linux-kernel - Re: linux-next: please clean up the folio tree

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Date:   Sun, 1 Jan 2023 15:33:30 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: please clean up the folio tree

Hi Willy,

On Thu, 15 Dec 2022 10:55:39 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> The folio tree seems to contain a number of commits that duplicate
> commits in Linus' tree.

I fact, all but the first commit in the folio tree were merged by Linus
in v6.0-rc1.  And the folio tree has not bee updates since mid June ...

$ git cherry -v v6.0-rc1 folio/for-next
+ 964688b32d9ada55a7fce2e650d85ef24188f73f btrfs: Use a folio in wait_dev_supers()
- ba457436991abc8e3cc830cfc91e9f54b53a07ed buffer: Don't test folio error in block_read_full_folio()
- 2c62b172802a648cb9bad9b1ad2415a8ecbb7f41 squashfs: Return the actual error from squashfs_read_folio()
- 4188e3e2860d65a43397d4658f74136bf3297808 hostfs: Handle page write errors correctly
- 437084d7c5b825e714d0b50ba6624e6ba840fa32 ocfs2: Use filemap_write_and_wait_range() in ocfs2_cow_sync_writeback()
- 0ba02b002594cc1809da3a05a44bb5b9654448f6 cramfs: read_mapping_page() is synchronous
- 1cf29f882fa8e28e18cccc9b0a7e94e391b3291f block: Simplify read_part_sector()
- a340b79b299109ded6928157dc24cf0fb6a90823 block: Handle partition read errors more consistently
- 4639d0da923efd6704974893ba19eb1aaf396538 block: Use PAGE_SECTORS_SHIFT
- 5b15f72a828b44a06d50ab739e89ac492298bec4 block: Convert read_part_sector() to use a folio
- fa19fbd23186e43714bf7694ec83b7a519e618c0 befs: Convert befs_symlink_read_folio() to use a folio
- 1a6b7e5cb5504bf4f0f4e63b8bedaff8aad5798b coda: Convert coda_symlink_filler() to use a folio
- 6e2a48222bc97d4028b1ff8b8bfdfadec7a72923 freevxfs: Convert vxfs_immed_read_folio() to use a folio
- 71864cbf4617f06ff2434235049e9c3daa2806a6 ocfs2: Convert ocfs2_read_folio() to use a folio
- d862e2d593685f8a895202493f1a059932cdb0e0 gfs2: Convert gfs2_jhead_process_page() to use a folio
- 1662afcecae535147b1cb143fde8d99a6a98d8fe ext2: Use a folio in ext2_get_page()
- 1a22e12f94c9f647cdd8e4e56bc313043e9eb5c2 secretmem: Remove isolate_page
- b361f39863ed2d6ca644a2d53638c3fd87d32d14 mm: Convert all PageMovable users to movable_operations
- 662389777689c17a77849af822bac1677be56e37 fs: Add aops->migrate_folio
- 765acf9085a1188244ec6294e3039637685c209e mm/migrate: Convert fallback_migrate_page() to fallback_migrate_folio()
- 7d474706ff4fb035f896710fa1274e3050afb461 mm/migrate: Convert writeout() to take a folio
- e267a3198014ec93389b1930b776047082bb271f mm/migrate: Convert buffer_migrate_page() to buffer_migrate_folio()
- 55553f3437c8b185b71fe4bd8106141a4e4192de mm/migrate: Convert expected_page_refs() to folio_expected_refs()
- e8172b8e1728b41160dc8fef7fdd9ffbcaa152c6 btrfs: Convert btree_migratepage to migrate_folio
- 27826326e888a185d7d191670cf445dec88e9218 nfs: Convert to migrate_folio
- af9c33968b722c5871974541067dc180377501df mm/migrate: Convert migrate_page() to migrate_folio()
- 441b3afcb2e31aca89f6e2cd6642f141c7bbe142 mm/migrate: Add filemap_migrate_folio()
- 9c5161d1eefb24389a077b43e8e11322f2e4cd42 btrfs: Convert btrfs_migratepage to migrate_folio
- 9f11d68b27211e6a73b0540dc757c91c01ae74bf ubifs: Convert to filemap_migrate_folio()
- 9c16c4c68213afc512aadb854c9603f4eff6b977 f2fs: Convert to filemap_migrate_folio()
- 9b553d25025600ecaeb903b9250279b50c1c6054 aio: Convert to migrate_folio
- 5567427fd70edcd4809a5b1df03f363e72f997bf hugetlb: Convert to migrate_folio
- 48e7ede1b860e44edfd0231f888a7f16af86d6a0 secretmem: Convert to migrate_folio
- c33b866a97842ac96f4373f737ba608dd157f08a fs: Remove aops->migratepage()
- 84578adbb0e0657003e646e0af699ef74b99386e mm/folio-compat: Remove migration compatibility functions
- 9594da4cec1db0491d35b38d5988eb989720d6f4 ntfs3: refactor ntfs_writepages
- 8862fa5da9f144d0554c2177aea7ce0b6f97d8c0 ext2: remove nobh support
- 3f05372ce9ddbd643a763f60c0d2a115cb2de008 jfs: stop using the nobh helper
- 215e71b6ee7ad3363c6e6bd979adbb56e070f6de fs: remove the nobh helpers
- cf95d50205f62c4f5f538676def847292cf39fa9 fs: don't call ->writepage from __mpage_writepage
- 03b33c09ea22fa89dd204ad0a2058e512c691b9f fs: remove the NULL get_block case in mpage_writepages

