Date: Thu, 22 Oct 1998 01:47:33 -0700 From: David Greenman <dg@root.com> To: john gladkih <john@simcb.ru> Cc: freebsd-bugs@FreeBSD.ORG Subject: Re: system hangs Message-ID: <199810220847.BAA02056@implode.root.com> In-Reply-To: Your message of "Thu, 22 Oct 1998 12:03:45 %2B0400." <199810220803.MAA14421@gate.simcb.ru>
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>I use SMP kernel with dual-CPU system (HP Vectra XU 6/200), 64M RAM.
>
>toor@gate[~]2:#> id
>uid=0(toor) gid=0(wheel) groups=0(wheel), 2(kmem), 3(sys), 4(tty), 5(operator), 20(staff) 31(guest)
>toor@gate[~]3:#> uname -a
>FreeBSD gate.simcb.ru 3.0-19980804-SNAP FreeBSD 3.0-19980804-SNAP #0: Sat Sep 19 08:23:32
>GMT 1998 john@gate.simcb.ru:/usr/src/sys/compile/PROXY-2CPU i386
>toor@gate[~]4:#> dd if=/dev/mem of=/dev/null
^^^^^^^^
>
>After 20 minutes later system was die. :-(
Don't do that. It's not safe to read from /dev/mem like that since it will
touch device shared memory and other things.
-DG
David Greenman
Co-founder/Principal Architect, The FreeBSD Project
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