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Re: port-sparc/35363 (MP broken for some 50 MHz SuperSPARC (390Z50) processors on 3.1)
The following reply was made to PR port-sparc/35363; it has been noted by GNATS.
From: Tobias Ulmer <tobiasu%tmux.org@localhost>
Subject: Re: port-sparc/35363 (MP broken for some 50 MHz SuperSPARC (390Z50)
processors on 3.1)
Date: Mon, 12 Apr 2021 03:14:06 +0200
On Sat, Mar 20, 2021 at 04:02:51PM +0000, mrg%NetBSD.org@localhost wrote:
> Synopsis: MP broken for some 50 MHz SuperSPARC (390Z50) processors on 3.1
> State-Changed-From-To: open->feedback
> State-Changed-By: mrg%NetBSD.org@localhost
> State-Changed-When: Sat, 20 Mar 2021 16:02:51 +0000
> netbsd/sparc got many many smp fixes since 3.1 days. if you still have
> the system, does this problem still occur for you? thanks.
I have a set of these CPUs I believe (390Z50 is the cache?), but they're
not in a machine.
They had the same issue last time I've tested them on 8.99something
(iirc). Nonsensical segfaults that can't be nailed down. Same behavior
on OpenBSD. true(1) dumping core, sh around setjmp/longjmp.
My money is on a silicon bug that's not handled by the known errata.
I've attempted (half-heartedly) to find a workaround in the SunOS source,
but could not do it.
Happy to ship these modules to a developer who wants to take a stab at
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