Re: hmm_range_fault related fixes and legacy API removal v3

From: Ralph Campbell
Date: Thu Jul 25 2019 - 20:55:12 EST

On 7/25/19 5:16 PM, Jason Gunthorpe wrote:
On Wed, Jul 24, 2019 at 08:52:51AM +0200, Christoph Hellwig wrote:
Hi JÃrÃme, Ben and Jason,

below is a series against the hmm tree which fixes up the mmap_sem
locking in nouveau and while at it also removes leftover legacy HMM APIs
only used by nouveau.

The first 4 patches are a bug fix for nouveau, which I suspect should
go into this merge window even if the code is marked as staging, just
to avoid people copying the breakage.

Changes since v2:
- new patch from Jason to document FAULT_FLAG_ALLOW_RETRY semantics
- remove -EAGAIN handling in nouveau earlier

I don't see Ralph's tested by, do you think it changed enough to
require testing again? If so, Ralph would you be so kind?

In any event, I'm sending this into linux-next and intend to forward
the first four next week.


I have been testing Christoph's v3 with my set of v2 changes so
feel free to add my tested-by.