[PATCH hmm 15/15] mm/hmm: remove hmm_mirror and related
jgg at mellanox.com
Mon Oct 21 18:57:42 UTC 2019
On Mon, Oct 21, 2019 at 02:38:24PM -0400, Jerome Glisse wrote:
> On Tue, Oct 15, 2019 at 03:12:42PM -0300, Jason Gunthorpe wrote:
> > From: Jason Gunthorpe <jgg at mellanox.com>
> > The only two users of this are now converted to use mmu_range_notifier,
> > delete all the code and update hmm.rst.
> I guess i should point out that the reasons for hmm_mirror and hmm
> was for:
> 1) Maybe define a common API for userspace to provide memory
> placement hints (NUMA for GPU)
Do you think this needs special code in the notifiers?
> 2) multi-devices sharing same mirror page table
Oh neat, but I think this just means the GPU driver has to register a
single notifier for multiple GPUs??
> But support for multi-GPU in nouveau is way behind and i guess such
> optimization will have to re-materialize what is necessary once that
Sure, it will be easier to understand what is needed with a bit of
> Note this patch should also update kernel/fork.c and the mm_struct
> definition AFAICT. With those changes you can add my:
Can you please elaborate what updates you mean? I'm not sure.
Maybe I already got the things you are thinking of with the get/put
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