Messages in this thread | | | From | Toshi Kani <> | Subject | [PATCH 0/2] Change PAT to support mremap use-cases | Date | Wed, 9 Dec 2015 09:26:06 -0700 |
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This patch-set fixes issues found in the pfn tracking code of PAT when mremap() is used on a VM_PFNMAP range.
Patch 1/2 changes untrack_pfn() to handle the case of mremap() with MREMAP_FIXED, i.e. remapping virtual address on a VM_PFNMAP range.
Patch 2/2 changes the free_memtype() path to handle the case of mremap() that shrinks the size of a VM_PFNMAP range.
Note, mremap() to expand the size of a VM_PFNMAP range is not a valid case as VM_DONTEXPAND is set along with VM_PFNMAP.
--- Toshi Kani (2): 1/2 x86/mm/pat: Change untrack_pfn() to handle unmapped vma 2/2 x86/mm/pat: Change free_memtype() to free shrinking range
--- arch/x86/mm/pat.c | 19 ++++++++++++------- arch/x86/mm/pat_rbtree.c | 46 +++++++++++++++++++++++++++++++++++++--------- 2 files changed, 49 insertions(+), 16 deletions(-)
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