On Sun, Sep 14, 2014 at 09:12:08AM +0800, Amos Kong wrote:
...
> > > > diff --git a/drivers/char/hw_random/core.c
> > > > b/drivers/char/hw_random/core.c
> > > > index c591d7e..b5d1b6f 100644
> > > > --- a/drivers/char/hw_random/core.c
> > > > +++ b/drivers/char/hw_random/core.c
> > > > @@ -195,8 +195,7 @@ static ssize_t rng_dev_read(struct file *filp, char
> > > > __user *buf,
> > > >
> > > > mutex_unlock(&rng_mutex);
> > > >
> > > > - if (need_resched())
> > > > - schedule_timeout_interruptible(1);
> > > > + schedule_timeout_interruptible(10);
Problem only occurred in non-smp guest, we can improve it to:
if(!is_smp())
schedule_timeout_interruptible(10);
is_smp() is only available for arm arch, we need a general one.
> > > >
> > > > if (signal_pending(current)) {
> > > > err = -ERESTARTSYS;
> > > > --
--
Amos.
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