7.2-STABLE: swap on ZFS v13

[Dan Naumov]

Pardon my perhaps stupid question, but what exactly does the "-o
org.freebsd:swap=on" option do? Couldn't find anything related during
a quick glance at the zfs manpage (on a 7.2-release/amd64 system with
zfsv6).

- Sincerely,
Dan Naumov



On Tue, Jun 23, 2009 at 1:01 PM, Simun Mikecin<numisemis at yahoo.com> wrote:
>
> Hi!
>
> Before ZFS v13 import to the 7-STABLE branch, it was a well known fact that swap on ZFS volume (zvol) will not work.
> Recently, I tried to use swap on ZFS v13 (7-STABLE/amd64). It seems that it works.
>
> I used 4k for the volblocksize as that is equivalent to hardware page size.
> I tried with compression enabled and disabled. Enabling compression reduces number of bytes that need to be swapped in and out to the zvol.
>
> zfs create -o volblocksize=4k -o compression=on -o org.freebsd:swap=on -V 4g tank/swap
> swapon /dev/zvol/tank/swap
>
> Is there anybody else who tried 7-STABLE/amd64 with swap on ZFS v13? Does it work or not?
>
>
>
>
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