The patch titled
SLUB: Do our own flags based on PG_active and PG_error
has been added to the -mm tree. Its filename is
slub-do-our-own-flags-based-on-pg_active-and-pg_error.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: SLUB: Do our own flags based on PG_active and PG_error
From: Christoph Lameter <clameter@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff -puN mm/slub.c~slub-do-our-own-flags-based-on-pg_active-and-pg_error mm/slub.c
--- a/mm/slub.c~slub-do-our-own-flags-based-on-pg_active-and-pg_error
+++ a/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;
}
/*
_
Patches currently in -mm which might be from clameter@xxxxxxx are
origin.patch
slub-it-is-legit-to-allocate-a-slab-of-the-maximum-permitted-size.patch
slub-dont-confuse-ctor-and-dtor.patch
fix-find_or_create_page-skips-cpuset-memory-spreading.patch
git-ubi.patch
quicklist-support-for-x86_64.patch
slab-allocators-drop-support-for-destructors.patch
remove-slab_ctor_constructor.patch
remove-constructor-from-buffer_head.patch
remove-slab_ctor_constructor-fix.patch
slub-remove-depends-on-experimental-and-arch_uses_slab_page_struct.patch
slab-move-two-remaining-slab-specific-definitions-to-slab_defh.patch
slub-define-functions-for-cpu-slab-handling-instead-of-using.patch
slub-define-functions-for-cpu-slab-handling-instead-of-using-fix.patch
slab-warn-on-zero-length-allocations.patch
i386-dont-check_pgt_cache-in-flush_tlb_mm.patch
slub-fix-handling-of-oversized-slabs.patch
fix-page-allocation-flags-in-grow_dev_page.patch
slub-slabinfo-fixes.patch
slub-do-our-own-flags-based-on-pg_active-and-pg_error.patch
slub-simplify-debug-code.patch
compat_core_sys_select-avoid-kmalloc0.patch
change-zonelist-order-zonelist-order-selection-logic.patch
change-zonelist-order-v6-zonelist-fix.patch
change-zonelist-order-auto-configuration.patch
change-zonelist-order-documentaion.patch
group-short-lived-and-reclaimable-kernel-allocations-use-slab_account_reclaim-to-determine-when-__gfp_reclaimable-should-be-used.patch
group-short-lived-and-reclaimable-kernel-allocations-use-slab_account_reclaim-to-determine-when-__gfp_reclaimable-should-be-used-fix.patch
have-kswapd-keep-a-minimum-order-free-other-than-order-0.patch
have-kswapd-keep-a-minimum-order-free-other-than-order-0-fix.patch
only-check-absolute-watermarks-for-alloc_high-and-alloc_harder-allocations.patch
slub-mm-only-make-slub-the-default-slab-allocator.patch
slub-exploit-page-mobility-to-increase-allocation-order.patch
slub-reduce-antifrag-max-order.patch
slub-reduce-antifrag-max-order-use-antifrag-constant-instead-of-hardcoding-page-order.patch
mm-implement-swap-prefetching.patch
revoke-core-code.patch
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