From: David Daney <david.s.daney@gmail.com>
To: "wilbur.chan" <wilbur512@gmail.com>
Cc: Linux MIPS Mailing List <linux-mips@linux-mips.org>,
David Daney <ddaney@caviumnetworks.com>
Subject: Re: [octeon]segment without execution priviledge,causing system down.
Date: Tue, 27 Apr 2010 22:01:49 -0700 [thread overview]
Message-ID: <4BD7C13D.6060609@gmail.com> (raw)
In-Reply-To: <r2pe997b7421004271829rffc1e685ic649ce3b53325271@mail.gmail.com>
On 04/27/2010 06:29 PM, wilbur.chan wrote:
> I'm using a modified kernel version derived from 2.6.21.7,and the cpu
> is octeon cn5860. Strangely I found that , when executing
>
> some instruction in un-executable segment, the system will hang on,
> together with console down, and could not response to ping
>
> command.
>
[...]
> Any one knows why this happened? Thanks
>
I think I know.
There is a bug in your kernel. Since execute inhibit support was not
added to the upstream kernel until very recently, we must assume you got
your kernel from some vendor. You could either ask the vendor for a
fix, or back port it yourself from:
http://www.linux-mips.org/git?p=linux.git;a=commitdiff;h=6dd9344cfc41bcc60a01cdc828cb278be7a10e01
David Daney
prev parent reply other threads:[~2010-04-28 5:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-28 1:29 [octeon]segment without execution priviledge,causing system down wilbur.chan
2010-04-28 5:01 ` David Daney [this message]
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