linux-kernel - Re: [patch 0/8] x86: UV - XPC fixes with related support functionality V2.

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Message-ID: <20091123181049.GA5220@elte.hu>
Date:	Mon, 23 Nov 2009 19:10:49 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Robin Holt <holt@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	tglx@...utronix.de, Jack Steiner <steiner@....com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [patch 0/8] x86: UV - XPC fixes with related support
 functionality V2.


* Ingo Molnar <mingo@...e.hu> wrote:

> * Robin Holt <holt@....com> wrote:
> 
> > 
> > The UV BIOS has been updated to implement some of our interface
> > functionality differently than originally expected.  These patches
> > update us to that working bios and include a few minor bug fixes
> > which prevent us from doing significant testing on real hardware.
> > 
> > Changes from V1:
> > 
> > - Actually include the patch introducing the gru_read_gpa.  This
> >   was missed in the V1 submission.
> > 
> > - One additional BIOS change has the OS no longer passing blade
> >   to the BIOS when registering a message queue watchlist.
> 
> Note, the patches are a bit hard to review without diffstats - mind 
> generating them for future patches? Also, putting a 'summary' diffstat 
> (the total diffstat effect of all patches) into the 0/8 description mail 
> is common courtesy that is much welcome by maintainers and reviewers as 
> well.

Ah, sorry - they were there, just merged together with the patch so i 
missed them.

Regarding the patches - i still very much dislike how the code 
interfaces to the 'BIOS'. The drivers/misc/sgi-xp/ code looks rather 
messy.

Why isnt a pure hardware interface exposed, as both hpa and me suggested 
in the past?

Anyway ... these bits got merged via -mm in the past so i guess it could 
be done there in the future too - the series does not look horrible - 
but the whole concept ought to be done in a cleaner way.

	Ingo
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