Messages in this thread | | | Date | Mon, 25 Oct 2010 14:54:33 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints |
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On 10/20/2010 08:27 AM, Jason Baron wrote: > > sure. The idea of the 'jmp 0' was simply to be an lcd for x86, if > there's a better lcd for x86, I'll update it. But note, that since the > 'jmp 0' is patched to a better nop at boot, we wouldn't see much gain. > And in the boot path we are using 'text_poke_early()', so avoiding that > isn't going to improve things much. >
It's still a completely unnecessary waste of startup time some potentially significant fraction of the time. Startup time matters, especially as the number of tracepoints grow.
-hpa
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