Subject: port-i386/2136: kernels with -O2 break pcvt (at least)
To: None <gnats-bugs@NetBSD.ORG>
From: Michael Graff <>
List: netbsd-bugs
Date: 02/26/1996 17:24:14
>Number:         2136
>Category:       port-i386
>Synopsis:       kernels with -O2 break pcvt (at least)
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    gnats-admin (GNATS administrator)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 26 18:35:02 1996
>Originator:     Michael Graff
>Organization:  yes, we do know everything
>Release:        26-Feb-1996
System: NetBSD 1.1A NetBSD 1.1A (DARKWATCH) #0: Mon Feb 26 15:55:39 CST 1996 i386

It seems that compiling a kernel with -O2 still does not do the right
thing on the i386.  I notice this problem mostly on the i486 I have, but
even the pentathing I also run has screen problems from time to time.

My main concern is that if this is a compiler problem, what else may
be broken, in the kernel or in userland, because of it?
Varies ; the 486 always has the problem, the pentathing, once in a while,
especially when leaving X or the machine is up for a long time.
Compiling a kernel with -O fixes it, or at least appears to hide it.