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Groups > linux.kernel > #1331687
| From | js1304@gmail.com |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 2/5] mm/slub: query dynamic DEBUG_PAGEALLOC setting |
| Date | 2016-02-11 05:10 +0100 |
| Message-ID | <r0QJQ-3vQ-11@gated-at.bofh.it> (permalink) |
| References | <r0QJP-3vQ-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
We can disable debug_pagealloc processing even if the code is compiled
with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query
whether it is enabled or not in runtime.
v2: clean up code, per Christian.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
mm/slub.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index 606488b..a1874c2 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -250,11 +250,10 @@ static inline void *get_freepointer_safe(struct kmem_cache *s, void *object)
{
void *p;
-#ifdef CONFIG_DEBUG_PAGEALLOC
+ if (!debug_pagealloc_enabled())
+ return get_freepointer(s, object);
+
probe_kernel_read(&p, (void **)(object + s->offset), sizeof(p));
-#else
- p = get_freepointer(s, object);
-#endif
return p;
}
--
1.9.1
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[PATCH v2 0/5] follow-up "Optimize CONFIG_DEBUG_PAGEALLOC" js1304@gmail.com - 2016-02-11 05:10 +0100
[PATCH v2 3/5] sound: query dynamic DEBUG_PAGEALLOC setting js1304@gmail.com - 2016-02-11 05:10 +0100
[PATCH v2 2/5] mm/slub: query dynamic DEBUG_PAGEALLOC setting js1304@gmail.com - 2016-02-11 05:10 +0100
Re: [PATCH v2 2/5] mm/slub: query dynamic DEBUG_PAGEALLOC setting Christian Borntraeger <borntraeger@de.ibm.com> - 2016-02-11 13:30 +0100
[PATCH v2 4/5] powerpc: query dynamic DEBUG_PAGEALLOC setting js1304@gmail.com - 2016-02-11 05:10 +0100
[PATCH v2 5/5] tile: query dynamic DEBUG_PAGEALLOC setting js1304@gmail.com - 2016-02-11 05:10 +0100
[PATCH v2 1/5] mm/vmalloc: query dynamic DEBUG_PAGEALLOC setting js1304@gmail.com - 2016-02-11 05:10 +0100
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