john stultz 17c38b7490 Cache xtime every call to update_wall_time ...

This avoids xtime lag seen with dynticks, because while 'xtime' itself
is still not updated often, we keep a 'xtime_cache' variable around that
contains the approximate real-time that _is_ updated each time we do a
'update_wall_time()', and is thus never off by more than one tick.

IOW, this restores the original semantics for 'xtime' users, as long as
you use the proper abstraction functions (ie 'current_kernel_time()' or
'get_seconds()' depending on whether you want a timespec or just the
seconds field).

[ Updated Patch.  As penance for my sins I've also yanked another #ifdef
  that was added to avoid the xtime lag w/ hrtimers.  ]

Signed-off-by: John Stultz <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2007-07-25 10:17:44 -07:00

..

clockevents.c

Remove clockevents_{release,request}_device

2007-07-16 09:05:43 -07:00

clocksource.c

clocksource: fix lock order in the resume path

2007-05-15 08:54:00 -07:00

jiffies.c

…

Kconfig

…

Makefile

…

ntp.c

NTP: move the cmos update code into ntp.c

2007-07-21 17:49:15 -07:00

tick-broadcast.c

clockevents: fix device replacement

2007-07-21 17:49:15 -07:00

tick-common.c

clockevents: fix resume logic

2007-07-21 17:49:15 -07:00

tick-internal.h

…

tick-oneshot.c

highres: improve debug output

2007-07-21 17:49:15 -07:00

tick-sched.c

tick management: spread timer interrupt

2007-07-21 17:49:15 -07:00

timekeeping.c

Cache xtime every call to update_wall_time

2007-07-25 10:17:44 -07:00

timer_list.c

kallsyms: make KSYM_NAME_LEN include space for trailing '\0'

2007-07-17 10:23:03 -07:00

timer_stats.c

kallsyms: make KSYM_NAME_LEN include space for trailing '\0'

2007-07-17 10:23:03 -07:00