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Subject[PATCH 1/4] proc: Convert gather_stats to use a folio
Date
Replaces six calls to compound_head() with one.  Shrinks the function
from 5054 bytes to 1756 bytes in an allmodconfig build.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
fs/proc/task_mmu.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index e8d1008a838d..5260a2788f74 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -2549,28 +2549,29 @@ struct numa_maps_private {
static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty,
unsigned long nr_pages)
{
+ struct folio *folio = page_folio(page);
int count = page_mapcount(page);

md->pages += nr_pages;
- if (pte_dirty || PageDirty(page))
+ if (pte_dirty || folio_test_dirty(folio))
md->dirty += nr_pages;

- if (PageSwapCache(page))
+ if (folio_test_swapcache(folio))
md->swapcache += nr_pages;

- if (PageActive(page) || PageUnevictable(page))
+ if (folio_test_active(folio) || folio_test_unevictable(folio))
md->active += nr_pages;

- if (PageWriteback(page))
+ if (folio_test_writeback(folio))
md->writeback += nr_pages;

- if (PageAnon(page))
+ if (folio_test_anon(folio))
md->anon += nr_pages;

if (count > md->mapcount_max)
md->mapcount_max = count;

- md->node[page_to_nid(page)] += nr_pages;
+ md->node[folio_nid(folio)] += nr_pages;
}

static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma,
--
2.43.0

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