On Mon, 2005-12-12 at 16:57 -0800, Daniel Walker wrote:
> On Mon, 2005-12-12 at 23:45 +0000, David Howells wrote:
>
> > (1) Provides a simple xchg() based semaphore as a default for all
> > architectures that don't wish to override it and provide their own.
> >
> > Overriding is possible by setting CONFIG_ARCH_IMPLEMENTS_MUTEX and
> > supplying asm/mutex.h
> >
> > Partial overriding is possible by #defining mutex_grab(), mutex_release()
> > and is_mutex_locked() to perform the appropriate optimised functions.
>
> Your code is really similar to the RT mutex, which does everything that
> your mutex does at least ? Assuming you've reviewed the RT mutex, why
> would we want to use yours over it?
Maybe this would be the better !PREEMPT_RT version. But the true mutex
that Ingo is making would be used for the PREEMPT_RT side.
This code at least brings down the over head of semaphores where they
are not really needed. Looking at the code slightly (I must admit, I
spent maybe 30 seconds looking at it), it does seem a little similar to
Ingo's. Could just be coincidence, since the methods are pretty much
what multiple people would come up with. But you both work for RedHat,
hmm.
-- Steve
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
