Andrew Morton a écrit : > On Mon, 2 Feb 2009 11:20:09 -0700 > Jonathan Corbet <corbet@xxxxxxx> wrote: > >> Matt Mackall suggested converting epoll's ep_lock to a bitlock as a way of >> saving space in struct file. This patch makes that change. > > hrm. bit_spin_lock() makes people upset (large penguiny people). iirc > it doesn't have all the correct/well-understood memory/compiler > ordering semantics which spinlocks have. And lockdep doesn't know about > it. > In a previous attempt (2005), I suggested using a single global lock. http://search.luky.org/linux-kernel.2005/msg50862.html Probably an array of hashed spinlocks would be more than enough. -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
