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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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appldata	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6	16 years ago
boot	…
crypto	[S390] convert cpacf printks to pr_xxx macros.	16 years ago
hypfs	Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6	16 years ago
include/asm	virtio: use KVM_S390_VIRTIO_RING_ALIGN instead of relying on pagesize	16 years ago
kernel	[PATCH] idle cputime accounting	16 years ago
kvm	KVM: s390: Fix problem state handling in guest sigp handler	16 years ago
lib	[S390] Move private simple udelay function to arch/s390/lib/delay.c.	17 years ago
math-emu	[S390] remove -traditional	17 years ago
mm	aio: make the lookup_ioctx() lockless	16 years ago
oprofile	Combine instrumentation menus in kernel/Kconfig.instrumentation	18 years ago
Kconfig	[S390] Remove config options.	16 years ago
Kconfig.debug	[S390] DEBUG_PAGEALLOC support for s390.	17 years ago
Makefile	[S390] Add processor type march=z10 and a processor type safety check.	16 years ago
defconfig	[S390] Update default configuration.	16 years ago