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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-08-16 16:11:52 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-21 14:28:43 -0700 |
| commit | 8dc4a8f1e038189cb575f89bcd23364698b88cc1 (patch) | |
| tree | 000cc2ba54fe80c8b41ba25dc5791f55d338a137 /mm/page_alloc.c | |
| parent | 454a00c40a21c59e99c526fe8cc57bd029cf8f0e (diff) | |
| download | linux-8dc4a8f1e038189cb575f89bcd23364698b88cc1.tar.gz linux-8dc4a8f1e038189cb575f89bcd23364698b88cc1.tar.bz2 linux-8dc4a8f1e038189cb575f89bcd23364698b88cc1.zip | |
mm: convert free_transhuge_folio() to folio_undo_large_rmappable()
Indirect calls are expensive, thanks to Spectre. Test for
TRANSHUGE_PAGE_DTOR and destroy the folio appropriately. Move the
free_compound_page() call into destroy_large_folio() to simplify later
patches.
Link: https://lkml.kernel.org/r/20230816151201.3655946-5-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 30dc444436cc..4047b5897443 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -287,9 +287,6 @@ const char * const migratetype_names[MIGRATE_TYPES] = { static compound_page_dtor * const compound_page_dtors[NR_COMPOUND_DTORS] = { [NULL_COMPOUND_DTOR] = NULL, [COMPOUND_PAGE_DTOR] = free_compound_page, -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - [TRANSHUGE_PAGE_DTOR] = free_transhuge_page, -#endif }; int min_free_kbytes = 1024; @@ -614,6 +611,12 @@ void destroy_large_folio(struct folio *folio) return; } + if (folio_test_transhuge(folio) && dtor == TRANSHUGE_PAGE_DTOR) { + folio_undo_large_rmappable(folio); + free_compound_page(&folio->page); + return; + } + VM_BUG_ON_FOLIO(dtor >= NR_COMPOUND_DTORS, folio); compound_page_dtors[dtor](&folio->page); } |