forked from luck/tmp_suning_uos_patched
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>
This commit is contained in:
parent
eefaca9c32
commit
5577bd8a85
28
mm/slub.c
28
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;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
Loading…
Reference in New Issue
Block a user