Messages in this thread | | | Date | Thu, 19 Apr 2001 09:43:42 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: light weight user level semaphores |
| |
On Thu, 19 Apr 2001, Alexander Viro wrote: > > I certainly agree that introducing ioctl() in _any_ API is a shootable > offense. However, I wonder whether we really need any kernel changes > at all.
I'd certainly be interested in seeing the pipe-based approach. Especially if you make the pipe allocation lazy. That isn'tr trivial (it needs to be done right with both up_failed() and down_failed() trying to allocate the pipe on contention and using an atomic cmpxchg-style setting if none existed before). It has the BIG advantage of working on old kernels, so that you don't need to have backwards compatibility cruft in the libraries.
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/
| |