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Message-Id: <20230821221956.698117-1-qyousef@layalina.io>
Date: Mon, 21 Aug 2023 23:19:50 +0100
From: Qais Yousef <qyousef@...alina.io>
To: stable@...r.kernel.org
Cc: Juri Lelli <juri.lelli@...hat.com>,
Waiman Long <longman@...hat.com>, Tejun Heo <tj@...nel.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Peter Zijlstra <peterz@...radead.org>,
Vincent Guittot <vincent.guittot@...aro.org>,
Ingo Molnar <mingo@...nel.org>, Hao Luo <haoluo@...gle.com>,
John Stultz <jstultz@...gle.com>, cgroups@...r.kernel.org,
linux-kernel@...r.kernel.org, Qais Yousef <qyousef@...alina.io>
Subject: [PATCH 0/6] Backport rework of deadline bandwidth restoration for 6.4.y
This is a backport of the series that fixes the way deadline bandwidth
restoration is done which is causing noticeable delay on resume path. It also
converts the cpuset lock back into a mutex which some users on Android too.
I lack the details but AFAIU the read/write semaphore was slower on high
contention.
Compile tested against some randconfig for different archs. Only boot tested on
x86 qemu.
Based on v6.4.11
Original series:
https://lore.kernel.org/lkml/20230508075854.17215-1-juri.lelli@redhat.com/
Thanks!
--
Qais Yousef
Dietmar Eggemann (2):
sched/deadline: Create DL BW alloc, free & check overflow interface
cgroup/cpuset: Free DL BW in case can_attach() fails
Juri Lelli (4):
cgroup/cpuset: Rename functions dealing with DEADLINE accounting
sched/cpuset: Bring back cpuset_mutex
sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets
cgroup/cpuset: Iterate only if DEADLINE tasks are present
include/linux/cpuset.h | 12 +-
include/linux/sched.h | 4 +-
kernel/cgroup/cgroup.c | 4 +
kernel/cgroup/cpuset.c | 244 ++++++++++++++++++++++++++--------------
kernel/sched/core.c | 41 +++----
kernel/sched/deadline.c | 67 ++++++++---
kernel/sched/sched.h | 2 +-
7 files changed, 246 insertions(+), 128 deletions(-)
--
2.34.1
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