linux/arch/um/os-Linux
Jeff Dike d2753a6d19 uml: tickless support
Enable tickless support.

CONFIG_TICK_ONESHOT and CONFIG_NO_HZ are enabled.

itimer_clockevent gets CLOCK_EVT_FEAT_ONESHOT and an implementation of
.set_next_event.

CONFIG_UML_REAL_TIME_CLOCK goes away because it only makes sense when there is
a clock ticking away all the time.  timer_handler now just calls do_IRQ once
without trying to figure out how many ticks to emulate.

The idle loop now needs to turn ticking on and off.

Userspace ticks keep happening as usual.  However, the userspace loop keep
track of when the next wakeup should happen and suppresses process ticks until
that happens.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:43:08 -07:00
..
drivers uml: userspace files should call libc directly 2007-10-16 09:43:06 -07:00
include Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
skas uml: tickless support 2007-10-16 09:43:08 -07:00
sys-i386 uml: style fixes in FP code 2007-10-16 09:43:07 -07:00
sys-x86_64 uml: throw out CONFIG_MODE_TT 2007-10-16 09:43:05 -07:00
aio.c uml: userspace files should call libc directly 2007-10-16 09:43:06 -07:00
elf_aux.c [PATCH] uml: host VDSO fix 2007-03-01 14:53:38 -08:00
execvp.c [PATCH] uml: make execvp safe for our usage 2006-11-25 13:28:34 -08:00
file.c uml: userspace files should call libc directly 2007-10-16 09:43:06 -07:00
helper.c uml: userspace files should call libc directly 2007-10-16 09:43:06 -07:00
irq.c uml: separate timer initialization 2007-10-16 09:43:08 -07:00
main.c uml: style fixes pass 3 2007-10-16 09:43:05 -07:00
Makefile uml: style fixes pass 1 2007-10-16 09:43:05 -07:00
mem.c uml: userspace files should call libc directly 2007-10-16 09:43:06 -07:00
process.c uml: userspace files should call libc directly 2007-10-16 09:43:06 -07:00
registers.c uml: floating point signal delivery fixes 2007-10-16 09:43:07 -07:00
sigio.c uml: Eliminate kernel allocator wrappers 2007-07-16 09:05:38 -07:00
signal.c uml: separate timer initialization 2007-10-16 09:43:08 -07:00
start_up.c uml: userspace files should call libc directly 2007-10-16 09:43:06 -07:00
time.c uml: tickless support 2007-10-16 09:43:08 -07:00
tls.c uml: style fixes pass 1 2007-10-16 09:43:05 -07:00
trap.c uml: get rid of do_longjmp 2007-10-16 09:43:05 -07:00
tty_log.c uml: convert libc layer to call read and write 2007-05-07 12:13:03 -07:00
tty.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
uaccess.c uml: get rid of do_longjmp 2007-10-16 09:43:05 -07:00
umid.c uml: style fixes pass 3 2007-10-16 09:43:05 -07:00
user_syms.c uml: fix string exporting on UML/i386 2007-07-24 12:24:58 -07:00
util.c uml: remove task_protections 2007-05-11 08:29:33 -07:00