Re(5): kernel dump server
Re(5): kernel dump server
- Subject: Re(5): kernel dump server
- From: Peter Lovell <email@hidden>
- Date: Tue, 31 Jan 2006 09:18:50 -0500
On Dec 27, 2005, at 10:20 AM, Derek Kumar wrote:
If, for some reason, the ARP resolution broadcast for the server fails, the debugger will attempt to route the crashdump packets via the cached default route (the debugger's "network stack" is a fairly minimalist, polled implementation, and doesn't query routing tables and so on, which may or may not be valid post-panic), and if the router doesn't forward packets arriving at the internal interface addressed to internal nodes, you may see a timeout. You can either try and determine why the resolution fails, or reconfigure your router as appropriate.
A future update should address/ameliorate these issues.
Hi Derek,
I submitted rdar://4422761 a couple of days ago, and included an updated kdp_udp.c which solves this problem. Main issue was that there was no ARP request code there at all, and now there is. This also ARPs for the router_ip if that is defined in boot-args (this capability was mentioned in the code as a future enhancement).
Since it was in the same file, I also updated the code for creating the dump file name so that it now includes the xnu minor version. Notes in the code suggest that rdar://3735061 requested this capability.
Regards.....Peter
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