linux-kernel - [PATCH 0/2] timer: make deferrable cpu unbound timers really not bound to a cpu

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Message-Id: <1584326350-30275-1-git-send-email-psodagud@codeaurora.org>
Date:   Sun, 15 Mar 2020 19:39:08 -0700
From:   Prasad Sodagudi <psodagud@...eaurora.org>
To:     john.stultz@...aro.org, tglx@...utronix.de, sboyd@...nel.org
Cc:     linux-kernel@...r.kernel.org, saravanak@...gle.com,
        tsoni@...eaurora.org, tj@...nel.org,
        Prasad Sodagudi <psodagud@...eaurora.org>
Subject: [PATCH 0/2] timer: make deferrable cpu unbound timers really not bound to a cpu

These patches introduce support for global deferrable timers and this feature is very useful
for the mobile chipsets. There was a discussion on global deferrable timer discussion - [1]
and thomas raised cacheline bouncing problem. I am thinking that, that problem is addressed
on later patches problem as much as possible. Global deferrable timers runs on the
tick_do_timer_cpu to avoid cacheline bouncing problem during the execution of timers.  

[1]- https://lore.kernel.org/patchwork/patch/500541/

Joonwoo Park (1):
  timer: make deferrable cpu unbound timers really not bound to a cpu

Prasad Sodagudi (1):
  sched: Add a check for cpu unbound deferrable timers

 include/linux/timer.h    |  3 +++
 kernel/time/tick-sched.c |  6 +++++
 kernel/time/timer.c      | 63 ++++++++++++++++++++++++++++++++++++++++++++----
 3 files changed, 67 insertions(+), 5 deletions(-)

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