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linux/arch/s390/kernel
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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
..
vdso32 Use macros for .data.page_aligned section. 2009-09-21 06:27:08 +02:00
vdso64 Use macros for .data.page_aligned section. 2009-09-21 06:27:08 +02:00
Makefile [S390] hibernation: merge files and move to kernel/ 2009-09-11 10:29:45 +02:00
asm-offsets.c [S390] hibernate: Do real CPU swap at resume time 2009-09-22 22:58:46 +02:00
audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
audit.h [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
base.S
…
bitmap.c [S390] move EXPORT_SYMBOLs to definitions 2009-03-26 15:24:11 +01:00
compat_audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
compat_exec_domain.c
…
compat_linux.c headers: utsname.h redux 2009-09-23 18:13:10 -07:00
compat_linux.h [S390] Convert sys_execve to function with parameters. 2009-09-22 22:58:43 +02:00
compat_ptrace.h [S390] Expose a constant for the number of words representing the CRs 2009-03-26 15:24:25 +01:00
compat_signal.c [S390] fix system call parameter functions. 2008-11-27 11:06:56 +01:00
compat_wrapper.S [S390] Get rid of init_module/delete_module compat functions. 2009-09-22 22:58:43 +02:00
cpcmd.c [S390] convert cpcmd printks to pr_xxx macros. 2008-12-25 13:39:19 +01:00
crash.c
…
debug.c sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
diag.c [S390] vmur: fix diag14 exceptions with addresses > 2GB. 2007-08-22 13:51:47 +02:00
dis.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
early.c [S390] kernel: Print an error message if kernel NSS cannot be defined 2009-09-11 10:29:51 +02:00
ebcdic.c
…
entry.S Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-09-11 13:24:03 -07:00
entry.h [S390] Convert sys_execve to function with parameters. 2009-09-22 22:58:43 +02:00
entry64.S Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-09-11 13:24:03 -07:00
ftrace.c tracing: Add syscall tracepoints - s390 arch update 2009-08-26 21:29:44 +02:00
head.S [S390] Limit cpu detection to 256 physical cpus. 2009-09-11 10:29:55 +02:00
head31.S [S390] Initialize __LC_THREAD_INFO early. 2009-09-11 10:29:53 +02:00
head64.S [S390] Limit cpu detection to 256 physical cpus. 2009-09-11 10:29:55 +02:00
init_task.c Use new __init_task_data macro in arch init_task.c files. 2009-09-21 06:27:08 +02:00
ipl.c [S390] kernel: Convert upper case scpdata to lower case 2009-09-11 10:29:46 +02:00
irq.c [S390] Fix init irq proc build break. 2009-02-11 10:37:39 +01:00
kprobes.c [S390] kprobes: defer setting of ctlblk state 2009-06-22 12:08:24 +02:00
machine_kexec.c [S390] Cleanup kprobes printk messages. 2008-07-14 10:02:24 +02:00
mcount.S [S390] improve mcount code 2009-09-11 10:29:43 +02:00
mcount64.S [S390] improve mcount code 2009-09-11 10:29:43 +02:00
mem_detect.c [S390] s390: hibernation support for s390 2009-06-16 10:31:22 +02:00
module.c module: cleanup FIXME comments about trimming exception table entries. 2009-06-12 21:47:05 +09:30
nmi.c [S390] merge cpu.h into cputime.h 2009-06-12 10:27:29 +02:00
process.c headers: utsname.h redux 2009-09-23 18:13:10 -07:00
processor.c [S390] Add hwcap flag for the etf3 enhancement facility 2009-03-26 15:24:32 +01:00
ptrace.c [S390] ptrace: use common code for simple peek/poke operations 2009-09-22 22:58:45 +02:00
reipl.S [S390] reipl: move dump_prefix_page out of text section. 2007-03-05 23:35:43 +01:00
reipl64.S [S390] fix clock comparator save area usage 2009-03-26 15:24:32 +01:00
relocate_kernel.S
…
relocate_kernel64.S
…
s390_ext.c nohz: Introduce arch_needs_cpu 2009-11-05 07:53:53 +01:00
s390_ksyms.c [S390] move EXPORT_SYMBOLs to definitions 2009-03-26 15:24:11 +01:00
sclp.S [S390] hibernate: Do real CPU swap at resume time 2009-09-22 22:58:46 +02:00
setup.c [S390] kvm: use console_initcall() to initialize s390 virtio console 2009-09-11 10:29:52 +02:00
signal.c KEYS: Add a keyctl to install a process's session keyring on its parent [try #6] 2009-09-02 21:29:22 +10:00
smp.c cpumask: arch_send_call_function_ipi_mask: s390 2009-09-24 09:34:46 +09:30
stacktrace.c [S390] Fix stacktrace compile bug. 2008-07-17 17:22:09 +02:00
suspend.c [S390] hibernate: make sure pfn_is_nosave handles lowcore pages 2009-09-22 22:58:45 +02:00
swsusp_asm64.S [S390] hibernate: Do real CPU swap at resume time 2009-09-22 22:58:46 +02:00
sys_s390.c includecheck fix: s390, sys_s390.c 2009-09-20 15:02:14 +05:30
syscalls.S [S390] Get rid of init_module/delete_module compat functions. 2009-09-22 22:58:43 +02:00
sysinfo.c [S390] move sysinfo.c from drivers/s390 to arch/s390/kernel 2009-03-26 15:24:06 +01:00
time.c Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-09-18 09:15:24 -07:00
topology.c [S390] cpumask: remove cpu_coregroup_map 2009-03-26 15:24:32 +01:00
traps.c [S390] fix dump_stack vs. %p and (null) 2009-03-26 15:24:02 +01:00
vdso.c Use macros for .data.page_aligned section. 2009-09-21 06:27:08 +02:00
vmlinux.lds.S Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2009-09-15 09:39:44 -07:00
vtime.c nohz: Introduce arch_needs_cpu 2009-11-05 07:53:53 +01:00