On Wed, 11 Dec 2013 20:06:37 -0500 Paul Gortmaker <[email protected]> wrote:
> From: Thomas Gleixner <[email protected]> > > The wait_queue is a swiss army knife and in most of the cases the > full complexity is not needed. Here we provide a slim version, as > it lowers memory consumption and runtime overhead. > > The concept originated from RT, where waitqueues are a constant > source of trouble, as we can't convert the head lock to a raw > spinlock due to fancy and long lasting callbacks. > > The smp_mb() was added (by Steven Rostedt) to fix a race condition > with swait wakeups vs. adding items to the list. For this part, you can also add my: Signed-off-by: Steven Rostedt <[email protected]> I'll also look at these and test them a bit against mainline. Thanks for doing this! -- Steve > > Signed-off-by: Thomas Gleixner <[email protected]> > Signed-off-by: Sebastian Andrzej Siewior <[email protected]> > Cc: Steven Rostedt <[email protected]> > [PG: carry forward from multiple v3.10-rt patches to mainline, align > function names with "normal" wait queue names, update commit log.] > Signed-off-by: Paul Gortmaker <[email protected]> > --- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
