds, and > things go downhill quickly. But I believe the problems have > occurred before without the use of any a.out executables. > > Has anyone else seen this? > > Brian > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-smp" in the body of the message > -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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