From: Andrew Morton <akpm@osdl.org>
To: linux-ia64@vger.kernel.org
Subject: Re: [RFC] prevent "dd if=/dev/mem" crash
Date: Sat, 18 Oct 2003 01:41:11 +0000 [thread overview]
Message-ID: <marc-linux-ia64-106644129923832@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-106642876514553@msgid-missing>
Matt Chapman <matthewc@cse.unsw.edu.au> wrote:
>
> It *does* signal a fault, in the form of a machine check. On other
> architectures I'm familiar with this is usually implemented as an
> interrupt, but the idea is similar - when the system bus controller
> detects a bad address on the bus, it returns all 1s (for a read) and
> signals an interrupt.
I see. That seems OK. At least it means that software can implement a
probing function and that the time interval between hot unplug and handling
the unplug interrupt can be managed appropriately.
next prev parent reply other threads:[~2003-10-18 1:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-17 22:10 [RFC] prevent "dd if=/dev/mem" crash Bjorn Helgaas
2003-10-17 22:19 ` Luck, Tony
2003-10-17 22:23 ` Matt Mackall
2003-10-17 22:40 ` Andreas Schwab
2003-10-17 22:50 ` Andrew Morton
2003-10-17 23:25 ` Bjorn Helgaas
2003-10-17 23:55 ` Andrew Morton
2003-10-18 0:15 ` William Lee Irwin III
2003-10-18 0:21 ` David Mosberger
2003-10-18 0:49 ` Andrew Morton
2003-10-18 1:31 ` Matt Chapman
2003-10-18 1:41 ` Andrew Morton [this message]
2003-10-18 1:48 ` David Mosberger
2003-10-18 2:01 ` Andrew Morton
2003-10-18 2:01 ` Matt Chapman
2003-10-19 11:25 ` Eric W. Biederman
2003-10-19 18:17 ` Pavel Machek
2003-10-19 19:01 ` William Lee Irwin III
2003-10-20 15:17 ` Bjorn Helgaas
2003-10-20 17:42 ` Bjorn Helgaas
2003-10-20 18:48 ` David Mosberger
2003-10-23 8:33 ` Martin Pool
2003-10-23 9:31 ` Zoltan Menyhart
2003-10-23 21:05 ` Bjorn Helgaas
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