From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, "Will Deacon" <will@kernel.org>,
"Frederic Weisbecker" <fweisbec@gmail.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Marc Zyngier" <maz@kernel.org>,
"Lorenzo Colitti" <lorenzo@google.com>,
"John Stultz" <john.stultz@linaro.org>,
"Stephen Boyd" <sboyd@kernel.org>,
"Mika Penttilä" <mika.penttila@nextfour.com>,
kernel-team@android.com
Subject: [PATCH v2 0/5] tick/broadcast: Allow per-cpu timers to be used instead of broadcast
Date: Mon, 24 May 2021 23:18:13 +0100 [thread overview]
Message-ID: <20210524221818.15850-1-will@kernel.org> (raw)
Hi all,
This is version two of the series I posted last week:
https://lore.kernel.org/r/20210520184705.10845-1-will@kernel.org
This patch series adds support for hardware where the per-cpu tick timer
cannot wake up from deep idle states (i.e. CLOCK_EVT_FEAT_C3STOP is set)
yet there is a secondary per-cpu timer which is generally less preferable
(i.e. slow to access) yet capable of delivering the wakeup.
Changes since v1 include:
* Fixed module refcounting and use of clockevents_exchange_device()
* Require CLOCK_EVT_FEAT_PERCPU for new wakeup per-cpu source
* Fix transition to oneshot mode while idle
* Tested on my x86 laptop
Cheers,
Will
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Mika Penttilä <mika.penttila@nextfour.com>
Cc: kernel-team@android.com
--->8
Will Deacon (5):
tick/broadcast: Drop unneeded CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
guard
tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper
tick/broadcast: Prefer per-cpu oneshot wakeup timers to broadcast
tick/broadcast: Program wakeup timer when entering idle if required
timer_list: Print name of per-cpu wakeup device
kernel/time/tick-broadcast.c | 143 +++++++++++++++++++++++++++++++----
kernel/time/tick-common.c | 2 +-
kernel/time/tick-internal.h | 5 +-
kernel/time/timer_list.c | 10 ++-
4 files changed, 140 insertions(+), 20 deletions(-)
--
2.31.1.818.g46aad6cb9e-goog
next reply other threads:[~2021-05-24 22:18 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-24 22:18 Will Deacon [this message]
2021-05-24 22:18 ` [PATCH v2 1/5] tick/broadcast: Drop unneeded CONFIG_GENERIC_CLOCKEVENTS_BROADCAST guard Will Deacon
2021-05-31 15:07 ` [tip: timers/core] " tip-bot2 for Will Deacon
2021-05-24 22:18 ` [PATCH v2 2/5] tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper Will Deacon
2021-05-27 7:23 ` Xin Hao
2021-05-27 8:22 ` Will Deacon
2021-05-27 11:35 ` Xin Hao
2021-05-27 11:55 ` Will Deacon
2021-05-27 11:56 ` Will Deacon
2021-05-31 14:29 ` Thomas Gleixner
2021-06-01 12:13 ` Will Deacon
2021-06-01 18:14 ` Thomas Gleixner
2021-05-31 15:06 ` [tip: timers/core] " tip-bot2 for Will Deacon
2021-05-24 22:18 ` [PATCH v2 3/5] tick/broadcast: Prefer per-cpu oneshot wakeup timers to broadcast Will Deacon
2021-05-31 15:06 ` [tip: timers/core] " tip-bot2 for Will Deacon
2021-05-24 22:18 ` [PATCH v2 4/5] tick/broadcast: Program wakeup timer when entering idle if required Will Deacon
2021-05-31 15:06 ` [tip: timers/core] " tip-bot2 for Will Deacon
2021-05-24 22:18 ` [PATCH v2 5/5] timer_list: Print name of per-cpu wakeup device Will Deacon
2021-05-31 15:06 ` [tip: timers/core] " tip-bot2 for Will Deacon
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