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[patch 4 13/22] timer: Reduce the CPU index space to 256k

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  [patch 4 13/22] timer: Reduce the CPU index space to 256k Thomas Gleixner <tglx@linutronix.de> - 2016-07-04 12:00 +0200
    [tip:timers/core] timers: Reduce the CPU index space to 256k tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2016-07-07 10:50 +0200

#1436199 — [patch 4 13/22] timer: Reduce the CPU index space to 256k

We want to store the array index in the flags space. 256k CPUs should be
enough for a while.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
---
 include/linux/timer.h |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -58,12 +58,12 @@ struct timer_list {
  * workqueue locking issues. It's not meant for executing random crap
  * with interrupts disabled. Abuse is monitored!
  */
-#define TIMER_CPUMASK		0x0007FFFF
-#define TIMER_MIGRATING		0x00080000
+#define TIMER_CPUMASK		0x0003FFFF
+#define TIMER_MIGRATING		0x00040000
 #define TIMER_BASEMASK		(TIMER_CPUMASK | TIMER_MIGRATING)
-#define TIMER_DEFERRABLE	0x00100000
-#define TIMER_PINNED		0x00200000
-#define TIMER_IRQSAFE		0x00400000
+#define TIMER_DEFERRABLE	0x00080000
+#define TIMER_PINNED		0x00100000
+#define TIMER_IRQSAFE		0x00200000
 
 #define __TIMER_INITIALIZER(_function, _expires, _data, _flags) { \
 		.entry = { .next = TIMER_ENTRY_STATIC },	\

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#1438386 — [tip:timers/core] timers: Reduce the CPU index space to 256k

Commit-ID:  b0d6e2dcb284f1f4dcb4b92760f49eeaf5fc0bc7
Gitweb:     http://git.kernel.org/tip/b0d6e2dcb284f1f4dcb4b92760f49eeaf5fc0bc7
Author:     Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Mon, 4 Jul 2016 09:50:29 +0000
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 7 Jul 2016 10:35:08 +0200

timers: Reduce the CPU index space to 256k

We want to store the array index in the flags space. 256k CPUs should be
enough for a while.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Chris Mason <clm@fb.com>
Cc: George Spelvin <linux@sciencehorizons.net>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160704094342.030144293@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 include/linux/timer.h | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/linux/timer.h b/include/linux/timer.h
index a8f6c70..989f33d 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -58,12 +58,12 @@ struct timer_list {
  * workqueue locking issues. It's not meant for executing random crap
  * with interrupts disabled. Abuse is monitored!
  */
-#define TIMER_CPUMASK		0x0007FFFF
-#define TIMER_MIGRATING		0x00080000
+#define TIMER_CPUMASK		0x0003FFFF
+#define TIMER_MIGRATING		0x00040000
 #define TIMER_BASEMASK		(TIMER_CPUMASK | TIMER_MIGRATING)
-#define TIMER_DEFERRABLE	0x00100000
-#define TIMER_PINNED		0x00200000
-#define TIMER_IRQSAFE		0x00400000
+#define TIMER_DEFERRABLE	0x00080000
+#define TIMER_PINNED		0x00100000
+#define TIMER_IRQSAFE		0x00200000
 
 #define __TIMER_INITIALIZER(_function, _expires, _data, _flags) { \
 		.entry = { .next = TIMER_ENTRY_STATIC },	\

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