Date: Sat, 4 Jul 1998 14:10:02 -0700 (PDT) From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: freebsd-bugs@FreeBSD.ORG Subject: Re: kern/7141 Message-ID: <199807042110.OAA15153@freefall.freebsd.org>
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The following reply was made to PR kern/7141; it has been noted by GNATS.
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
To: freebsd-gnats-submit@freebsd.org
Cc: Subject: Re: kern/7141
Date: Sat, 04 Jul 1998 23:07:30 +0200
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Date: Sat, 4 Jul 1998 16:26:31 -0400 (EDT)
From: Carl Mascott <cmascott@world.std.com>
Message-Id: <199807042026.QAA00325@europa.my.pc>
To: phk@FreeBSD.ORG
Subject: Re: kern/7141
X-UIDL: bfc34456bf3e3ffe3de2fea2b1af13a8
> 1. Are you sure your swapdevice is configured and works (swapinfo(1))
Device 1K-blocks Used Avail Capacity Type
/dev/sd0s2b 98304 9376 88864 10% Interleaved
> 2. Can you reproduce it ?
Alas, no. I didn't write down where I set the breakpoint.
I tried gdb on calctool again with a few different breakpoints
and couldn't reproduce the freeze.
I also wrote a test program called memhog that allocates
however many megabytes you tell it to from the command line.
When the system runs out of RAM you can see the swap disk
activity. This test program runs fine. When run as root
in single-user mode it is able to allocate 63 MB.
> 3. Can you compile DDB into the kernel and reproduce it from the console
> and try to break into the debugger (Ctrl+Alt+Esc) and send us the output
> from a "trace" command ?
Even if I could reproduce the freeze this would not do any
good. As I said, when the kernel freezes the keyboard is
dead. Even CTL-ALT-DEL doesn't work. It would be impossible
to get into the debugger.
Since I can't reproduce this myself I certainly can't tell
you how to reproduce it. I guess there is nothing more
you can do about this problem at this time.
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