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Date: Tue, 23 Aug 2011 17:10:41 +0200
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
To: Rick Macklem <rmacklem@uoguelph.ca>
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Cc: Hiroki Sato <hrs@FreeBSD.org>, current@FreeBSD.org,
	Benjamin Kaduk <kaduk@MIT.EDU>
Subject: Re: fsid change of ZFS?
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On Tue, Aug 23, 2011 at 10:09:41AM -0400, Rick Macklem wrote:
> Ok, I'll admit I wasn't very fond of a fixed table that would inevitably
> get out of date someday, either.
>=20
> I didn't think hashing for the cases not in the table was worth the effor=
t,
> but doing a hash instead of a table seems reasonable.
>=20
> I see that ZFS only uses the low order 8 bits, so I'll try and come up
> with an 8bit hash solution and will post a patch for testing/review soon.
>=20
> I don't think the vfs_sysctl() is that great a concern, given that it
> appears to be deprecated already anyhow. (With an 8bit hash, vfs_typenum
> won't be that sparse.) I'll also make sure that whatever hash I use
> doesn't collide for the current list of file names (although I will inclu=
de
> code that handles a collision in the patch).

Sounds great. Thanks!

--=20
Pawel Jakub Dawidek                       http://www.wheelsystems.com
FreeBSD committer                         http://www.FreeBSD.org
Am I Evil? Yes, I Am!                     http://yomoli.com

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