Date: Tue, 11 Nov 2025 08:30:54 -0800 From: bob prohaska <fbsd@www.zefox.net> To: freebsd-current@freebsd.org, freebsd-arm@freebsd.org Subject: Re: kernel: warning: total configured swap (493567 pages) exceeds maximum recommended amount Message-ID: <aRNkvhpTTm8hkGby@www.zefox.net> In-Reply-To: <aRMqTQLTnl12EBBi@int21h> References: <aRJ1RgThaq5eZNKc@int21h> <aRKUIeAydIPE8pHN@www.zefox.net> <aRMqTQLTnl12EBBi@int21h>
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On Tue, Nov 11, 2025 at 12:45:35PM +0000, void wrote: > On Mon, Nov 10, 2025 at 05:40:49PM -0800, bob prohaska wrote: > > On Mon, Nov 10, 2025 at 11:29:10PM +0000, void wrote: > > > > fstab entry for swap is: > > > /dev/label/growfs_swap none swap sw 0 0 > > > I've not seen any recognizable benefit in heeding that warning, but YMMV > > I've two Pi2's with 3.6G of swap and one with 1.7G of swap. All misbehave > > in the same way. > > > > If using USB you could try something like (as root) > > swapoff /dev/da0s2 > > gpart resize -i 2 -s 1700M /dev/da0s2 > > swapon /dev/da0s2 > > I'm thinking maybe raising this as a PR because that swap thing - it came > as-is, pre-installed. I downloaded the Nov 3rd armv7 snapshot, > wrote it to mmcsd and it was there. I have no idea how to resize or otherwise > modify /dev/label/growfs_swap or if it's a device or a file. > Raising it as a PR because if incorrectly sized by default then that's > a fault. > > I had planned to remove the above swap entry anyway and instead have > swap nfs-mounted. it'd be faster than anything local on the rpi2b. > I'm not sure how true that is when using a USB hard disk. On a Pi2/3 I gather the network adapter is a USB device as well, so both devices compete for USB. Never tested it myself, however. I will say the Pi4 is a vast improvement. > > If using microSD I'd be wary of swap; some very mysterious file corruption > > emerged on a Pi3 which had swap on the microSD. Not your situation, of course, > > just a cautionary tale. > > It's on the microsd by default for 16:main for armv7 too as per above > > > FWIW there is a random collection of "notes to self" at > > http://www.zefox.net/~fbsd/ > > It's poorly organized, out of date and at least partly wrong. > > Thanks, I'll have a read. Happy hunting! When you find things wrong or unclear please point them out to me. Thanks for writing, bob prohaskahelp
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