Re: [RFC][PATCH 0/3] locking/mutex: Rewrite basic mutex

From: Ingo Molnar
Date: Sat Aug 27 2016 - 14:28:18 EST



* Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> Its because the mutex wasn't quite exclusive enough :-) If you let in multiple
> owner, like with that race you found, you get big gains in throughput ...

Btw., do we know which mutex that was?

That it didn't crash with a full AIM run suggests that whatever it is protecting
it could probably be parallelized some more while still having a mostly working
kernel! ;-)

Thanks,

Ingo