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| author | Baolin Wang <baolin.wang@linux.alibaba.com> | 2024-08-12 09:42:02 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-04 06:15:33 +0200 |
| commit | 650180760be6bb448609d4d155eef3b728ace641 (patch) | |
| tree | 3b8e95a09c568724f52c614b9adb54a428394706 /mm/swapfile.c | |
| parent | mm: attempt to batch free swap entries for zap_pte_range() (diff) | |
| download | linux-650180760be6bb448609d4d155eef3b728ace641.tar.xz linux-650180760be6bb448609d4d155eef3b728ace641.zip | |
mm: swap: extend swap_shmem_alloc() to support batch SWAP_MAP_SHMEM flag setting
Patch series "support large folio swap-out and swap-in for shmem", v5.
Shmem will support large folio allocation [1] [2] to get a better
performance, however, the memory reclaim still splits the precious large
folios when trying to swap-out shmem, which may lead to the memory
fragmentation issue and can not take advantage of the large folio for
shmeme.
Moreover, the swap code already supports for swapping out large folio
without split, and large folio swap-in[3] series is queued into
mm-unstable branch. Hence this patch set also supports the large folio
swap-out and swap-in for shmem.
This patch (of 9):
To support shmem large folio swap operations, add a new parameter to
swap_shmem_alloc() that allows batch SWAP_MAP_SHMEM flag setting for shmem
swap entries.
While we are at it, using folio_nr_pages() to get the number of pages of
the folio as a preparation.
Link: https://lkml.kernel.org/r/cover.1723434324.git.baolin.wang@linux.alibaba.com
Link: https://lkml.kernel.org/r/99f64115d04b285e009580eb177352c57119ffd0.1723434324.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Daniel Gomez <da.gomez@samsung.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Lance Yang <ioworker0@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 5e7cbdaf725d..8ff58be40544 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -3657,9 +3657,9 @@ unlock_out: * Help swapoff by noting that swap entry belongs to shmem/tmpfs * (in which case its reference count is never incremented). */ -void swap_shmem_alloc(swp_entry_t entry) +void swap_shmem_alloc(swp_entry_t entry, int nr) { - __swap_duplicate(entry, SWAP_MAP_SHMEM, 1); + __swap_duplicate(entry, SWAP_MAP_SHMEM, nr); } /* |