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Free UMA zones when a pass(4) instance goes away.

Description

Free UMA zones when a pass(4) instance goes away.

If the UMA zones are not freed, we get warnings about re-using the
sysctl variables associated with the UMA zones, and we're leaking
the other memory associated with the zone structures. e.g.:

sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.size)!
sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.flags)!
sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.bucket_size)!
sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.bucket_size_max)!
sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.keg.name)!
sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.keg.rsize)!
sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.keg.ppera)!
sysctl_warn_reuse: can't re-use a leaf (vm.uma.pass44.keg.ipers)!

Also, correctly clear the PASS_FLAG_ZONE_INPROG flag in
passcreatezone(). The way it was previously done, it would have
had set the flag and cleared all other flags that were set at
that point.

MFC after: 1 week
Sponsored by: Spectra Logic

Details

Provenance
kenAuthored on Jan 13 2022, 3:50 PM
Parents
R10:ca46f3289d96: xen: use an hypercall for shutdown and reboot
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