[PATCH v3 12/15] mm/pte_ref: update the pmd entry in move_normal_pmd()
From: Qi Zheng <hidden>
Date: 2021-11-10 10:56:00
Also in:
linux-mm, lkml
Subsystem:
memory management, memory mapping, the rest · Maintainers:
Andrew Morton, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
The ->pmd member record the pmd entry that maps the user PTE page table page. When the pmd entry changes, ->pmd needs to be updated synchronously. Signed-off-by: Qi Zheng <redacted> --- mm/mremap.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/mm/mremap.c b/mm/mremap.c
index 088a7a75cb4b..4661cdec79dc 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c@@ -278,6 +278,7 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr, VM_BUG_ON(!pmd_none(*new_pmd)); pmd_populate(mm, new_pmd, pmd_pgtable(pmd)); + pte_update_pmd(pmd, new_pmd); flush_tlb_range(vma, old_addr, old_addr + PMD_SIZE); if (new_ptl != old_ptl) spin_unlock(new_ptl);
--
2.11.0