linux-kernel - Re: [GIT PULL] Folio patches for 5.18 (MM part)

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Date:   Mon, 21 Mar 2022 15:31:21 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     David Hildenbrand <david@...hat.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
        Hugh Dickins <hughd@...gle.com>,
        Alex Sierra <alex.sierra@....com>,
        Alistair Popple <apopple@...dia.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Mike Rapoport <rppt@...nel.org>,
        William Kucharski <william.kucharski@...cle.com>
Subject: Re: [GIT PULL] Folio patches for 5.18 (MM part)

On Mon, Mar 21, 2022 at 04:24:08PM +0100, David Hildenbrand wrote:
> On 21.03.22 16:16, David Hildenbrand wrote:
> > On 21.03.22 14:30, Matthew Wilcox wrote:
> >> Hi Linus,
> >>
> >> This is the first of two folio-related pull requests for this merge
> >> window.  This is the MM side of things and we had some unfortunate
> >> complex merge conflicts to resolve.  I decided to redo my changes on
> >> top of Hugh's and Christoph's patches, so I'm the one sending the
> >> pull request.
> >>
> >> The following changes since commit f71077a4d84bbe8c7b91b7db7c4ef815755ac5e3:
> >>
> >>   Merge tag 'mmc-v5.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc (2022-02-16 12:09:22 -0800)
> >>
> >> are available in the Git repository at:
> >>
> >>   git://git.infradead.org/users/willy/pagecache.git tags/folio-5.18
> >>
> >> for you to fetch changes up to 5063f22c914e3e5f2239cf91f4986042dc705bde:
> >>
> >>   mm/damon: minor cleanup for damon_pa_young (2022-03-16 10:09:50 -0400)
> >>
> >> ----------------------------------------------------------------
> >> Folio changes for 5.18
> >>
> >> Several of us had overlapping, conflicting changes to the MM this
> >> round, and I volunteered to send the pull request.
> >>
> >>  - Hugh rewrote how munlock works to massively reduce the contention
> >>    on i_mmap_rwsem:
> >>    https://lore.kernel.org/linux-mm/8e4356d-9622-a7f0-b2c-f116b5f2efea@google.com/
> >>  - Christoph sorted out the page refcount mess for ZONE_DEVICE pages:
> >>    https://lore.kernel.org/linux-mm/20220210072828.2930359-1-hch@lst.de/
> >>  - I converted GUP to use folios and make pincount available for order-1
> >>    pages.
> >>  - I converted a few more truncation functions to use folios
> >>  - I converted page_vma_mapped_walk to use PFNs instead of pages
> >>  - I converted rmap_walk to use folios
> >>  - I converted most of shrink_page_list() to use a folio
> >>  - I added support for creating large folios in readahead
> >>
> >> ----------------------------------------------------------------
> >> Alex Sierra (10):
> >>       mm: add zone device coherent type memory support
> >>       mm: add device coherent vma selection for memory migration
> >>       mm/gup: fail get_user_pages for LONGTERM dev coherent type
> >>       drm/amdkfd: add SPM support for SVM
> >>       drm/amdkfd: coherent type as sys mem on migration to ram
> >>       lib: test_hmm add ioctl to get zone device type
> >>       lib: test_hmm add module param for zone device type
> >>       lib: add support for device coherent type in test_hmm
> >>       tools: update hmm-test to support device coherent type
> >>       tools: update test_hmm script to support SP config
> >>
> >> Alistair Popple (2):
> >>       mm: remove the vma check in migrate_vma_setup()
> >>       mm/gup: migrate device coherent pages when pinning instead of failing
> > 
> > ... I thought DEVICE_COHERENT is still under development?
> > 
> 
> After verifying that I'm not daydreaming [1] (and realizing that I had
> review comments to some of these patches that have not been resolved
> yet) and also not spotting these change in your changelog above, I
> assume this stuff was included by mistake. NACK to merging
> DEVICE_COHERENT at this point.
> 
> [1] https://lkml.kernel.org/r/20220310172633.9151-1-alex.sierra@amd.com

That patch ("split vm_normal_pages for LRU and non-LRU handling") isn't
included in this pull request.  The patches I have were those sent by
Christoph here:

https://lore.kernel.org/linux-mm/20220210072828.2930359-1-hch@lst.de/

I can drop any patches that you have objections to, but I don't see
any objections from you to any patches in that list.