lkml.org 
[lkml]   [2019]   [Aug]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Device to write to all (serial) consoles
On Fri, Aug 02, 2019 at 09:59:06PM +0200, Paul Menzel wrote:
> On 02.08.19 18:02, Greg Kroah-Hartman wrote:
> > On Fri, Aug 02, 2019 at 03:23:08PM +0200, Paul Menzel wrote:
> > > On a lot of devices, like servers, you have more than one serial console,
> > > and you do not always know, how they are numbered. Therefore, we start a
> > > console on ttyS0 and ttyS1.
>
> Because the cable is always connected to the port on the back side, and
> sometimes the port in the front has ID 0, and the one in the back 1, and
> other times vice versa. We do not want to track that, and it would be
> convenient to just write to both ports.

Sounds like an XY problem then: what you want is not writing to all ports,
but to have the port assignments stable (see also: disk device reordering).


Meow!
--
⢀⣴⠾⠻⢶⣦⠀ Latin: meow 4 characters, 4 columns, 4 bytes
⣾⠁⢠⠒⠀⣿⡁ Greek: μεου 4 characters, 4 columns, 8 bytes
⢿⡄⠘⠷⠚⠋ Runes: ᛗᛖᛟᚹ 4 characters, 4 columns, 12 bytes
⠈⠳⣄⠀⠀⠀⠀ Chinese: 喵 1 character, 2 columns, 3 bytes <-- best!

\
 
 \ /
  Last update: 2019-08-03 15:37    [W:0.502 / U:0.248 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site