Re: [Xen-devel] [PATCH v2 1/2] Xen/Keyhandler: Rework process of nonirq keyhandler

["Lan, Tianyu" <tianyu.lan@xxxxxxxxx>]

On 10/12/2016 9:19 PM, Jan Beulich wrote:
> > > > On 12.10.16 at 09:58, <tianyu.lan@xxxxxxxxx> wrote:
> > --- a/xen/drivers/char/console.c
> > +++ b/xen/drivers/char/console.c
> > @@ -347,7 +347,7 @@ static void switch_serial_input(void)
> >  static void __serial_rx(char c, struct cpu_user_regs *regs)
> >  {
> >      if ( xen_rx )
> > -        return handle_keypress(c, regs);
> > +        return handle_keypress(c, regs, true);
> I think it would be nice to pass true here only when in polling mode,
> unless you know or can deduce that the a similar problem also exists
> in IRQ mode. Perhaps you could simply move the !in_irq() here?
That's a good idea. Thanks.

> (Of course the new function parameter would then want to be renamed.)
Since the issue happens when handle_keypress() runs in a timer handler,
how about to name new parameter "intimer"? __serial_rx() is called in a 
timer handler or interrupt handler. Or do you have other suggestion?
> Jan
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