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>,
kernel-team@android.com
Subject: [PATCH 0/5] tick/broadcast: Allow per-cpu timers to be used instead of broadcast
Date: Thu, 20 May 2021 19:47:00 +0100 [thread overview]
Message-ID: <20210520184705.10845-1-will@kernel.org> (raw)
Hi all,
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.
The meat and potatoes are in patches 3 and 4, but since I've not hacked
on this part of the kernel before I would appreciate feedback on any of
the changes I'm proposing.
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: 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 | 135 ++++++++++++++++++++++++++++++-----
kernel/time/tick-common.c | 2 +-
kernel/time/tick-internal.h | 5 +-
kernel/time/timer_list.c | 11 ++-
4 files changed, 133 insertions(+), 20 deletions(-)
--
2.31.1.818.g46aad6cb9e-goog
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next reply other threads:[~2021-05-20 18:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-20 18:47 Will Deacon [this message]
2021-05-20 18:47 ` [PATCH 1/5] tick/broadcast: Drop unneeded CONFIG_GENERIC_CLOCKEVENTS_BROADCAST guard Will Deacon
2021-05-20 18:47 ` [PATCH 2/5] tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper Will Deacon
2021-05-20 18:47 ` [PATCH 3/5] tick/broadcast: Prefer per-cpu oneshot wakeup timers to broadcast Will Deacon
2021-05-21 2:25 ` Mika Penttilä
2021-05-21 11:25 ` Will Deacon
2021-05-21 12:18 ` Will Deacon
2021-05-21 13:49 ` Thomas Gleixner
2021-05-21 14:43 ` Will Deacon
2021-05-20 18:47 ` [PATCH 4/5] tick/broadcast: Program wakeup timer when entering idle if required Will Deacon
2021-05-20 18:47 ` [PATCH 5/5] timer_list: Print name of per-cpu wakeup device Will Deacon
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