On Thu, Feb 16, 2023 at 10:07 AM David Howells <dhowells@xxxxxxxxxx> wrote:
>
> Hi Willy,
>
> Is this okay by you? You said you wanted to look at the remaining uses of
> page_has_private(), of which there are then three after these patches, not
> counting folio_has_private():
>
> arch/s390/kernel/uv.c: if (page_has_private(page))
> mm/khugepaged.c: 1 + page_mapcount(page) + page_has_private(page)) {
> mm/migrate_device.c: extra += 1 + page_has_private(page);
>
> --
> I've split the folio_has_private()/filemap_release_folio() call pair
> merging into its own patch, separate from the actual bugfix and pulled out
> the folio_needs_release() function into mm/internal.h and made
> filemap_release_folio() use it. I've also got rid of the bit clearances
> from the network filesystem evict_inode functions as they doesn't seem to
> be necessary.
>
> Note that the last vestiges of try_to_release_page() got swept away, so I
> rebased and dealt with that. One comment remained, which is removed by the
> first patch.
>
> David
>
> Changes:
> ========
> ver #6)
> - Drop the third patch which removes a duplicate check in vmscan().
>
> ver #5)
> - Rebased on linus/master. try_to_release_page() has now been entirely
> replaced by filemap_release_folio(), barring one comment.
> - Cleaned up some pairs in ext4.
>
> ver #4)
> - Split has_private/release call pairs into own patch.
> - Moved folio_needs_release() to mm/internal.h and removed open-coded
> version from filemap_release_folio().
> - Don't need to clear AS_RELEASE_ALWAYS in ->evict_inode().
> - Added experimental patch to reduce shrink_folio_list().
>
> ver #3)
> - Fixed mapping_clear_release_always() to use clear_bit() not set_bit().
> - Moved a '&&' to the correct line.
>
> ver #2)
> - Rewrote entirely according to Willy's suggestion[1].
>
> Link: https://lore.kernel.org/r/Yk9V/03wgdYi65Lb@xxxxxxxxxxxxxxxxxxxx/ [1]
> Link: https://lore.kernel.org/r/164928630577.457102.8519251179327601178.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v1
> Link: https://lore.kernel.org/r/166844174069.1124521.10890506360974169994.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v2
> Link: https://lore.kernel.org/r/166869495238.3720468.4878151409085146764.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v3
> Link: https://lore.kernel.org/r/1459152.1669208550@xxxxxxxxxxxxxxxxxxxxxx/ # v3 also
> Link: https://lore.kernel.org/r/166924370539.1772793.13730698360771821317.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v4
> Link: https://lore.kernel.org/r/167172131368.2334525.8569808925687731937.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v5
> ---
> %(shortlog)s
> %(diffstat)s
>
> David Howells (2):
> mm: Merge folio_has_private()/filemap_release_folio() call pairs
> mm, netfs, fscache: Stop read optimisation when folio removed from
> pagecache
>
> fs/9p/cache.c | 2 ++
> fs/afs/internal.h | 2 ++
> fs/cachefiles/namei.c | 2 ++
> fs/ceph/cache.c | 2 ++
> fs/cifs/fscache.c | 2 ++
> fs/ext4/move_extent.c | 12 ++++--------
> fs/splice.c | 3 +--
> include/linux/pagemap.h | 16 ++++++++++++++++
> mm/filemap.c | 2 ++
> mm/huge_memory.c | 3 +--
> mm/internal.h | 11 +++++++++++
> mm/khugepaged.c | 3 +--
> mm/memory-failure.c | 8 +++-----
> mm/migrate.c | 3 +--
> mm/truncate.c | 6 ++----
> mm/vmscan.c | 8 ++++----
> 16 files changed, 56 insertions(+), 29 deletions(-)
>
> --
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>
Willy, and David,
Can this series move forward?
This just got mentioned again [1] after Chris tested the NFS netfs
patches that were merged in 6.4-rc1
[1] https://lore.kernel.org/linux-nfs/CAAmbk-f_U8CPcTQM866L572uUHdK4p5iWKnUQs4r8fkW=6RW9g@xxxxxxxxxxxxxx/
