Re: kern/57621: Updated 10.0_BETA macppc MP kernel prone to hangs

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

Hi,

I'm so sorry for the serious delay in my response; I'd been
occupied by another tasks.

On Mon, Sep 25, 2023 at 2:04 AM Havard Eidnes <he%uninett.no@localhost> wrote:
> As noted already, your patch has been applied, and at least the
> system no longer wedges as it did before.
>
> The two-lwp deadlock I observed after booting the kernel with the
> patch appears to be unrelated to the original issue I reported, and
> appears to be a VFS cache issue, yet to be diagnosed.
>
> I'm now running a "LOCKDEBUG.MP" kernel on this machine, and it has
> now managed to complete a full "build.sh -x ... release" without
> locking up, something which I could not do before, and the VFS issue
> has not re-surfaced either.

Thanks for your feedback. Yeah, LOCKDEBUG should be a nice approach.

> I would therefore say that the patch should be committed if it has
> not already, and also pulled up to netbsd-10.

I committed the patch and it already got pulled up into netbsd-10.

I guess that another symptoms are due to MD parts for powerpc. The
most suspicious is pmap for powerpc/oea. It really needs clean ups.
The second place is PR port-powerpc/56922.

But in either way, unfortunately, it exceeds capacity for us at the
very moment. I will examine further after 10.0RC1 is out.

Thanks,
rin