Messages in this thread Patch in this message | | | From | "Huang, Ying" <> | Subject | [PATCH -mm] mm, madvise, THP: Use THP aligned address in madvise_free_huge_pmd() | Date | Thu, 15 Mar 2018 09:18:40 +0800 |
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From: Huang Ying <ying.huang@intel.com>
The address argument passed in madvise_free_huge_pmd() may be not THP aligned. But some THP operations like pmdp_invalidate(), set_pmd_at(), and tlb_remove_pmd_tlb_entry() need the address to be THP aligned. Fix this via using THP aligned address for these functions in madvise_free_huge_pmd().
Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Shaohua Li <shli@kernel.org> Cc: Zi Yan <zi.yan@cs.rutgers.edu> Cc: jglisse@redhat.com Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> --- mm/huge_memory.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 0cc62405de9c..c5e1bfb08bd7 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1617,6 +1617,7 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, struct page *page; struct mm_struct *mm = tlb->mm; bool ret = false; + unsigned long haddr = addr & HPAGE_PMD_MASK; tlb_remove_check_page_size_change(tlb, HPAGE_PMD_SIZE); @@ -1663,12 +1664,12 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, unlock_page(page); if (pmd_young(orig_pmd) || pmd_dirty(orig_pmd)) { - pmdp_invalidate(vma, addr, pmd); + pmdp_invalidate(vma, haddr, pmd); orig_pmd = pmd_mkold(orig_pmd); orig_pmd = pmd_mkclean(orig_pmd); - set_pmd_at(mm, addr, pmd, orig_pmd); - tlb_remove_pmd_tlb_entry(tlb, pmd, addr); + set_pmd_at(mm, haddr, pmd, orig_pmd); + tlb_remove_pmd_tlb_entry(tlb, pmd, haddr); } mark_page_lazyfree(page); -- 2.16.1
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