Re: [PATCH]: Add Network Sysrq Support

On 06/22/2011 06:54 AM, Florian Westphal wrote:

Prarit Bhargava [off-list ref] wrote:

[ cc'd John Haxby, who worked on xt_SYSREQ ]

  

quoted

On 06/21/2011 06:58 PM, David Miller wrote:
    

quoted

From: Florian Westphal <fw@strlen.de>
Date: Wed, 22 Jun 2011 00:56:45 +0200
      

quoted

This is one of the reasons why I still think that
xt_SYSREQ would be the better solution, you get all
kinds of filtering features for free.

You could even use crazy things like '-m time' to restrict
sysreq availability to working hours and whatnot.

        

Agreed.
      

Using the netfilter xt-SYSRQ code seems to store the entered code and
execute it later after the system has returned to a normal state....
which is much too late to be useful.
    

The target handler of the kernel part invokes handle_sysrq(),
I don't see any delaying/queueing?
  

Yeah ... It just occurred to me on the way into the office that I made a
mistake.

... What if the "slow down" I'm seeing is due to the network layer?  ...
but why would ping work and the xt_SYSRQ not work? 

Either way ... I have a feeling that I'm on to something,

P.