Hello, Christoph. On Mon, Jan 25, 2016 at 09:49:42AM +0100, Christoph Hellwig wrote: > FYI, my use case was also related to percpu-ref. The percpu ref API > is unfortunately really hard to use and will almost always involve > a work queue due to the complex interaction between percpu_ref_kill > and percpu_ref_exit. One thing that would help a lot of callers would That's interesting. Can you please elaborate on how kill and exit interact to make things complex? > be a percpu_ref_exit_sync that kills the ref and waits for all references > to go away synchronously. That shouldn't be difficult to implement. One minor concern is that it's almost guaranteed that there will be cases where the synchronicity is exposed to userland. Anyways, can you please describe the use case? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
