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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2013-04-29 15:08:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 15:54:39 -0700 |
| commit | 5918d10a4bb1081920a04e2c17197a02ff06e651 (patch) | |
| tree | c3e0e45e9eba854bf58d11d43ff9ab4d8ff66893 /mm/page_io.c | |
| parent | fd0ccaf2bd04e54d2a6979fbfdcad856694e3877 (diff) | |
| download | linux-stable-5918d10a4bb1081920a04e2c17197a02ff06e651.tar.gz linux-stable-5918d10a4bb1081920a04e2c17197a02ff06e651.tar.bz2 linux-stable-5918d10a4bb1081920a04e2c17197a02ff06e651.zip | |
thp: fix huge zero page logic for page with pfn == 0
Current implementation of huge zero page uses pfn value 0 to indicate
that the page hasn't allocated yet. It assumes that buddy page
allocator can't return page with pfn == 0.
Let's rework the code to store 'struct page *' of huge zero page, not
its pfn. This way we can avoid the weak assumption.
[akpm@linux-foundation.org: fix sparse warning]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Minchan Kim <minchan@kernel.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_io.c')
0 files changed, 0 insertions, 0 deletions