Date: Wed, 9 Nov 2022 15:07:40 -0800 (PST) From: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> To: Gordon Bergling <gbe@FreeBSD.org> Cc: Mike Karels <mike@karels.net>, freebsd-arm@FreeBSD.org, jmg@FreeBSD.org Subject: Re: adding swap when expanding root filesystem Message-ID: <202211092307.2A9N7eDW003382@gndrsh.dnsmgr.net> In-Reply-To: <Y2oCJC7OD31JUtOc@lion.ttyv0.de>
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-- Start of PGP signed section. > 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. > > > > 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. > > > > 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. > > > > Thoughts? > > > > 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. +1 please. > > And the genet(4) driver doesn't support netdump(4). > > --Gordon -- End of PGP section, PGP failed! -- Rod Grimes rgrimes@freebsd.org
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