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| author | Peter Feiner <[email protected]> | 2014-09-25 23:05:18 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2014-09-26 15:10:35 +0000 |
| commit | 87e6d49a000fa6148bd539f632706b02c3485c5d (patch) | |
| tree | 9d848bb2f91295314dfb423485879cbffb4ad101 /lib/genalloc.c | |
| parent | ocfs2/dlm: do not get resource spinlock if lockres is new (diff) | |
| download | kernel-87e6d49a000fa6148bd539f632706b02c3485c5d.tar.gz kernel-87e6d49a000fa6148bd539f632706b02c3485c5d.zip | |
mm: softdirty: addresses before VMAs in PTE holes aren't softdirty
In PTE holes that contain VM_SOFTDIRTY VMAs, unmapped addresses before
VM_SOFTDIRTY VMAs are reported as softdirty by /proc/pid/pagemap. This
bug was introduced in commit 68b5a6524856 ("mm: softdirty: respect
VM_SOFTDIRTY in PTE holes"). That commit made /proc/pid/pagemap look at
VM_SOFTDIRTY in PTE holes but neglected to observe the start of VMAs
returned by find_vma.
Tested:
Wrote a selftest that creates a PMD-sized VMA then unmaps the first
page and asserts that the page is not softdirty. I'm going to send the
pagemap selftest in a later commit.
Signed-off-by: Peter Feiner <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Jamie Liu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/genalloc.c')
0 files changed, 0 insertions, 0 deletions