[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-rt-users
Subject:    Re: How to modify priority uart/serial interrupt on 3.14.23-rt20?
From:       Austin Schuh <austin () peloton-tech ! com>
Date:       2014-11-18 18:40:50
Message-ID: CANGgnMZqGLhRUaCRfD1egLp-qvsUX0hZWKcaGJzLwnj3_khGtQ () mail ! gmail ! com
[Download RAW message or body]

2 ways come to mind.  I've done one of them.  Others may have better
suggestions.

1) After you open the uart, iterate through /proc/, find the uart
interrupt thread, and bump it's priority.

2) Set up a background task which polls /proc/ for the uart interrupt
thread and bumps the priority.

(Sigh, resending since I forgot to use plain-text again...)

Austin

On Tue, Nov 18, 2014 at 1:11 AM, Lampersperger Andreas
<lampersperger.andreas@heidenhain.de> wrote:
> Hello,
>
> does anyone have a hint how modify (increase) the priority of
> the serial/uart interrupt on a 3.14.23-rt20 kernel?
>
> AFAIK the kernel thread for serial communication is created
> when the communication starts, but I want to change the
> priority when the driver loads (modprobe 8250).
>
> Thank's for your help!
> Andreas
>
> ------------------------------------------------------------------------------------------------------
> Registergericht: Traunstein / Registry Court: HRB 275 - Sitz / Head Office: Traunreut
> Aufsichtsratsvorsitzender / Chairman of Supervisory Board: Rainer Burkhard
> Geschäftsführung / Management Board: Thomas Sesselmann (Vorsitzender / Chairman), Michael Grimm
>
> E-Mail Haftungsausschluss / E-Mail Disclaimer: http://www.heidenhain.de/disclaimer
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
[prev in list] [next in list] [prev in thread] [next in thread]