linux-kernel - turn hmm migrate

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Message-Id: <20190814075928.23766-1-hch@lst.de>
Date:   Wed, 14 Aug 2019 09:59:18 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Ben Skeggs <bskeggs@...hat.com>
Cc:     Ralph Campbell <rcampbell@...dia.com>,
        Bharata B Rao <bharata@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: turn hmm migrate_vma upside down v3

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