Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized,don't nop it out

From: Jeremy Fitzhardinge
Date: Thu Oct 06 2011 - 17:42:42 EST


On 10/06/2011 12:28 PM, Steven Rostedt wrote:
>> (2) Always reserve 5 bytes of space, but if the distance is small enough
>> patch in a 2-byte jump. That doesn't help with the icache footprint.
> I don't think this one is worth it.

I disagree. This is what I benchmarked as having a 5% improvement. If
squashing out the padding helps, then that's a separate optimisation.

J
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/