Messages in this thread | | | Date | Fri, 2 Nov 2007 09:51:27 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [patch 1/4] x86: FIFO ticket spinlocks |
| |
On Fri, 2 Nov 2007, Chuck Ebbert wrote: > > There's also a very easy way to get better fairness with our current spinlocks: > use xchg to release the lock instead of mov.
That does nothing at all.
Yes, it slows the unlock down, which in turn on some machines will make it easier for another core/socket to get it, but it's purely about the slowdown, nothing else.
Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |