The patch titled
Subject: mm/mremap: start addresses are properly aligned
has been added to the -mm tree. Its filename is
mm-mremap-start-addresses-are-properly-aligned.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mremap-start-addresses-are-properly-aligned.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mremap-start-addresses-are-properly-aligned.patch
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------------------------------------------------------
From: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Subject: mm/mremap: start addresses are properly aligned
After previous cleanup, extent is the minimal step for both source and
destination. This means when extent is HPAGE_PMD_SIZE or PMD_SIZE,
old_addr and new_addr are properly aligned too.
Since these two functions are only invoked in move_page_tables, it is safe
to remove the check now.
Link: http://lkml.kernel.org/r/20200117232254.2792-6-richardw.yang@xxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Cc: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Cc: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 3 ---
mm/mremap.c | 3 ---
2 files changed, 6 deletions(-)
--- a/mm/huge_memory.c~mm-mremap-start-addresses-are-properly-aligned
+++ a/mm/huge_memory.c
@@ -1878,9 +1878,6 @@ bool move_huge_pmd(struct vm_area_struct
struct mm_struct *mm = vma->vm_mm;
bool force_flush = false;
- if ((old_addr & ~HPAGE_PMD_MASK) || (new_addr & ~HPAGE_PMD_MASK))
- return false;
-
/*
* The destination pmd shouldn't be established, free_pgtables()
* should have release it.
--- a/mm/mremap.c~mm-mremap-start-addresses-are-properly-aligned
+++ a/mm/mremap.c
@@ -199,9 +199,6 @@ static bool move_normal_pmd(struct vm_ar
struct mm_struct *mm = vma->vm_mm;
pmd_t pmd;
- if ((old_addr & ~PMD_MASK) || (new_addr & ~PMD_MASK))
- return false;
-
/*
* The destination pmd shouldn't be established, free_pgtables()
* should have release it.
_
Patches currently in -mm which might be from richardw.yang@xxxxxxxxxxxxxxx are
mm-thp-remove-the-defer-list-related-code-since-this-will-not-happen.patch
mm-gupc-use-is_vm_hugetlb_page-to-check-whether-to-follow-huge.patch
mm-mremap-format-the-check-in-move_normal_pmd-same-as-move_huge_pmd.patch
mm-mremap-it-is-sure-to-have-enough-space-when-extent-meets-requirement.patch
mm-mremap-use-pmd_addr_end-to-calculate-next-in-move_page_tables.patch
mm-mremap-calculate-extent-in-one-place.patch
mm-mremap-start-addresses-are-properly-aligned.patch
mm-huge_memoryc-use-head-to-check-huge-zero-page.patch
mm-huge_memoryc-use-head-to-emphasize-the-purpose-of-page.patch
mm-huge_memoryc-reduce-critical-section-protected-by-split_queue_lock.patch
mm-remove-dead-code-totalram_pages_set.patch
