lkml.org 
[lkml]   [2017]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/3] clockevents: Retry programming min delta up to 10 times
On Thu, 19 Oct 2017 15:29:28 +0200 (CEST)
Thomas Gleixner <tglx@linutronix.de> wrote:

> On Thu, 19 Oct 2017, Matt Redfearn wrote:
> > On 19/10/17 13:43, Thomas Gleixner wrote:
> > > delta = 0;
> > > for (i = 0; i < 10; i++) {
> > > delta += dev->min_delta_ns;
> > > dev->next_event = ktime_add_ns(ktime_get(), delta);
> > > clc = .....
> > > .....
> > >
> > > That makes it more likely to succeed fast. Hmm?
> >
> > That will set the target time to increasing multiples of min_delta_ns in the
> > future, right?
>
> Yes, but without fiddling with min_delta_ns itself.

Grumpf, more extra code for yet another piece of broken hardware
I guess.

> > Sure, it should make it succeed faster - I'll make it like
> > that. Are you OK with the arbitrarily chosen 10 retries?
>
> I lost my crystalball so I have to trust yours :)

The alternative implementation would be to do the retries in
the clockevent driver itself. Then that particular driver can
choose the correct number of retries, no?

--
blue skies,
Martin.

"Reality continues to ruin my life." - Calvin.

\
 
 \ /
  Last update: 2017-10-22 17:26    [W:0.086 / U:1.344 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site