linux-kernel - [tip:timers/core] timers: Reduce the CPU index space to 256k

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 7 Jul 2016 01:45:23 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux@...encehorizons.net, paulmck@...ux.vnet.ibm.com,
	josh@...htriplett.org, arjan@...radead.org, mingo@...nel.org,
	fweisbec@...il.com, peterz@...radead.org, hpa@...or.com,
	lenb@...nel.org, tglx@...utronix.de, torvalds@...ux-foundation.org,
	riel@...hat.com, linux-kernel@...r.kernel.org, clm@...com
Subject: [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@...utronix.de>
AuthorDate: Mon, 4 Jul 2016 09:50:29 +0000
Committer:  Ingo Molnar <mingo@...nel.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@...utronix.de>
Reviewed-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Arjan van de Ven <arjan@...radead.org>
Cc: Chris Mason <clm@...com>
Cc: George Spelvin <linux@...encehorizons.net>
Cc: Josh Triplett <josh@...htriplett.org>
Cc: Len Brown <lenb@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...hat.com>
Cc: rt@...utronix.de
Link: http://lkml.kernel.org/r/20160704094342.030144293@linutronix.de
Signed-off-by: Ingo Molnar <mingo@...nel.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 },	\