Date: Sat, 16 Jul 2022 23:24:47 -0700 From: Mark Millard <marklmi@yahoo.com> To: Glen Barber <gjb@freebsd.org> Cc: dev-commits-src-main@freebsd.org Subject: Re: git: 1dfcff294e44 - main - release: increase IMAGE_SIZE for arm, arm64, riscv Message-ID: <DBED097F-00BD-467C-8CA3-49857DA35456@yahoo.com> In-Reply-To: <AE47C47B-33F7-4236-8A23-688C40340EA7@yahoo.com> References: <84410D65-6F86-44E5-8B14-8A523C9919C7.ref@yahoo.com> <84410D65-6F86-44E5-8B14-8A523C9919C7@yahoo.com> <20220713201327.GY30607@FreeBSD.org> <7F4F9683-B4DE-4F65-BBD7-027039A0C270@yahoo.com> <20220713204227.GA30607@FreeBSD.org> <8A02A4A4-9F3A-47F2-9985-EA2151043BB7@yahoo.com> <4D903E5A-58FB-4516-AC53-AEDFF48564A7@yahoo.com> <20220714152125.GB30607@FreeBSD.org> <3E2DCFBD-CC8F-4C13-B18C-B7DA26ED8E84@yahoo.com> <AE47C47B-33F7-4236-8A23-688C40340EA7@yahoo.com>
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On 2022-Jul-15, at 17:41, Mark Millard <marklmi@yahoo.com> wrote:
> FYI for the new snapshot build of 13.1-STABLE:
>=20
> # mdconfig -u0 -f =
FreeBSD-13.1-STABLE-arm64-aarch64-RPI-20220715-831c6b8edda-251792.img=20
> # gpart show md0
> =3D> 63 10485697 md0 MBR (5.0G)
> 63 2016 - free - (1.0M)
> 2079 102312 1 fat32lba [active] (50M)
> 104391 10381329 2 freebsd (5.0G)
> 10485720 40 - free - (20K)
>=20
> So: still has the 2016 and 2079 that do not seem to match
> what /usr/src/release/ materials would indicate --and the
> 2079 leads to poor alignment for a microsd cards, for
> example.
>=20
> But, at least something was produced this time. There is
> now a 13.1-STABLE snapshot to test the handling related
> to the new UFS/FFS superblock validations.
In the live build environment that makes the images,
what is:
# sysctl kern.geom.part.mbr.enforce_chs
kern.geom.part.mbr.enforce_chs: 0
I ask because of the description:
QUOTE
kern.geom.part.mbr.enforce_chs: 0
Specify how the Master Boot Record (MBR) module does =
alignment.
If this variable is set to a non-zero value, the module =
will
automatically recalculate the user-specified offset and =
size for
alignment with the CHS geometry. Otherwise the values will =
be
left unchanged.
END QUOTE
In particular, the text about non-zero values leading to:
QUOTE
the module will
automatically recalculate the user-specified offset and =
size for
alignment with the CHS geometry
END QUOTE
This sounds like a potential way to not end up with the
what the /usr/src/release handling requests for the
small board computer images. It might explain the
mismatched alignment that I've been reporting.
=3D=3D=3D
Mark Millard
marklmi at yahoo.com
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