From: "Karel Kulhavý" <clock@twibright.com>
To: linux-kernel@vger.kernel.org
Subject: cat /dev/hdb > /dev/null DoS
Date: Thu, 8 Apr 2004 08:55:18 +0000 [thread overview]
Message-ID: <20040408085518.B4607@beton.cybernet.src> (raw)
Hello
I have 2.8 GHz Pentium IV with 1GB RAM and 250GB ATA-133 IDE disk
on /dev/hdb.
I did cat /dev/hdb > /dev/null and after a while (5 minutes),
the system went totally unresponsive:
1) man top takes 3 minutes to display man page
2) Switching between console and X takes also a couple of minutes
3) top shows this:
Cpu(s): 1.4% us, 1.4% sy, 0.0% ni, 0.0% id, 0.0% wa, 97.3% hi, 0.0% si
/dev/hdb is auxilliary disk that is not used, is not mounted and the
root filesystem doesn't reside on it (of course). Kernel version is 2.6.3.
Is this behaviour normal?
Cl<
next reply other threads:[~2004-04-08 8:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-08 8:55 Karel Kulhavý [this message]
2004-04-08 10:36 ` cat /dev/hdb > /dev/null DoS Sven Köhler
2004-04-09 0:10 ` Sven Köhler
2004-04-09 6:47 ` Denis Vlasenko
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