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| author | Christoph Lameter <clameter@sgi.com> | 2007-05-16 22:10:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-17 05:23:03 -0700 |
| commit | 5577bd8a85c8b7643a241789b14fafa9c8a6c7db (patch) | |
| tree | 0ef0a8adb6811277df3f6e41a2578b1118bc80ef | |
| parent | eefaca9c3246f3daf56e7ed02987f79abcee7087 (diff) | |
| download | linux-3.10-5577bd8a85c8b7643a241789b14fafa9c8a6c7db.tar.gz linux-3.10-5577bd8a85c8b7643a241789b14fafa9c8a6c7db.tar.bz2 linux-3.10-5577bd8a85c8b7643a241789b14fafa9c8a6c7db.zip | |
SLUB: Do our own flags based on PG_active and PG_error
The atomicity when handling flags in SLUB is not necessary since both flags
used by SLUB are not updated in a racy way. Flag updates are either done
during slab creation or destruction or under slab_lock. Some of these flags
do not have the non atomic variants that we need. So define our own.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/slub.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/mm/slub.c b/mm/slub.c index ce96d485a88..3ca164f3396 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -99,42 +99,42 @@ * the fast path and disables lockless freelists. */ +#define FROZEN (1 << PG_active) + +#ifdef CONFIG_SLUB_DEBUG +#define SLABDEBUG (1 << PG_error) +#else +#define SLABDEBUG 0 +#endif + static inline int SlabFrozen(struct page *page) { - return PageActive(page); + return page->flags & FROZEN; } static inline void SetSlabFrozen(struct page *page) { - SetPageActive(page); + page->flags |= FROZEN; } static inline void ClearSlabFrozen(struct page *page) { - ClearPageActive(page); + page->flags &= ~FROZEN; } static inline int SlabDebug(struct page *page) { -#ifdef CONFIG_SLUB_DEBUG - return PageError(page); -#else - return 0; -#endif + return page->flags & SLABDEBUG; } static inline void SetSlabDebug(struct page *page) { -#ifdef CONFIG_SLUB_DEBUG - SetPageError(page); -#endif + page->flags |= SLABDEBUG; } static inline void ClearSlabDebug(struct page *page) { -#ifdef CONFIG_SLUB_DEBUG - ClearPageError(page); -#endif + page->flags &= ~SLABDEBUG; } /* |