Re: [PATCH 1/3] wait-simple: Introduce the simple waitqueueimplementation

[Steven Rostedt]

On Wed, 11 Dec 2013 20:06:37 -0500
Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx> wrote:

> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> 
> 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 <rostedt@xxxxxxxxxxx>

I'll also look at these and test them a bit against mainline.

Thanks for doing this!

-- Steve

> 
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> [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 <paul.gortmaker@xxxxxxxxxxxxx>
> ---

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/