Re: [PATCH 09/33] x86-64: update iommu/dma mapping functions to sg helpers

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On Mon, 16 Jul 2007 22:10:03 +0200
Jens Axboe <jens.axboe@xxxxxxxxxx> wrote:

> On Mon, Jul 16 2007, Andrew Morton wrote:
> > On Mon, 16 Jul 2007 11:47:23 +0200
> > Jens Axboe <jens.axboe@xxxxxxxxxx> wrote:
> > 
> > > This prepares x86-64 for sg chaining support.
> > > 
> > > Additional improvements/fixups for pci-gart from
> > > Benny Halevy <bhalevy@xxxxxxxxxxx>
> > > 
> > > Cc: ak@xxxxxxx
> > > Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx>
> > > ---
> > >  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 keep rebasing sglist and the other branches I pull into for-akpm,
> so you can just re-enable the for-akpm pull when the a) is true.

Andi's tree is very out of date and is about to be damaged (to what extent
I don't yet know) by a xen merge.  I don't know if a) is going to happen.


Things are more than usually messy this time around.
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