On Mon, Nov 18, 2024 at 07:28:05AM +0100, Martin Pieuchot wrote:
> On 14/11/24(Thu) 13:50, Martin Pieuchot wrote:
> > [...] 
> > I haven't try WITNESS kernel, I'd be glad if someone could report on
> > that.
> 
> I did more tests including with WITNESS during the WE.  I observed that
> on my 24 CPUs machine the contention that was previously on SCHED_LOCK()
> shifted to the KERNEL_LOCK() and global UVM mutexes which explains why I
> doesn't notice as many improvements as with 80 CPUs.
> 
> ok mpi@

Ok from me as well. Been running with this since it was posted on
build machine and laptops. No problems seen.