linux-kernel - Re: A proposal

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 04 Aug 2006 15:04:35 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Andrew Morton <akpm@...l.org>
Cc:	Jeremy Fitzhardinge <jeremy@...source.com>, greg@...ah.com,
	zach@...are.com, linux-kernel@...r.kernel.org, torvalds@...l.org,
	hch@...radead.org, jlo@...are.com, xen-devel@...ts.xensource.com,
	simon@...source.com, ian.pratt@...source.com, jeremy@...p.org
Subject: Re: A proposal - binary

On Thu, 2006-08-03 at 21:18 -0700, Andrew Morton wrote:
> > As far as LKML is concerned, the only interface which matters is the 
> > Linux -> <something> interface, which is defined within the scope of the 
> > Linux development process.  That's what paravirt_ops is intended to be.
> 
> I must confess that I still don't "get" paravirtops.  AFACIT the VMI
> proposal, if it works, will make that whole layer simply go away.  Which
> is attractive.  If it works.

Everywhere in the kernel where we have multiple implementations we want
to select at runtime, we use an ops struct.  Why should the choice of
Xen/VMI/native/other be any different?

Yes, we could force native and Xen to work via VMI, but the result would
be less clear, less maintainable, and gratuitously different from
elsewhere in the kernel.  And, of course, unlike paravirt_ops where we
can change and add ops at any time, we can't similarly change the VMI
interface because it's an ABI (that's the point: the hypervisor can
provide the implementation).

I hope that clarifies,
Rusty.
-- 
Help! Save Australia from the worst of the DMCA: http://linux.org.au/law

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/