Subject: Re: M_READONLY
To: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
From: Jason Thorpe <thorpej@shagadelic.org>
List: tech-net
Date: 09/20/2004 20:17:49
--Apple-Mail-18--682130695
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=US-ASCII; format=flowed


On Sep 20, 2004, at 6:05 PM, YAMAMOTO Takashi wrote:

> my point is, there's no reason to make all external storage read-only.
> what you need is M_EXT_READONLY i mentioned in another mail (or 
> M_EXT_RW).
> i didn't include it in the patch just because currently there's no code
> which need it in tree (afaik).

Sure.  But "external storage is read-only unless M_CLUSTER" has been 
part of our mbuf API for some time now, and 3rd parties have written 
code that assumes this.  So, "writable non-cluster external storage" 
needs to have an explicit flag to maintain compatibility.

         -- Jason R. Thorpe <thorpej@shagadelic.org>


--Apple-Mail-18--682130695
content-type: application/pgp-signature; x-mac-type=70674453;
	name=PGP.sig
content-description: This is a digitally signed message part
content-disposition: inline; filename=PGP.sig
content-transfer-encoding: 7bit

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (Darwin)

iD8DBQFBT51eOpVKkaBm8XkRAlrjAJ9ExYAfi5cfLb9EUZzDM9SMCYrg1ACdEO/M
T+bQRGzRVwYzZKMdoi15SrI=
=nKPG
-----END PGP SIGNATURE-----

--Apple-Mail-18--682130695--