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| author |   Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2013-12-20 13:35:58 +0200 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-12-20 12:25:45 -0800 |
| commit | 597d795a2a786d22dd872332428e2b9439ede639 (patch) | |
| tree | 1dd7be7e737649c7d346c695e0700c9732b2d681 /init | |
| parent | mm: page_alloc: revert NUMA aspect of fair allocation policy (diff) | |
| download | linux-dev-597d795a2a786d22dd872332428e2b9439ede639.tar.xz linux-dev-597d795a2a786d22dd872332428e2b9439ede639.zip | |
mm: do not allocate page->ptl dynamically, if spinlock_t fits to long
In struct page we have enough space to fit long-size page->ptl there,
but we use dynamically-allocated page->ptl if size(spinlock_t) is larger
than sizeof(int).
It hurts 64-bit architectures with CONFIG_GENERIC_LOCKBREAK, where
sizeof(spinlock_t) == 8, but it easily fits into struct page.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions