Sebastien Marie <[email protected]> wrote: > On Wed, Nov 20, 2019 at 11:47:39PM -0800, Sean Kamath wrote: > > Hello. > > > > Can someone provide me a pointer to how to do this? > > > > I have a bunch of Alix 2d13 boxes. With 6.6, I’ve found I need more swap > > than the default layout on a 2G compact flash drive has. So, I got some 1G > > USB thumb drives, and want to use JUST those for swap. Despite different > > attempts (setting the mount_opts to xx, setting mount_opts to > > “priority=1”), I can’t seem to prevent the swap on the boot disk being > > added with priority = 0. > > > > Can I do anything to turn it off or change the priority, short of changing > > the filesystem type? > > If I recall correctly, the swap on the boot disk is directly added by the > kernel, and not by rc(8). It is why priority in fstab(5) is ignored.
config bsd swap generic It is part of the "swap generic" logic. > But you could change the priority of an already added swap with swapctl(8): > > # swapctl -c -p 1 myduid.b > > And you could automatically run it at boot-time by adding the command line in > /etc/rc.local file, which is sourced by rc(8). > > # echo 'swapctl -c -p 1 myduid.b' >> /etc/rc.local > > This way, at boot time: > - kernel adds the boot disk swap with priority 0 > - rc(8) adds the second swap with priority 0 (as configured in fstab(5)) > - rc(8) via rc.local changes the boot disk swap with priority 1 > - system will run with two swaps: > - second swap, priority 0, so used first > - boot disk swap, priority 1, used if second swap is full or by kernel for > dumping kernel core > > I hope it helps. It could help. Or, leave it alone. If you hit swap, you've learned something: Your machine is too small.