And the presence of these commits in the folio tree produces the
following output when I merge it:

Auto-merging Documentation/filesystems/locking.rst
Auto-merging Documentation/filesystems/vfs.rst
Auto-merging block/fops.c
Auto-merging block/partitions/core.c
Auto-merging drivers/gpu/drm/i915/gem/i915_gem_userptr.c
Auto-merging drivers/misc/vmw_balloon.c
Auto-merging drivers/virtio/virtio_balloon.c
Auto-merging fs/aio.c
Auto-merging fs/btrfs/disk-io.c
Auto-merging fs/btrfs/inode.c
Auto-merging fs/buffer.c
Auto-merging fs/ext2/dir.c
Auto-merging fs/ext2/inode.c
Auto-merging fs/ext2/namei.c
Auto-merging fs/ext2/super.c
Auto-merging fs/ext4/inode.c
Auto-merging fs/f2fs/checkpoint.c
Auto-merging fs/f2fs/data.c
Auto-merging fs/f2fs/f2fs.h
Auto-merging fs/f2fs/node.c
Auto-merging fs/gfs2/aops.c
Auto-merging fs/gfs2/lops.c
Auto-merging fs/hostfs/hostfs_kern.c
Auto-merging fs/hugetlbfs/inode.c
CONFLICT (content): Merge conflict in fs/hugetlbfs/inode.c
Auto-merging fs/iomap/buffered-io.c
Auto-merging fs/jfs/inode.c
Auto-merging fs/mpage.c
Auto-merging fs/nfs/file.c
Auto-merging fs/nfs/internal.h
Auto-merging fs/nfs/write.c
Auto-merging fs/ntfs/aops.c
Auto-merging fs/ntfs3/inode.c
Auto-merging fs/ocfs2/aops.c
Auto-merging fs/ocfs2/refcounttree.c
Auto-merging fs/squashfs/file.c
Auto-merging fs/ubifs/file.c
Auto-merging fs/xfs/xfs_aops.c
Auto-merging fs/zonefs/super.c
Auto-merging include/linux/buffer_head.h
Auto-merging include/linux/fs.h
Auto-merging include/linux/iomap.h
Auto-merging include/linux/migrate.h
CONFLICT (content): Merge conflict in include/linux/migrate.h
Auto-merging include/linux/page-flags.h
Auto-merging include/linux/pagemap.h
Auto-merging mm/compaction.c
Auto-merging mm/folio-compat.c
Auto-merging mm/ksm.c
Auto-merging mm/migrate.c
CONFLICT (content): Merge conflict in mm/migrate.c
Auto-merging mm/migrate_device.c
CONFLICT (content): Merge conflict in mm/migrate_device.c
Auto-merging mm/secretmem.c
Auto-merging mm/shmem.c
Auto-merging mm/swap_state.c
Auto-merging mm/util.c
Auto-merging mm/z3fold.c
Auto-merging mm/zsmalloc.c
CONFLICT (content): Merge conflict in mm/zsmalloc.c
Resolved 'fs/hugetlbfs/inode.c' using previous resolution.
Resolved 'include/linux/migrate.h' using previous resolution.
Resolved 'mm/migrate.c' using previous resolution.
Resolved 'mm/migrate_device.c' using previous resolution.
Resolved 'mm/zsmalloc.c' using previous resolution.
Automatic merge failed; fix conflicts and then commit the result.
$ git commit --no-edit -v -a
[master 5d9bea6f818b] Merge branch 'for-next' of git://git.infradead.org/users/willy/pagecache.git
$ git diff -M --stat --summary HEAD^..
 fs/btrfs/disk-io.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

-- 
Cheers,
Stephen Rothwell

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