Re: [PATCH] locking/mutex: Avoid spinner vs waiter starvation

From: Davidlohr Bueso
Date: Wed Feb 03 2016 - 14:25:14 EST


On Wed, 03 Feb 2016, Ding Tianhong wrote:

Agree, but this patch is going to help the waiter in the wait list to get the lock, your scene probability looks more
too low and I don't think it is a problem.

Sure, I was in fact implying its not the end of the world,
although it will be interesting to see the impact on different
(non pathological) workloads, even if it only affects a single
waiter. Also, technically this issue can also affect rwsems if
only using writers, but that's obviously pretty idiotic, so I
wouldn't worry about it.

Thanks,
Davidlohr