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* [PATCH 0/5] tick/broadcast: Allow per-cpu timers to be used instead of broadcast
@ 2021-05-20 18:47 Will Deacon
  2021-05-20 18:47 ` [PATCH 1/5] tick/broadcast: Drop unneeded CONFIG_GENERIC_CLOCKEVENTS_BROADCAST guard Will Deacon
                   ` (4 more replies)
  0 siblings, 5 replies; 11+ messages in thread
From: Will Deacon @ 2021-05-20 18:47 UTC (permalink / raw)
  To: linux-arm-kernel
  Cc: linux-kernel, Will Deacon, Frederic Weisbecker, Thomas Gleixner,
	Marc Zyngier, Lorenzo Colitti, John Stultz, Stephen Boyd,
	kernel-team

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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^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2021-05-21 14:45 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-20 18:47 [PATCH 0/5] tick/broadcast: Allow per-cpu timers to be used instead of broadcast Will Deacon
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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