Re: Lower than expected CPU pressure in PSI

Johannes Weiner
2020-01-09T16:23:34Z

On Wed, Jan 08, 2020 at 11:47:10AM -0800, Ivan Babrou wrote:
> P.S.: ./scripts/get_maintainer.pl kernel/sched/psi.c does not say
> Johannes Weiner is a maintainer

Mostly because psi is so intertwined with the scheduler that it's been
maintained through the scheduler tree. But let's add an entry for it,
the sched/ directory matching will ensure it shows all pertinent CCs:

$ ./scripts/get_maintainer.pl kernel/sched/psi.c
Johannes Weiner <hannes@cmpxchg.org> (maintainer:PRESSURE STALL INFORMATION (PSI))
Ingo Molnar <mingo@redhat.com> (maintainer:SCHEDULER)
Peter Zijlstra <peterz@infradead.org> (maintainer:SCHEDULER)
Juri Lelli <juri.lelli@redhat.com> (maintainer:SCHEDULER)
Vincent Guittot <vincent.guittot@linaro.org> (maintainer:SCHEDULER)
Dietmar Eggemann <dietmar.eggemann@arm.com> (reviewer:SCHEDULER)
Steven Rostedt <rostedt@goodmis.org> (reviewer:SCHEDULER)
Ben Segall <bsegall@google.com> (reviewer:SCHEDULER)
Mel Gorman <mgorman@suse.de> (reviewer:SCHEDULER)
linux-kernel@vger.kernel.org (open list:SCHEDULER)

---
From b865e10129c97c81fb83c368456d2c24e54badab Mon Sep 17 00:00:00 2001
From: Johannes Weiner <hannes@cmpxchg.org>
Date: Thu, 9 Jan 2020 10:36:58 -0500
Subject: [PATCH] MAINTAINERS: add maintenance information for psi

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
---
MAINTAINERS | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index bd5847e802de..228baf0e40a6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13367,6 +13367,12 @@ F: net/psample
F: include/net/psample.h
F: include/uapi/linux/psample.h

+PRESSURE STALL INFORMATION (PSI)
+M: Johannes Weiner <hannes@cmpxchg.org>
+S: Maintained
+F: kernel/sched/psi.c
+F: include/linux/psi*
+
PSTORE FILESYSTEM
M: Kees Cook <keescook@chromium.org>
M: Anton Vorontsov <anton@enomsg.org>
--
2.24.1