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Martin Schwidefsky 79741dd357 [PATCH] idle cputime accounting ... The cpu time spent by the idle process actually doing something is currently accounted as idle time. This is plain wrong, the architectures that support VIRT_CPU_ACCOUNTING=y can do better: distinguish between the time spent doing nothing and the time spent by idle doing work. The first is accounted with account_idle_time and the second with account_system_time. The architectures that use the account_xxx_time interface directly and not the account_xxx_ticks interface now need to do the check for the idle process in their arch code. In particular to improve the system vs true idle time accounting the arch code needs to measure the true idle time instead of just testing for the idle process. To improve the tick based accounting as well we would need an architecture primitive that can tell us if the pt_regs of the interrupted context points to the magic instruction that halts the cpu. In addition idle time is no more added to the stime of the idle process. This field now contains the system time of the idle process as it should be. On systems without VIRT_CPU_ACCOUNTING this will always be zero as every tick that occurs while idle is running will be accounted as idle time. This patch contains the necessary common code changes to be able to distinguish idle system time and true idle time. The architectures with support for VIRT_CPU_ACCOUNTING need some changes to exploit this. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		16 years ago
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vdso32	[S390] introduce vdso on s390	16 years ago
vdso64	[S390] introduce vdso on s390	16 years ago
Makefile	[S390] convert cpu related printks to pr_xxx macros.	16 years ago
asm-offsets.c	[S390] introduce vdso on s390	16 years ago
audit.c	…
audit.h	…
base.S	…
bitmap.S	…
compat_audit.c	…
compat_exec_domain.c	…
compat_linux.c	CRED: Separate task security context from task_struct	16 years ago
compat_linux.h	compat: generic compat get/settimeofday	17 years ago
compat_ptrace.h	[S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode	17 years ago
compat_signal.c	[S390] fix system call parameter functions.	16 years ago
compat_wrapper.S	compat: generic compat get/settimeofday	17 years ago
cpcmd.c	[S390] convert cpcmd printks to pr_xxx macros.	16 years ago
crash.c	…
debug.c	[S390] convert s390 debug feature printks to pr_xxx macros.	16 years ago
diag.c	…
dis.c	[S390] disassembler: fix idte instruction format.	17 years ago
early.c	[S390] Remove P390 support.	17 years ago
ebcdic.c	…
entry.S	[S390] Remove config options.	16 years ago
entry.h	[S390] Fix a lot of sparse warnings.	17 years ago
entry64.S	[S390] Remove config options.	16 years ago
head.S	[S390] Add processor type march=z10 and a processor type safety check.	16 years ago
head31.S	[S390] Remove initial kernel stack backchain initialization.	16 years ago
head64.S	[S390] Remove initial kernel stack backchain initialization.	16 years ago
init_task.c	[S390] Fix alignment of initial kernel stack.	16 years ago
ipl.c	[S390] ipl: Reboot from alternate device does not work when booting from file	17 years ago
irq.c	[S390] show_interrupts: prevent cpu hotplug when walking cpu_online_map.	17 years ago
kprobes.c	stop_machine: Wean existing callers off stop_machine_run()	17 years ago
machine_kexec.c	[S390] Cleanup kprobes printk messages.	17 years ago
mcount.S	[S390] ftrace: function tracer backend for s390	16 years ago
mem_detect.c	[S390] Remove diag 0x260 call from memory detection.	17 years ago
module.c	…
process.c	[S390] ftrace: disable tracing on idle psw	16 years ago
processor.c	[S390] convert cpu related printks to pr_xxx macros.	16 years ago
ptrace.c	[S390] remove ptrace warning on 31 bit.	16 years ago
reipl.S	…
reipl64.S	…
relocate_kernel.S	…
relocate_kernel64.S	…
s390_ext.c	[S390] Fix a lot of sparse warnings.	17 years ago
s390_ksyms.c	[S390] ftrace: function tracer backend for s390	16 years ago
setup.c	[S390] convert cpu related printks to pr_xxx macros.	16 years ago
signal.c	[S390] fix system call parameter functions.	16 years ago
smp.c	[S390] convert cpu related printks to pr_xxx macros.	16 years ago
stacktrace.c	[S390] Fix stacktrace compile bug.	17 years ago
sys_s390.c	[S390] fix s390x_newuname	16 years ago
syscalls.S	compat: generic compat get/settimeofday	17 years ago
time.c	[S390] convert time printks to pr_xxx macros.	16 years ago
topology.c	Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6	16 years ago
traps.c	[S390] Move show_regs to traps.c.	17 years ago
vdso.c	[S390] introduce vdso on s390	16 years ago
vmlinux.lds.S	[S390] Fix alignment of initial kernel stack.	16 years ago
vtime.c	[PATCH] idle cputime accounting	16 years ago