Kprobes support for IA64

[Ananth N Mavinakayanahalli]

Keshavamurthy, Anil S wrote:

Hi Anil,

> Hi All,
> 	I have posted the Kprobes support for IA64 to Andrew for
> inclusion into
> his mm tree and cc'ing systemtap, linux-ia64 and linux-kernel mailing
> list. For some reason it is not showing up on systemtap mailing list. So
> though of letting people on this mailing list know about the same.
> 
> Here is the link to the patches which has been posted.
> http://marc.theaimsgroup.com/?l=linux-kernel&m=111686392713936&w=2
> http://marc.theaimsgroup.com/?l=linux-kernel&m=111686371307789&w=2
> http://marc.theaimsgroup.com/?l=linux-kernel&m=111686420206738&w=2
> http://marc.theaimsgroup.com/?l=linux-kernel&m=111686392701700&w=2
> http://marc.theaimsgroup.com/?l=linux-kernel&m=111686420210427&w=2
> 
> Any feedback/comments/testing are welcome.

Great job! I noticed one minor thing with the port though - you don't 
seem to have defined JPROBE_ENTRY for ia64.

I worked with Prarit Bhargava (SGI) today to show the usage of 
kprobes/jprobes on ia64. Everything worked fine, except for a consistent:

-bash: child setpgid (xxx to xxx): No such process
                       ^^^    ^^^ pids of bash
message during rmmod of a jprobe module. Not sure why this message comes 
up though. The machine we were testing on was a 16-way Altix box I think.

Ananth