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authorKefeng Wang <wangkefeng.wang@huawei.com>2023-10-18 17:08:05 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-10-26 02:47:13 +0300
commitc2c3b5148052cef670d359b81d338d20b96bf47f (patch)
tree715ec612f4cbe64219eac01ab49a0832e55addfb /mm/memory.c
parenta86bc96b77df40c27ead5ef4ac3837904b7eb53f (diff)
downloadlinux-c2c3b5148052cef670d359b81d338d20b96bf47f.tar.xz
mm: use folio_xchg_last_cpupid() in wp_page_reuse()
Convert to use folio_xchg_last_cpupid() in wp_page_reuse(), and remove page variable. Since now only normal and PMD-mapped page is handled by numa balancing, it's enough to only update the entire folio's last cpupid. Link: https://lkml.kernel.org/r/20231018140806.2783514-19-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: David Hildenbrand <david@redhat.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
-rw-r--r--mm/memory.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 94791c5e2951..1f18ed4a5497 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3019,19 +3019,20 @@ static inline void wp_page_reuse(struct vm_fault *vmf, struct folio *folio)
__releases(vmf->ptl)
{
struct vm_area_struct *vma = vmf->vma;
- struct page *page = vmf->page;
pte_t entry;
VM_BUG_ON(!(vmf->flags & FAULT_FLAG_WRITE));
- VM_BUG_ON(folio && folio_test_anon(folio) && !PageAnonExclusive(page));
- /*
- * Clear the pages cpupid information as the existing
- * information potentially belongs to a now completely
- * unrelated process.
- */
- if (page)
- page_cpupid_xchg_last(page, (1 << LAST_CPUPID_SHIFT) - 1);
+ if (folio) {
+ VM_BUG_ON(folio_test_anon(folio) &&
+ !PageAnonExclusive(vmf->page));
+ /*
+ * Clear the folio's cpupid information as the existing
+ * information potentially belongs to a now completely
+ * unrelated process.
+ */
+ folio_xchg_last_cpupid(folio, (1 << LAST_CPUPID_SHIFT) - 1);
+ }
flush_cache_page(vma, vmf->address, pte_pfn(vmf->orig_pte));
entry = pte_mkyoung(vmf->orig_pte);