[0/6] HMM updates, improvements and fixes v2

Message

Jerome Glisse Oct. 19, 2018, 4:04 p.m. UTC

From: Jérôme Glisse <[e-mail]>

[Andrew this is for 4.20, stable fixes as cc to stable]

Few fixes that only affect HMM users. Improve the synchronization call
back so that we match was other mmu_notifier listener do and add proper
support to the new blockable flags in the process.

For curious folks here are branches to leverage HMM in various existing
device drivers:

https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-nouveau-v01
https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-radeon-v00
https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-intel-v00

More to come (amd gpu, Mellanox, ...)

I expect more of the preparatory work for nouveau will be merge in 4.20
(like we have been doing since 4.16) and i will wait until this patchset
is upstream before pushing the patches that actualy make use of HMM (to
avoid complex tree inter-dependency).

Jérôme Glisse (4):
  mm/hmm: fix utf8 ...
  mm/hmm: properly handle migration pmd v3
  mm/hmm: use a structure for update callback parameters v2
  mm/hmm: invalidate device page table at start of invalidation

Ralph Campbell (2):
  mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly
    v3
  mm/hmm: fix race between hmm_mirror_unregister() and mmu_notifier
    callback

 include/linux/hmm.h  |  33 +++++++----
 mm/hmm.c             | 134 +++++++++++++++++++++++++++++--------------
 mm/page_vma_mapped.c |  24 +++++++-
 3 files changed, 137 insertions(+), 54 deletions(-)