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Date:	Tue, 17 Jul 2007 09:56:37 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	ak@...e.de
Subject: Re: [PATCH 09/33] x86-64: update iommu/dma mapping functions to sg
	helpers

On Tue, Jul 17 2007, Jens Axboe wrote:
> On Mon, Jul 16 2007, Andrew Morton wrote:
> > On Mon, 16 Jul 2007 22:10:03 +0200
> > Jens Axboe <jens.axboe@...cle.com> wrote:
> > 
> > > On Mon, Jul 16 2007, Andrew Morton wrote:
> > > > On Mon, 16 Jul 2007 11:47:23 +0200
> > > > Jens Axboe <jens.axboe@...cle.com> wrote:
> > > > 
> > > > > This prepares x86-64 for sg chaining support.
> > > > > 
> > > > > Additional improvements/fixups for pci-gart from
> > > > > Benny Halevy <bhalevy@...asas.com>
> > > > > 
> > > > > Cc: ak@...e.de
> > > > > Signed-off-by: Jens Axboe <jens.axboe@...cle.com>
> > > > > ---
> > > > >  arch/x86_64/kernel/pci-calgary.c |   25 ++++++++------
> > > > >  arch/x86_64/kernel/pci-gart.c    |   63 ++++++++++++++++++++-----------------
> > > > >  arch/x86_64/kernel/pci-nommu.c   |    5 ++-
> > > > >  3 files changed, 51 insertions(+), 42 deletions(-)
> > > > 
> > > > This causes fairly extensive destruction of 2.6.23 changes which are
> > > > pending in Andi's tree.
> > > > 
> > > > I shall drop the block tree until a) Andi has merged the pending Calgary
> > > > changes and b) the block tree has been fixed up to account for those (and
> > > > other) changes.
> > > > 
> > > > Really, this was the perfectly worst time possible to go tromping all over
> > > > everyone else's trees.
> > > 
> > > Well, that's a bit hard for me to know, all I can do is push my stuff to
> > > for-akpm so that it gets -mm exposure. If I don't, then you are yelling
> > > at me as well :-)
> > 
> > It is to be expected that there will be conflicts when making large-scale
> > changes like this while there is 25MB of unmerged diff sitting out in 50
> > different trees.  Doing it around the -rc1 time would be better.
> > 
> > Even better would be not doing it at all: add the necessary stuff into the
> > block core and then send the followup work to the relevant maintainers. ie:
> > standard practice.
> 
> I'll do that. Most of the stuff is trivial, but the x86-64 iommu changes
> are probably the most tricky and invasive of them all.

OK, this is what I did:

Split the set into 3, in the following order:

CORE -> DRIVERS -> ARCH

So that's 3 branches, core is based off master, drivers off core, and
arch off drivers. I'll push core+drivers into #for-akpm for testing,
then the arch bits will stay undisturbed until acked by maintainers.

-- 
Jens Axboe

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