linux-kernel - [patch V3 00/22] timer: Refactor the timer wheel

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Date:	Fri, 24 Jun 2016 14:32:00 -0000
From:	Thomas Gleixner <tglx@...utronix.de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Chris Mason <clm@...com>,
	Arjan van de Ven <arjan@...radead.org>, rt@...utronix.de,
	Rik van Riel <riel@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	George Spelvin <linux@...encehorizons.net>,
	Len Brown <lenb@...nel.org>,
	Josh Triplett <josh@...htriplett.org>
Subject: [patch V3 00/22] timer: Refactor the timer wheel

This is the third version of the timer wheel rework series. The previous
versions can be found here:

V1:   http://lkml.kernel.org/r/20160613070440.950649741@linutronix.de
V2:   http://lkml.kernel.org/r/20160617121134.417319325@linutronix.de

The series is also available in git:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.timers

Changes vs. V2:

 - Removed the 1000Hz granularity reduction to 4ms. Eric explained that
   datacenter workloads require the granularity in the first level wheel.

 - Fixed the typo in tilepro. 

 - Converted sigtimedwait() to hrtimers

 - To avoid the cascading I extended the wheel by another level. This removes
   the rarely executed cascading code path, but increases the storage size for
   HZ>100 slightly. If the tiny folks care, there is an simple option to cut
   the storage size in half for the price of reduced granularity.

Thanks,

	tglx

----
 arch/x86/kernel/apic/x2apic_uv_x.c  |    4 
 arch/x86/kernel/cpu/mcheck/mce.c    |    4 
 block/genhd.c                       |    5 
 drivers/cpufreq/powernv-cpufreq.c   |    5 
 drivers/mmc/host/jz4740_mmc.c       |    2 
 drivers/net/ethernet/tile/tilepro.c |    4 
 drivers/power/bq27xxx_battery.c     |    5 
 drivers/tty/metag_da.c              |    4 
 drivers/tty/mips_ejtag_fdc.c        |    4 
 drivers/usb/host/ohci-hcd.c         |    1 
 drivers/usb/host/xhci.c             |    2 
 include/linux/list.h                |   10 
 include/linux/timer.h               |   34 -
 kernel/signal.c                     |   24 
 kernel/time/tick-internal.h         |    1 
 kernel/time/tick-sched.c            |   46 -
 kernel/time/timer.c                 | 1096 +++++++++++++++++++++---------------
 lib/random32.c                      |    1 
 net/ipv4/inet_connection_sock.c     |    7 
 net/ipv4/inet_timewait_sock.c       |    5 
 20 files changed, 734 insertions(+), 530 deletions(-)