linux-kernel - [PATCH 0/7] cpuidle: Handle TIF_NR_POLLING on behalf of polling idle states

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Message-ID: <20231124223226.24249-1-frederic@kernel.org>
Date:   Fri, 24 Nov 2023 23:32:19 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-pm@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 0/7] cpuidle: Handle TIF_NR_POLLING on behalf of polling idle states

The TIF_NR_POLLING handling against polling idle states (mwait and also
software polling) is a bit messy, with quite some wasted cycles spent
on useless atomic operations. This is a try to consolidate this state
handling from the cpuidle core.

Frederic Weisbecker (4):
  x86: Add a comment about the "magic" behind shadow sti before mwait
  cpuidle: Remove unnecessary current_clr_polling_and_test() from
    haltpoll
  cpuidle: s/CPUIDLE_FLAG_POLLING/CPUIDLE_FLAG_POLLING_SOFT
  cpuidle: Handle TIF_NR_POLLING on behalf of software polling idle
    states

Peter Zijlstra (3):
  x86: Fix CPUIDLE_FLAG_IRQ_ENABLE leaking timer reprogram
  cpuidle: Introduce CPUIDLE_FLAG_POLLING_HARD
  cpuidle: Handle TIF_NR_POLLING on behalf of CPUIDLE_FLAG_POLLING_HARD
    states

 Documentation/driver-api/pm/cpuidle.rst |  2 +-
 arch/x86/include/asm/mwait.h            | 23 +++++++++++---
 drivers/acpi/processor_idle.c           |  3 ++
 drivers/cpuidle/cpuidle-haltpoll.c      |  5 +---
 drivers/cpuidle/cpuidle-powernv.c       | 12 +-------
 drivers/cpuidle/cpuidle-pseries.c       | 15 ++--------
 drivers/cpuidle/cpuidle.c               | 22 +++++++++++++-
 drivers/cpuidle/governors/ladder.c      |  4 +--
 drivers/cpuidle/governors/menu.c        |  8 ++---
 drivers/cpuidle/governors/teo.c         |  8 ++---
 drivers/cpuidle/poll_state.c            | 32 ++++++++------------
 drivers/idle/intel_idle.c               | 24 +++++++--------
 include/linux/cpuidle.h                 |  3 +-
 include/linux/sched/idle.h              |  7 ++++-
 kernel/sched/idle.c                     | 40 +++++++++----------------
 15 files changed, 104 insertions(+), 104 deletions(-)

-- 
2.42.1