diff options
| author | Barry Song <v-songbaohua@oppo.com> | 2024-04-12 23:48:56 +1200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-05 17:53:35 -0700 |
| commit | d0f048ac39f6a71566d3f49a5922dfd7fa0d585b (patch) | |
| tree | 5c9eaf32026d195298f2371757f548b068be9c2d /mm/vmscan.c | |
| parent | ec33687c674934dfefd782a8ffd58370b080b503 (diff) | |
mm: add per-order mTHP anon_swpout and anon_swpout_fallback counters
This helps to display the fragmentation situation of the swapfile, knowing
the proportion of how much we haven't split large folios. So far, we only
support non-split swapout for anon memory, with the possibility of
expanding to shmem in the future. So, we add the "anon" prefix to the
counter names.
Link: https://lkml.kernel.org/r/20240412114858.407208-3-21cnbao@gmail.com
Signed-off-by: Barry Song <v-songbaohua@oppo.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Chris Li <chrisl@kernel.org>
Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Yosry Ahmed <yosryahmed@google.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index da93213af981..d194e7240df4 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1214,6 +1214,8 @@ retry: goto activate_locked; } if (!add_to_swap(folio)) { + int __maybe_unused order = folio_order(folio); + if (!folio_test_large(folio)) goto activate_locked_split; /* Fallback to swap normal pages */ @@ -1225,6 +1227,7 @@ retry: THP_SWPOUT_FALLBACK, 1); count_vm_event(THP_SWPOUT_FALLBACK); } + count_mthp_stat(order, MTHP_STAT_ANON_SWPOUT_FALLBACK); #endif if (!add_to_swap(folio)) goto activate_locked_split; |