Re: [PATCH 0/3] FUTEX : new PRIVATE futexes, SMP and NUMA improvements

Nick Piggin
2007-03-15T20:15:26Z

Eric Dumazet wrote:
> Hi
>
> I'm pleased to present these patches which improve linux futex performance and
> scalability, on both UP, SMP and NUMA configs.
>
> I had this idea last year but I was not understood, probably because I gave
> not enough explanations. Sorry if this mail is really long...

Yes please, this is really nice. The mmap_sem is already overworked just
doing real mm stuff, let alone making it the central point of our "scalable"
thread synchronisation syscall.

To summarise: not only will this make futexes scale much better, but it will
also take some load off mmap_sem.

--
SUSE Labs, Novell Inc.
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