On Wed, Dec 19, 2007 at 02:08:14PM -0300, Werner Almesberger wrote:
> Chia-I Wu wrote:
> > + msleep(90);
>
> Hmm, such a long msleep isn't so nice. How about this ?
Mh, I don't really understand this. it's msleep, not mdelay!
msleep very much schedules the current task away, without any
busy-waiting.
> schedule_timeout_uninterruptible(msecs_to_jiffies(90)+1);
>
> This will wait at least 90ms, without keeping the CPU busy.
from kernel/timer.c
void msleep(unsigned int msecs)
{
unsigned long timeout = msecs_to_jiffies(msecs) + 1;
while (timeout)
timeout = schedule_timeout_uninterruptible(timeout);
}
Cheers,
--
- Harald Welte <[EMAIL PROTECTED]> http://openmoko.org/
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