diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-02-27 22:23:31 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-03-07 00:04:18 +0300 |
| commit | fae7d834c43ccdb9fcecaf4d0f33145d884b3e5c (patch) | |
| tree | dea65dd075e12db5aa284c2283b993701abd3045 /include | |
| parent | 7da8988c7c0e28dad8d0e9a697d6e7baa66f4534 (diff) | |
| download | linux-fae7d834c43ccdb9fcecaf4d0f33145d884b3e5c.tar.xz | |
mm: add __dump_folio()
Turn __dump_page() into a wrapper around __dump_folio(). Snapshot the
page & folio into a stack variable so we don't hit BUG_ON() if an
allocation is freed under us and what was a folio pointer becomes a
pointer to a tail page.
[willy@infradead.org: fix build issue]
Link: https://lkml.kernel.org/r/ZeAKCyTn_xS3O9cE@casper.infradead.org
[willy@infradead.org: fix __dump_folio]
Link: https://lkml.kernel.org/r/ZeJJegP8zM7S9GTy@casper.infradead.org
[willy@infradead.org: fix pointer confusion]
Link: https://lkml.kernel.org/r/ZeYa00ixxC4k1ot-@casper.infradead.org
[akpm@linux-foundation.org: s/printk/pr_warn/]
Link: https://lkml.kernel.org/r/20240227192337.757313-5-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 7 | ||||
| -rw-r--r-- | include/linux/mmzone.h | 3 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index d45eadc440f5..02547c8adda0 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2066,6 +2066,13 @@ static inline long folio_nr_pages(struct folio *folio) #endif } +/* Only hugetlbfs can allocate folios larger than MAX_ORDER */ +#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE +#define MAX_FOLIO_NR_PAGES (1UL << PUD_ORDER) +#else +#define MAX_FOLIO_NR_PAGES MAX_ORDER_NR_PAGES +#endif + /* * compound_nr() returns the number of pages in this potentially compound * page. compound_nr() can be called on a tail page, and is defined to diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 633812a1d220..c11b7cde81ef 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -76,9 +76,12 @@ extern const char * const migratetype_names[MIGRATE_TYPES]; #ifdef CONFIG_CMA # define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA) # define is_migrate_cma_page(_page) (get_pageblock_migratetype(_page) == MIGRATE_CMA) +# define is_migrate_cma_folio(folio, pfn) (MIGRATE_CMA == \ + get_pfnblock_flags_mask(&folio->page, pfn, MIGRATETYPE_MASK)) #else # define is_migrate_cma(migratetype) false # define is_migrate_cma_page(_page) false +# define is_migrate_cma_folio(folio, pfn) false #endif static inline bool is_migrate_movable(int mt) |