Date: Tue, 8 Nov 2022 08:15:48 +0100 From: Gordon Bergling <gbe@freebsd.org> To: Mike Karels <mike@karels.net> Cc: freebsd-arm@freebsd.org, jmg@freebsd.org Subject: Re: adding swap when expanding root filesystem Message-ID: <Y2oCJC7OD31JUtOc@lion.ttyv0.de> In-Reply-To: <202211071610.2A7GAcHl090048@mail.karels.net> References: <202211071610.2A7GAcHl090048@mail.karels.net>
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--aelShEj1XRrBDTia Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Mike, On Mon, Nov 07, 2022 at 10:10:38AM -0600, Mike Karels wrote: > This question is not really arm-specific, but I couldn't think of a better > mailing list for it. >=20 > There are peridic issues reported on small systems like Raspberry Pi > where people are running buildworld or poudriere and running out of > memory. As the user gets no control over the disk layout when installing, > there is no option to add swap space on the install image. I have added > swap space on a USB disk, but this is often not an option. It occurred > to me that it might be reasonable to add swap space before expanding > the root filesystem if there is sufficient space. I have a prototype, > and wondered if this is a good thing to do. Granted, this will often > create swap on microSD, which is not optimal, but probably better than > nothing. >=20 > The current prototype creates a swap partition which is 1/10 of the disk > if the disk is at least 15 GB and the initial root partition is no more > than 1/3 of the disk, but only up to 1.5x of physical memory. I would > probably enable this by default, but provide a way to disable it via a > kenv variable and/or a variable in /etc/rc.conf. >=20 > Thoughts? >=20 > Mike That would be very welcomed addition. I personally ofter run into problems when I try get a crash dump from my RPi4, since no dumpdev can be set without a separate swap partion. An USB stick worked for I while, but it just went dead at some point. And the genet(4) driver doesn't support netdump(4). --Gordon --aelShEj1XRrBDTia Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQGTBAEBCgB9FiEEYbWI0KY5X7yH/Fy4OQX2V8rP09wFAmNqAiJfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDYx QjU4OEQwQTYzOTVGQkM4N0ZDNUNCODM5MDVGNjU3Q0FDRkQzREMACgkQOQX2V8rP 09ztxggAnCQ2fqydmfBO9VsiTHYNh4tSlJpK8LNL7sMh+mdhFakjZPQtlmt8+Nnc xEqQpJ2xA/ceJtS5ROLRX/7VOVhUGBys0EjkyKnff+NgCCiK1pUMV37BzfMy6MiV 8eycQuCPfl2kOnXCCC9NUUvQawgM5lPwEyqInrXUQMjOsO/GDo/5yJ3xRioDLPE6 yIhgL1OjYxDuhXu2926gRUQ31FdRnj1GC3RYXc70xWhuesmb5ZwnqPcxjfeeZwpc vhWBwK0lw4MJgRPa+tAKcctWuSMIXGLxT6OEBcT6MvwrF+ga9em+amKP7JlCJa9f TUAquQuWw3AX9MEXL+jb4Jv54DKAwA== =frm+ -----END PGP SIGNATURE----- --aelShEj1XRrBDTia--
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