* Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > Btw, it may end up that almost nobody cares. Modern CPU's are > really good at handling the straightforward "save/restore to > stack" instructions. One of the reasons I care is not > performance per se, butu the fact that I still look at asm > code every time I do any performance profiling, and it's > absolutely horrible to see the code when you see "ugh, that's > pointless". I'm sensitive to the spinlocks in particular, > because we've gone back and forth on inlining them before, so > I've seen this. But right now I don't think we inline the lock > under normal configs *anyway*, so I guess it doesn't much > matter. Yes, right now we only inline non-debug spin_unlock() and spin_unlock_irq() [on !PREEMPT] - because that was an unconditional win. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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