Re: kern/55286: Kernel messages cause loss of serial console input

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR kern/55286; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
        Andreas Gustafsson <gson%gson.org@localhost>
Subject: Re: kern/55286: Kernel messages cause loss of serial console input
Date: Sun, 24 May 2020 14:50:35 +0200

 On Sat, May 23, 2020 at 06:10:01PM +0000, Andreas Gustafsson wrote:
 >  So, if I understand this correctly, this code is intended to support a
 >  nonstandard way of breaking into DDB (as opposed to the standard break
 >  condition) and will only work if the kernel happens to be printing
 >  something in polled mode at the time (!).
 
 no, it works fine even if nothing is being printed. I know, I'm using '+++++'
 as a key to enter ddb.
 
 >  
 >  To me this seems like a bad idea from the start, and I would prefer to
 >  simply remove this code rather than try to fix it.  Or does someone
 >  think it actually has some value?
 
 It definitively has some value. There are setups where BREAK can't be
 sent (e.g. qemu, Dell idrac, ...). I need it.
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --