linux.git/arch/ia64/kernel/time.c, branch v2.6.26

[IA64] export account_system_vtime

2008-06-30T22:06:48+00:00

The symbol account_system_vtime is used by the kvm module but
not exported.  This breaks building with CONFIG_VIRT_CPU_ACCOUNTING
and CONFIG_KVM=m.

Signed-off-by: Doug Chapman 
Acked-by: Hidetosho Seto 
Signed-off-by: Tony Luck

[IA64] fix section mismatch in arch/ia64/kernel/irq.c

2008-04-30T21:08:01+00:00

This patch shuts up the following:

	WARNING: vmlinux.o(.text+0x7102): Section mismatch in
	reference from the function fixup_irqs() to the function
	.devinit.text:ia64_disable_timer()

Removing ia64_disable_timer() is safe because there are no functions
calling it other than the fixup_irqs(),

Signed-off-by: Hidetoshi Seto 
Signed-off-by: Tony Luck

[IA64] VIRT_CPU_ACCOUNTING (accurate cpu time accounting)

2008-02-20T20:55:37+00:00

This patch implements VIRT_CPU_ACCOUNTING for ia64,
which enable us to use more accurate cpu time accounting.

The VIRT_CPU_ACCOUNTING is an item of kernel config, which s390
and powerpc arch have.  By turning this config on, these archs
change the mechanism of cpu time accounting from tick-sampling
based one to state-transition based one.

The state-transition based accounting is done by checking time
(cycle counter in processor) at every state-transition point,
such as entrance/exit of kernel, interrupt, softirq etc.
The difference between point to point is the actual time consumed
during in the state. There is no doubt about that this value is
more accurate than that of tick-sampling based accounting.

Signed-off-by: Hidetoshi Seto 
Signed-off-by: Tony Luck

time: fix typo in comments

2008-02-08T17:22:29+00:00

Fix typo in comments.

BTW: I have to fix coding style in arch/ia64/kernel/time.c also, otherwise
checkpatch.pl will be complaining.

Signed-off-by: Li Zefan 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: john stultz 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sched: remove printk_clock()

2008-01-25T20:07:59+00:00

printk_clock() is obsolete - it has been replaced with cpu_clock().

Signed-off-by: Ingo Molnar

Fix discrepancy between VDSO based gettimeofday() and sys_gettimeofday().

2007-10-18T21:37:20+00:00

On platforms that copy sys_tz into the vdso (currently only x86_64, soon to
include powerpc), it is possible for the vdso to get out of sync if a user
calls (admittedly unusual) settimeofday(NULL, ptr).

This patch adds a hook for architectures that set
CONFIG_GENERIC_TIME_VSYSCALL to ensure when sys_tz is updated they can also
updatee their copy in the vdso.

Signed-off-by: Tony Breeds 
Cc: Andi Kleen 
Cc: Tony Luck 
Acked-by: John Stultz 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Thomas Gleixner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[IA64] ITC: Reduce rating for ITC clock if ITCs are drifty

2007-08-01T21:02:36+00:00

Make sure to reduce the rating of the ITC clock if ITCs are drifty. If they
are drifting then we have not synchronized the ITC values, nor are we doing
the jitter compensation (useless since drift may increase the differentials
arbitrarily).

Without this patch it is possible that the ITC clock becomes selected as
the system clock on systems with drifty ITCs which will result in
nanosleep hanging.

One can still select the itc clock manually on such systems via

clocksource=itc

(Produces nice hangs on SGI Altix.)

Signed-off-by: Christoph Lameter 
Signed-off-by: Tony Luck

use CLOCKSOURCE_MASK() instead of too large constant

2007-07-26T18:11:57+00:00

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

ia64 time.c: ANSIfy

2007-07-26T18:11:57+00:00

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

[IA64] Convert to generic timekeeping/clocksource

2007-07-20T18:22:30+00:00

This is a merge of Peter Keilty's initial patch (which was
revived by Bob Picco) for this with Hidetoshi Seto's fixes
and scaling improvements.

Acked-by: Bob Picco 
Signed-off-by: Tony Luck