Tejun Heo <t...@kernel.org> writes: >> It also implements two stage shutdown, as we need it to tear down the >> percpu counts. Before dropping the initial refcount, you must call >> percpu_ref_kill(); this puts the refcount in "shutting down mode" and >> switches back to a single atomic refcount with the appropriate barriers >> (synchronize_rcu()). > > Maybe if we have tryget() which only succeeds if the counter is alive, > we can replace moulde refcnt with this? Rusty?
Yes, it's similar (hence my previous interest), though module count is a bit weird. Like Tejun, I'd prefer to see it always alloc up-front, because it avoids the _noalloc variant (which is backwards: please hand gfp_t, so you don't hide the alloc) and heuristics. Cheers, Rusty. -- 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/
