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3c5d92a0cf
linux/drivers/s390/cio
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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
..
airq.c [S390] cio: airq - fix array boundary 2009-03-26 15:24:14 +01:00
blacklist.c [S390] cio: fix wrong buffer access in cio_ignore_write 2009-03-26 15:24:16 +01:00
blacklist.h
ccwgroup.c [S390] pm: ccwgroup bus power management callbacks 2009-06-16 10:31:08 +02:00
chp.c [S390] proper use of device register 2009-09-11 10:29:45 +02:00
chp.h [S390] cio: Repair chpid event handling. 2008-07-14 10:02:11 +02:00
chsc_sch.c [S390] pm: chsc subchannel driver power management callbacks 2009-06-16 10:31:10 +02:00
chsc_sch.h [S390] cio: Add chsc subchannel driver. 2008-07-14 10:02:12 +02:00
chsc.c [S390] pm: css bus power management callbacks 2009-06-16 10:31:09 +02:00
chsc.h [S390] cio: move scsw helper functions to header file 2009-09-11 10:29:36 +02:00
cio_debug.h
cio.c nohz: Introduce arch_needs_cpu 2009-11-05 07:53:53 +01:00
cio.h [S390] cio: remove ccw_device init_name 2009-09-11 10:29:41 +02:00
cmf.c [S390] pm: ccw bus power management callbacks 2009-06-16 10:31:08 +02:00
crw.c [S390] cio/crw: add/fix locking 2009-03-26 15:24:13 +01:00
css.c [S390] cio: introduce consistent subchannel scanning 2009-09-22 22:58:42 +02:00
css.h [S390] cio: idset use actual number of ssids 2009-09-22 22:58:42 +02:00
device_fsm.c [S390] cio: failing set online/offline processing. 2009-09-11 10:29:38 +02:00
device_id.c
device_ops.c [S390] pm: ccw bus power management callbacks 2009-06-16 10:31:08 +02:00
device_pgid.c [S390] cio: introduce cio_update_schib 2008-12-25 13:39:10 +01:00
device_status.c [S390] cio: introduce cio_update_schib 2008-12-25 13:39:10 +01:00
device.c [S390] cio: introduce css_settle 2009-09-22 22:58:41 +02:00
device.h [S390] cio: merge init calls 2009-09-22 22:58:41 +02:00
fcx.c
idset.c [S390] cio: introduce consistent subchannel scanning 2009-09-22 22:58:42 +02:00
idset.h [S390] cio: introduce consistent subchannel scanning 2009-09-22 22:58:42 +02:00
io_sch.h [S390] pm: ccw bus power management callbacks 2009-06-16 10:31:08 +02:00
ioasm.h [S390] cio: inline assembly cleanup 2008-10-10 21:33:53 +02:00
isc.c [S390] cio: introduce isc_(un)register functions. 2008-07-14 10:02:11 +02:00
itcw.c [S390] cio: provide helper functions for fcx enabled I/O 2008-07-14 10:02:08 +02:00
Makefile [S390] cio: move scsw helper functions to header file 2009-09-11 10:29:36 +02:00
qdio_debug.c const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
qdio_debug.h [S390] qdio: rework debug feature logging 2008-12-25 13:38:59 +01:00
qdio_main.c [S390] qdio: change state of all primed input buffers 2009-09-22 22:58:43 +02:00
qdio_perf.c const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
qdio_perf.h [S390] qdio: inline qdio_perf_stat_inc 2009-06-12 10:27:32 +02:00
qdio_setup.c [S390] qdio: report SIGA errors directly 2009-03-26 15:24:22 +01:00
qdio_thinint.c [S390] qdio: merge AI tasklet into interrupt handler 2009-06-22 12:08:20 +02:00
qdio.h [S390] qdio: remove limited number of debugfs entries 2009-09-11 10:29:39 +02:00