Re: panic with heavy writing on md device

From: Ronald Klop (ronald-freebsd7_at_klop.yi.org)
Date: 06/30/04

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    Date: Wed, 30 Jun 2004 03:11:17 +0200
To: Brian Fundakowski Feldman <green@freebsd.org>

    On Tue, 29 Jun 2004 19:52:21 -0400, Brian Fundakowski Feldman
    <green@freebsd.org> wrote:

    > On Tue, Jun 29, 2004 at 11:11:51PM +0200, Ronald Klop wrote:
    >> Hello,
    >>
    >> I got a panic while doing a lot of IO on a md device.
    >> I attached a gdb backtrace of the kernelcore and a dmesg output.
    >>
    >> It happened while untarring a 30 MB tar on the background (&) and
    >> traversing this new directory in the meantime.
    >>
    >> uname -a
    >> FreeBSD guido.thuis.klop.ws 5.2-CURRENT FreeBSD 5.2-CURRENT #1: Fri Jun
    >> 25
    >> 04:03:35 CEST 2004
    >> root@guido.thuis.klop.ws:/usr/obj/usr/src/sys/GUIDO i386
    >>
    >> On the same time I was playing music with mpg123, but that doesn't make
    >> use of the md device.
    >>
    >> I have had this more and always while doing a lot of IO on the md
    >> device.
    >>
    >> Is there more info you need?
    >
    > It looks like there is a memory leak -- in general, you are not supposed
    > to run out of kernel virtual memory address space unless you have a
    > dire misconfiguration somewhere.
    >
    > Unfortunately, I think the most useful pieces of information (zone and
    > malloc allocation) are not fetchable via kvm anymore. Here's a fix for
    > vmstat so that you can provide vmstat -m output using the -M and -N
    > args again. I think vmstat -c output would also be useful.

    Thanks, I solved it. See my other thread about kmem_malloc.
    I thought that was about another error, so I opened a new thread.

    Greetings,

    Ronald. 

    -- 
  Ronald Klop
  Amsterdam, The Netherlands
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