Re: [RFC patch 0/5] futex: Allow lockless empty check of hashbucketplist in futex_wake()

[Darren Hart]

On Sun, 2013-12-01 at 13:46 -0800, Linus Torvalds wrote:
> On Sun, Dec 1, 2013 at 12:39 PM, Eric Dumazet <eric.dumazet@xxxxxxxxx> wrote:
> >
> > Last time I checked, private futexes were used when appropriate.
> >
> > "strace -e futex" mainly show _PRIVATE uses.
> 
> Yeah, pthread mutexes seem to do it.

Yes, the default was changed to _PRIVATE for pthreads in glibc several
years back (2007 iirc). The performance benefits were significant.

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel


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