Re: [PATCH v2] arm64: tlbflush: Don't broadcast if mm was only active on local cpu

[Linu Cherian <linu.cherian@arm.com>]

Hi,

On Mon, Jun 15, 2026 at 03:43:41PM +0100, Will Deacon wrote:
> On Mon, Jun 15, 2026 at 12:21:19PM +0100, Ryan Roberts wrote:
> > On 14/06/2026 12:04, Will Deacon wrote:
> > > On Sat, May 23, 2026 at 07:17:10PM +0530, Linu Cherian wrote:
> > >> From: Ryan Roberts <ryan.roberts@arm.com>
> > >>
> > >> Testing with 7.1-rc4 :
> > >> +-----------------------+---------------------------------------------------+-------------+
> > >> | Benchmark             | Result Class                                      |  Improvement|  
> > >> +=======================+===================================================+=============+
> > >> | perf/syscall          | fork (ops/sec)                                    |   (I) 3.25% |
> > >> +-----------------------+---------------------------------------------------+-------------+
> > >> | pts/memtier-benchmark | Protocol: Redis Clients: 100 Ratio: 1:5 (Ops/sec) |   (I) 2.70% |
> > >> | 			| Protocol: Redis Clients: 100 Ratio: 5:1 (Ops/sec) |   (I) 2.13% |
> > >> +-----------------------+---------------------------------------------------+-------------+
> > > 
> > > I think we need a much more comprehensive set of benchmarks before we can
> > > begin to consider a change like this.
> > 
> > I believe that Linu ran a wider set of benchmarks and didn't find any
> > regressions. These are just the ones that show improvement (Linu, please correct
> > me and/or provide details).
> 
> I think it's important to show the ones that suffer as well... and also
> look at different configurations (e.g. preemptible settings) and different
> environments (e.g. native vs in a VM).

All our tests were ran on the host. 
Yeah, agree that other suggested configurations/environments need to be anlayzed as well.

--
Thanks,
Linu Cherian.