Re: [PATCH 0/9] psi: pressure stall information for CPU, memory, and IO v4

Johannes Weiner
2018-10-23T17:29:37Z

On Thu, Oct 18, 2018 at 07:07:10PM -0700, Andrew Morton wrote:
> On Tue, 28 Aug 2018 13:22:49 -0400 Johannes Weiner <hannes@cmpxchg.org> wrote:
>
> > This version 4 of the PSI series incorporates feedback from Peter and
> > fixes two races in the lockless aggregator that Suren found in his
> > testing and which caused the sample calculation to sometimes underflow
> > and record bogusly large samples; details at the bottom of this email.
>
> We've had very little in the way of review activity for the PSI
> patchset. According to the changelog tags, anyway.

Peter reviewed it quite extensively over all revisions, and acked the
final version. Peter, can we add your acked-by or reviewed-by tag(s)?

The scheduler part accounts for 99% of the complexity in those
patches. The mm bits, while somewhat sprawling, are mostly mechanical.