Hi, I think that the 1st and 3rd patches are pretty uncontroversial given how vtime_account() confusingly tries to do everything for CONFIG_VIRT_CPU_ACCOUNTING and CONFIG_IRQ_TIME_ACCOUNTING.
I believe the 2nd is also desired. vtime_account() is called two times per irq, sometimes more if softirqs are involved. So I think we want to optimize that by calling directly its specialized APIs when possible. There is still some work to do but I'm proceeding step by step. I may focuse more on that generic vtime implementation next time to implement cputime accounting for the tickmess patchset. That, for sure, will inspire for even more cputime optimizations/cleanups. Thanks. PS: tested on x86 and ppc64 (checked reliability of times and /proc/stat). But only built tested on s390 and ia64. Frederic Weisbecker (3): kvm: Directly account vtime to system on guest switch cputime: Specialize irq vtime hooks cputime: Separate irqtime accounting from generic vtime arch/ia64/kernel/time.c | 1 + arch/powerpc/kernel/time.c | 1 + arch/s390/kernel/vtime.c | 4 ++ include/linux/hardirq.h | 80 +++++++++++++++++++++++++++++++++++-------- include/linux/kernel_stat.h | 8 ---- include/linux/kvm_host.h | 12 +++++- kernel/sched/cputime.c | 8 ++-- kernel/softirq.c | 6 ++-- 8 files changed, 88 insertions(+), 32 deletions(-) -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
