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| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2015-02-12 00:27:37 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 02:06:05 +0100 |
| commit | fafaa4264eba49fd10695c193a82760558d093f4 (patch) | |
| tree | 2ba4ceadd17b4b93b3ba52e410af9e3c93312c4c /Kbuild | |
| parent | mm/pagewalk: remove pgd_entry() and pud_entry() (diff) | |
| download | linux-fafaa4264eba49fd10695c193a82760558d093f4.tar.xz linux-fafaa4264eba49fd10695c193a82760558d093f4.zip | |
pagewalk: improve vma handling
Current implementation of page table walker has a fundamental problem in
vma handling, which started when we tried to handle vma(VM_HUGETLB).
Because it's done in pgd loop, considering vma boundary makes code
complicated and bug-prone.
From the users viewpoint, some user checks some vma-related condition to
determine whether the user really does page walk over the vma.
In order to solve these, this patch moves vma check outside pgd loop and
introduce a new callback ->test_walk().
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions