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| author | Sergei Trofimovich <slyfox@gentoo.org> | 2021-04-29 22:55:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-30 11:20:36 -0700 |
| commit | fab765c210130113ede5f8754c6a158fa0e4f960 (patch) | |
| tree | b1eda472024d90ad2f9a8c198a528bf437deb5dd | |
| parent | 64ea78d2fdee1f68983ae3bec23f5d2bce71dc5a (diff) | |
| download | linux-fab765c210130113ede5f8754c6a158fa0e4f960.tar.gz | |
mm: page_owner: fetch backtrace only for tracked pages
Very minor optimization. Link: https://lkml.kernel.org/r/20210401212445.3534721-1-slyfox@gentoo.org Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/page_owner.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c index b29a049b734a..590c2c89af74 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -147,15 +147,15 @@ void __reset_page_owner(struct page *page, unsigned int order) { int i; struct page_ext *page_ext; - depot_stack_handle_t handle = 0; + depot_stack_handle_t handle; struct page_owner *page_owner; u64 free_ts_nsec = local_clock(); - handle = save_stack(GFP_NOWAIT | __GFP_NOWARN); - page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return; + + handle = save_stack(GFP_NOWAIT | __GFP_NOWARN); for (i = 0; i < (1 << order); i++) { __clear_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags); page_owner = get_page_owner(page_ext); |