Martin Schwidefsky 3c5d92a0cf nohz: Introduce arch_needs_cpu ...

Allow the architecture to request a normal jiffy tick when the system
goes idle and tick_nohz_stop_sched_tick is called . On s390 the hook is
used to prevent the system going fully idle if there has been an
interrupt other than a clock comparator interrupt since the last wakeup.

On s390 the HiperSockets response time for 1 connection ping-pong goes
down from 42 to 34 microseconds. The CPU cost decreases by 27%.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
LKML-Reference: <20090929122533.402715150@de.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2009-11-05 07:53:53 +01:00

..

alpha

alpha: Fix duplicate <asm/thread_info.h> include

2009-09-27 14:46:05 -07:00

arm

Merge master.kernel.org:/home/rmk/linux-2.6-arm

2009-10-02 16:20:43 -07:00

avr32

Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next

2009-09-23 15:37:02 -07:00

blackfin

const: constify remaining file_operations

2009-10-01 16:11:11 -07:00

cris

const: constify remaining file_operations

2009-10-01 16:11:11 -07:00

frv

FRV: Flash mappings for the MB93090-MB00 motherboard

2009-09-24 17:18:38 -07:00

h8300

h8300: Cleanup linker script using new linker script macros.

2009-09-24 17:16:22 -07:00

ia64

const: mark struct vm_struct_operations

2009-09-27 11:39:25 -07:00

m32r

m32r: Fix IPI function calls for SMP

2009-10-04 12:02:37 +09:00

m68k

revert "m68k: convert to asm-generic/hardirq.h"

2009-10-01 16:11:11 -07:00

m68knommu

headers: utsname.h redux

2009-09-23 18:13:10 -07:00

microblaze

Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze

2009-09-24 09:01:44 -07:00

mips

MIPS: Avoid spurious make includecheck message

2009-09-30 21:47:02 +02:00

mn10300

mn10300: fix kernel build failures when using gcc-4.x

2009-10-01 16:11:12 -07:00

parisc

parisc: Remove useless altinstructions code copied from x86.

2009-09-24 17:16:21 -07:00

powerpc

const: constify remaining file_operations

2009-10-01 16:11:11 -07:00

s390

nohz: Introduce arch_needs_cpu

2009-11-05 07:53:53 +01:00

score

Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next

2009-09-23 15:37:02 -07:00

sh

sh: Add support DMA Engine to SH7780

2009-09-25 12:19:33 +09:00

sparc

sparc64: implement page mapping percpu first chunk allocator

2009-09-29 09:17:57 +09:00

um

um: Clean up linker script using standard macros.

2009-09-24 17:16:22 -07:00

x86

x86: fix csum_ipv6_magic asm memory clobber

2009-10-01 16:11:12 -07:00

xtensa

xtensa: Cleanup linker script using new linker script macros.

2009-09-24 17:16:21 -07:00

.gitignore

…

Kconfig

oprofile: fix oprofile regression: select RING_BUFFER_ALLOW_SWAP

2009-09-17 15:53:42 -04:00