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Date:      Tue, 09 May 2023 09:43:27 +0200
From:      Corvin =?ISO-8859-1?Q?K=F6hne?= <corvink@FreeBSD.org>
To:        Ed Maste <emaste@FreeBSD.org>, src-committers@FreeBSD.org,  dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org
Subject:   Re: git: 76887e84be97 - main - cpuset: increase userland maximum size to 1024
Message-ID:  <2f47388ab07eaeb820344e928adb96ff6f7a5916.camel@FreeBSD.org>
In-Reply-To: <0dadaa17917629e3399fe9acbab17eb60b63575d.camel@FreeBSD.org>
References:  <202305081826.348IQm9N040108@gitrepo.freebsd.org> <0dadaa17917629e3399fe9acbab17eb60b63575d.camel@FreeBSD.org>

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On Tue, 2023-05-09 at 08:59 +0200, Corvin K=C3=B6hne wrote:
> On Mon, 2023-05-08 at 18:26 +0000, Ed Maste wrote:
> > The branch main has been updated by emaste:
> >=20
> > URL:
> > https://cgit.FreeBSD.org/src/commit/?id=3D76887e84be975698b14699d7d0dfb=
157d73e9990
> >=20
> > commit 76887e84be975698b14699d7d0dfb157d73e9990
> > Author:=C2=A0=C2=A0=C2=A0=C2=A0 Ed Maste <emaste@FreeBSD.org>
> > AuthorDate: 2023-05-02 20:57:12 +0000
> > Commit:=C2=A0=C2=A0=C2=A0=C2=A0 Ed Maste <emaste@FreeBSD.org>
> > CommitDate: 2023-05-08 18:25:15 +0000
> >=20
> > =C2=A0=C2=A0=C2=A0 cpuset: increase userland maximum size to 1024
> > =C2=A0=C2=A0=C2=A0=20
> > =C2=A0=C2=A0=C2=A0 Hardware with more than 256 CPU cores is now availab=
le and will
> > become
> > =C2=A0=C2=A0=C2=A0 increasingly common.=C2=A0 Bump CPU_MAXSIZE (used fo=
r userland
> > cpuset_t
> > =C2=A0=C2=A0=C2=A0 sizing) to 1024 to define the ABI for FreeBSD 14.
> > =C2=A0=C2=A0=C2=A0=20
> > =C2=A0=C2=A0=C2=A0 PR:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 269572, 271213 [exp-run]
> > =C2=A0=C2=A0=C2=A0 Reviewed by:=C2=A0=C2=A0=C2=A0 mjg, jhb
> > =C2=A0=C2=A0=C2=A0 Relnotes:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 yes
> > =C2=A0=C2=A0=C2=A0 Sponsored by:=C2=A0=C2=A0 The FreeBSD Foundation
> > =C2=A0=C2=A0=C2=A0 Differential Revision: https://reviews.freebsd.org/D=
39941
> > ---
> > =C2=A0sys/sys/_cpuset.h | 2 +-
> > =C2=A01 file changed, 1 insertion(+), 1 deletion(-)
> >=20
> > diff --git a/sys/sys/_cpuset.h b/sys/sys/_cpuset.h
> > index b75ee595da3c..676f9855f384 100644
> > --- a/sys/sys/_cpuset.h
> > +++ b/sys/sys/_cpuset.h
> > @@ -40,7 +40,7 @@
> > =C2=A0#define=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0CPU_SETSIZ=
E=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0MAXCPU
> > =C2=A0#endif
> > =C2=A0
> > -#define=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0CPU_MAXSIZE=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0256
> > +#define=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0CPU_MAXSIZE=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A01024
> > =C2=A0
> > =C2=A0#ifndef=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0CPU_SETSIZ=
E
> > =C2=A0#define=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0CPU_SETSIZ=
E=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0CPU_MAXSIZE
>=20
> Hi Ed,
>=20
> this somehow breaks bhyve on my system. It immediately exits with
> "vm_run error -1" on startup.
>=20
>=20

Setting MAXCPU [1] to 1024 as well, solves the issue. Not sure if it's
a regression of your commit or a bhyve bug.

[1]
https://github.com/freebsd/freebsd-src/blob/20d8d9809a8c0a3ddd1d0156e77ec53=
a1ed95747/sys/amd64/include/param.h#L68


--=20
Kind regards,
Corvin

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