On Mon, 2013-05-13 at 16:44 +0800, Li Zhong wrote: > Yes, the above and hash_page() are two C functions for a same exception. > And the exception hooks enable RCU usage in those C codes. But for asm > codes, I think we could assume that there would be no RCU usage there, > so we don't need wrap them in the hooks.
hash_page() won't start a new RCU, at least not in its current incarnation, the only thing I can see it ever doing would be to take some RCU read locks one day (it doesn't today). low_hash_fault() is a different beast. It will typically kill things, thus involving sending signals etc... RCU might well be involved. Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
