Re: Freezes on heavy disk I/O

From: Panagiotis Astithas (past_at_noc.ntua.gr)
Date: 05/21/04

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    Date: Fri, 21 May 2004 18:59:50 +0300
To: "Konstantin 'Kosta' Welke" <damaker@fillibach.de>

    Konstantin 'Kosta' Welke wrote:
    > Hi!
    >
    > I've got a box running FreeBSD 5.2.1. Sometimes, it just
    > freezes. Doesn't react to _any_thing except a hard reset.
    >
    > This is reproductable in some cases, all involving mainly
    > disk I/O.
    >
    > 1) When burning a CD (on another computer) from a samba share
    > on the freebsd box, the box repliably freezes. This also
    > happens when I'm encoding a DVD rip to avi on my windows box,
    > while the DVD files are on the freebsd samba server.
    >
    > 2) When doing stuff like portupgrade -a, it often (but always
    > at different files/ports) freezes. This happens especially
    > often when compiling gcc. (That's why I'm using the package now).
    >
    > 3) Sometimes it just freezes like this, when playing an mp3,
    > surfing the 'net, etc.
    >
    > I used memtest enabling all test for 9 hours finding no errors.
    > Also, it's no overheating problem as it is not overclocked
    > nor is there any hot air coming out of the CPU fan when those
    > freezes occur.
    >
    > Any ideas?

    I have similar observations in my 5.2.1 machine. The recurring theme has
    always been that I was running under X and the freeze killed the
    console, although the machine responded to ping.

    When I tried the same action (a "portsdb -uU" or "portupgrade -a" in my
    case) from a virtual console I saw a panic. Since this never happens on
    my -current machine, I believe it is something already fixed in the tree.

    Cheers, 

    -- 
Panagiotis Astithas
Electrical & Computer Engineer, PhD
Network Management Center
National Technical University of Athens, Greece
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