diff options
| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-01-13 15:46:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:32:40 -0800 |
| commit | db3eb96f4e6281b84dd33c8980dacc27f2efe177 (patch) | |
| tree | 0746ed213778d8cb9ec18c1c7c16490c233d178b /arch/x86/mm/gup.c | |
| parent | e2cda322648122dc400c85ada80eaddbc612ef6a (diff) | |
thp: add pmd mangling functions to x86
Add needed pmd mangling functions with symmetry with their pte
counterparts. pmdp_splitting_flush() is the only new addition on the pmd_
methods and it's needed to serialize the VM against split_huge_page. It
simply atomically sets the splitting bit in a similar way
pmdp_clear_flush_young atomically clears the accessed bit.
pmdp_splitting_flush() also has to flush the tlb to make it effective
against gup_fast, but it wouldn't really require to flush the tlb too.
Just the tlb flush is the simplest operation we can invoke to serialize
pmdp_splitting_flush() against gup_fast.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/mm/gup.c')
0 files changed, 0 insertions, 0 deletions