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From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-mm@kvack.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	linux-fsdevel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Hugh Dickins <hughd@google.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Yang Shi <yang.shi@linux.alibaba.com>,
	Dave Chinner <dchinner@redhat.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 00/12] Overhaul multi-page lookups for THP
Date: Mon, 26 Oct 2020 04:13:56 +0000
Message-ID: <20201026041408.25230-1-willy@infradead.org> (raw)

This THP prep patchset changes several page cache iteration APIs to only
return head pages.

 - It's only possible to tag head pages in the page cache, so only
   return head pages, not all their subpages.
 - Factor a lot of common code out of the various batch lookup routines
 - Add mapping_seek_hole_data()
 - Unify find_get_entries() and pagevec_lookup_entries()
 - Make find_get_entries only return head pages, like find_get_entry().

These are only loosely connected, but they seem to make sense together
as a series.  Another ~30 MM patches to come after this batch to
enable THPs for filesystems.

Matthew Wilcox (Oracle) (12):
  mm: Make pagecache tagged lookups return only head pages
  mm/shmem: Use pagevec_lookup in shmem_unlock_mapping
  mm/filemap: Add helper for finding pages
  mm/filemap: Add mapping_seek_hole_data
  mm: Add and use find_lock_entries
  mm: Add an 'end' parameter to find_get_entries
  mm: Add an 'end' parameter to pagevec_lookup_entries
  mm: Remove nr_entries parameter from pagevec_lookup_entries
  mm: Pass pvec directly to find_get_entries
  mm: Remove pagevec_lookup_entries
  mm/truncate,shmem: Handle truncates that split THPs
  mm/filemap: Return only head pages from find_get_entries

 include/linux/pagemap.h |   5 +-
 include/linux/pagevec.h |   4 -
 mm/filemap.c            | 275 +++++++++++++++++++++++++++-------------
 mm/internal.h           |   5 +
 mm/shmem.c              | 213 +++++++------------------------
 mm/swap.c               |  38 +-----
 mm/truncate.c           | 249 ++++++++++++++----------------------
 7 files changed, 335 insertions(+), 454 deletions(-)

-- 
2.28.0


             reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-26  4:13 Matthew Wilcox (Oracle) [this message]
2020-10-26  4:13 ` [PATCH v3 01/12] mm: Make pagecache tagged lookups return only head pages Matthew Wilcox (Oracle)
2020-10-28  7:50   ` Mike Rapoport
2020-11-12 17:41     ` Matthew Wilcox
2020-11-12 19:11       ` Mike Rapoport
2020-10-26  4:13 ` [PATCH v3 02/12] mm/shmem: Use pagevec_lookup in shmem_unlock_mapping Matthew Wilcox (Oracle)
2020-10-26  4:13 ` [PATCH v3 03/12] mm/filemap: Add helper for finding pages Matthew Wilcox (Oracle)
2020-10-27 18:56   ` Christoph Hellwig
2020-11-12 14:25     ` Matthew Wilcox
2020-10-26  4:14 ` [PATCH v3 04/12] mm/filemap: Add mapping_seek_hole_data Matthew Wilcox (Oracle)
2020-10-26 10:48   ` Jan Kara
2020-10-26 12:17     ` Matthew Wilcox
2020-10-26 14:49       ` Jan Kara
2020-10-27 18:58   ` Christoph Hellwig
2020-10-27 20:04     ` Matthew Wilcox
2020-10-28  6:40       ` Christoph Hellwig
2020-10-26  4:14 ` [PATCH v3 05/12] mm: Add and use find_lock_entries Matthew Wilcox (Oracle)
2020-10-26  4:14 ` [PATCH v3 06/12] mm: Add an 'end' parameter to find_get_entries Matthew Wilcox (Oracle)
2020-10-26  4:14 ` [PATCH v3 07/12] mm: Add an 'end' parameter to pagevec_lookup_entries Matthew Wilcox (Oracle)
2020-10-26  4:14 ` [PATCH v3 08/12] mm: Remove nr_entries parameter from pagevec_lookup_entries Matthew Wilcox (Oracle)
2020-10-26  4:14 ` [PATCH v3 09/12] mm: Pass pvec directly to find_get_entries Matthew Wilcox (Oracle)
2020-10-26  4:14 ` [PATCH v3 10/12] mm: Remove pagevec_lookup_entries Matthew Wilcox (Oracle)
2020-10-26  4:14 ` [PATCH v3 11/12] mm/truncate,shmem: Handle truncates that split THPs Matthew Wilcox (Oracle)
2020-10-26 11:05   ` Jan Kara
2020-10-26  4:14 ` [PATCH v3 12/12] mm/filemap: Return only head pages from find_get_entries Matthew Wilcox (Oracle)

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