On 8/14/19 12:59 AM, Christoph Hellwig wrote:

Hi Jérôme, Ben and Jason,

below is a series against the hmm tree which starts revamping the migrate_vma functionality. The prime idea is to export three slightly lower level functions and thus avoid the need for migrate_vma_ops callbacks.

Diffstat:

 7 files changed, 282 insertions(+), 614 deletions(-)

A git tree is also available at:

 git://git.infradead.org/users/hch/misc.git migrate_vma-cleanup.3

Gitweb:

 http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/migrate_vma-cleanup.3

Changes since v2:

• don't unmap pages when returning 0 from nouveau_dmem_migrate_to_ram
• minor style fixes
• add a new patch to remove CONFIG_MIGRATE_VMA_HELPER

Changes since v1:

• fix a few whitespace issues
• drop the patch to remove MIGRATE_PFN_WRITE for now
• various spelling fixes
• clear cpages and npages in migrate_vma_setup
• fix the nouveau_dmem_fault_copy_one return value
• minor improvements to some nouveau internal calling conventions

Some of the patches seem to have been mangled in the mail. I was able to edit them and apply to Jason's tree https://github.com/jgunthorpe/linux.git mmu_notifier branch. So for the series you can add:

Tested-by: Ralph Campbell rcampbell@nvidia.com