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* Paul Mackerras <paulus@samba.org> wrote: > Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the > deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been > broken on powerpc, because we end up counting user time twice: once in > timer_interrupt() and once in update_process_times(). > > This fixes the problem by pulling the code in update_process_times > that updates utime and stime into a separate function called > account_process_tick. If CONFIG_VIRT_CPU_ACCOUNTING is not defined, > there is a version of account_process_tick in kernel/timer.c that > simply accounts a whole tick to either utime or stime as before. If > CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to > implement account_process_tick. > > This also lets us simplify the s390 code a bit; it means that the s390 > timer interrupt can now call update_process_times even when > CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a > suitable account_process_tick(). > > Signed-off-by: Paul Mackerras <paulus@samba.org> lets push this towards Linus via the scheduler tree, ok? Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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