Re: sched: softlockups in multi_cpu_stop

Davidlohr Bueso
2015-03-06T19:45:10Z

On Fri, 2015-03-06 at 11:32 -0800, Linus Torvalds wrote:
> Basically, to me, the whole "if a lock is so contended that we need to
> play locking games, then we should look at why we *use* the lock,
> rather than at the lock itself" is a religion.

Oh absolutely, I'm only mentioning the locking primitive side of
mmap_sem, for which minor optimizations will _never_ solve the actual
scalability issues. But yes, point taken.

Thanks,
Davidlohr