Re: [HMM v17 00/14] HMM (Heterogeneous Memory Management) v17
From: Andrew Morton
Date: Wed Feb 22 2017 - 03:16:16 EST
On Wed, 22 Feb 2017 18:19:15 +1100 Balbir Singh <bsingharora@xxxxxxxxx> wrote:
> On Fri, Jan 27, 2017 at 05:52:07PM -0500, J__r__me Glisse wrote:
> > Cliff note: HMM offers 2 things (each standing on its own). First
> > it allows to use device memory transparently inside any process
> > without any modifications to process program code. Second it allows
> > to mirror process address space on a device.
> > Change since v16:
> > - move HMM unaddressable device memory to its own radix tree and
> > thus find_dev_pagemap() will no longer return HMM dev_pagemap
> > - rename HMM migration helper (drop the prefix) and make them
> > completely independent of HMM
> > Migration can now be use to implement thing like multi-threaded
> > copy or make use of specific memory allocator for destination
> > memory.
> > Work is under way to use this feature inside nouveau (the upstream
> > open source driver for NVidia GPU) either 411 or 4.12 timeframe.
> > But this patchset have been otherwise tested with the close source
> > driver for NVidia GPU and thus we are confident it works and allow
> > to use the hardware for seamless interaction between CPU and GPU
> > in common address space of a process.
> > I also discussed the features with other company and i am confident
> > it can be use on other, yet, unrelease hardware.
> > Please condiser applying for 4.11
> Andrew, do we expect to get this in 4.11/4.12? Just curious.
I'll be taking a serious look after -rc1.
The lack of reviewed-by, acked-by and tested-by is a concern. It's
rather odd for a patchset in the 17th revision! What's up with that?
Have you reviewed or tested the patches?