On 03/19/2013 08:36 AM, Steven Rostedt wrote:
> On Tue, 2013-03-19 at 15:10 +0000, David Howells wrote:
>> Steven Rostedt <rost...@goodmis.org> wrote:
>>
>>> Why? If we remove the tracepoint from the slowpath and use a table swap,
>>> then we wouldn't need to use the slowpath at all.
>>
>> How are you engineering a table swap? Do you patch the system call code to
>> change the immediate address loaded or do you put in a level of indirection?
>
> Patching the call site would probably be the easiest method.
>
> We've gotten pretty good at doing that ;-)
>
Yes, given that the machinery is already there we might as well use it.
-hpa
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