Re: [PATCH] fix granularity of task_u/stime()
From: Stanislaw Gruszka
Date: Wed Nov 11 2009 - 07:13:36 EST
Hi Hidetoshi
On Tue, Nov 10, 2009 at 02:47:34PM +0900, Hidetoshi Seto wrote:
> Remove casting to clock_t from task_u/stime(), and keep granularity of
> cputime_t over the calculation.
>
> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
> ---
> kernel/sched.c | 21 ++++++++++++---------
> 1 files changed, 12 insertions(+), 9 deletions(-)
>
> diff --git a/kernel/sched.c b/kernel/sched.c
> index 28dd4f4..1632e82 100644
> --- a/kernel/sched.c
> +++ b/kernel/sched.c
> @@ -5171,41 +5171,44 @@ cputime_t task_stime(struct task_struct *p)
> return p->stime;
> }
> #else
> +
> +#ifndef nsecs_to_cputime
> +# define nsecs_to_cputime(__nsecs) msecs_to_cputime((__nsecs) / NSEC_PER_MSEC)
> +#endif
> +
I would like to test, but unfortunately with the patch kernel not build
on my system:
kernel/built-in.o: In function `task_utime':
/usr/src/rhel5/linux-2.6/kernel/sched.c:5187: undefined reference to
`__udivdi3'
kernel/built-in.o: In function `task_stime':
/usr/src/rhel5/linux-2.6/kernel/sched.c:5208: undefined reference to
`__udivdi3'
make: *** [.tmp_vmlinux1] Error 1
Cheers
Stanislaw
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