On 1 Jun, Andre Guibert de Bruet wrote: > > On Wed, 1 Jun 2005, Alexander Leidinger wrote: > >> Poul-Henning Kamp <phk_at_phk.freebsd.dk> wrote: >> >>> Maybe the simplest solution is also the best: keep track of the >>> dependencies and do the cleanup leaf->root on the resulting tree. It might not even be necessary to use a tree. It might be possible to just use a list like vfs_unmountall(). >> How many userland processes have to be running and consuming memory which >> isn't available as physical RAM at this point in the shutdown sequence? >> >> Wouldn't a loop like the following be enough? >> while swap >> umount unbusy-FS >> swap-off swap >> >> This assumes that swap-off doesn't turns off the swap if it isn't able to put >> everything back into other swap or physical RAM areas. > > I would think that one would want to disable swapping before the unmount > of filesystems for the very fact you could have vnode-backed swapspace in > use. This order doesn't work either because you might only have 128 MB of RAM, but 1 GB of data in /tmp, which is stored on a swap-backed memory disk. In this case you'll have to unmount /tmp and toss the md contents before you disable swap.Received on Wed Jun 01 2005 - 23:07:52 UTC
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