From: Vlastimil Babka <vbabka@suse.cz>
To: Andrew Morton <akpm@linux-foundation.org>,
Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kernel-team@android.com, vinmenon@codeaurora.org,
Kees Cook <keescook@chromium.org>,
Matthew Garrett <mjg59@google.com>, Roman Gushchin <guro@fb.com>,
Vlastimil Babka <vbabka@suse.cz>, Jann Horn <jannh@google.com>,
Vijayanand Jitta <vjitta@codeaurora.org>
Subject: [PATCH 8/9] mm, slub: extend checks guarded by slub_debug static key
Date: Wed, 10 Jun 2020 18:31:34 +0200 [thread overview]
Message-ID: <20200610163135.17364-9-vbabka@suse.cz> (raw)
In-Reply-To: <20200610163135.17364-1-vbabka@suse.cz>
There are few more places in SLUB that could benefit from reduced overhead of
the static key introduced by a previous patch:
- setup_object_debug() called on each object in newly allocated slab page
- setup_page_debug() called on newly allocated slab page
- __free_slab() called on freed slab page
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
mm/slub.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index c8e8b4ae2451..efb08f2e9c66 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1130,7 +1130,7 @@ static inline void dec_slabs_node(struct kmem_cache *s, int node, int objects)
static void setup_object_debug(struct kmem_cache *s, struct page *page,
void *object)
{
- if (!(s->flags & (SLAB_STORE_USER|SLAB_RED_ZONE|__OBJECT_POISON)))
+ if (!kmem_cache_debug_flags(s, SLAB_STORE_USER|SLAB_RED_ZONE|__OBJECT_POISON))
return;
init_object(s, object, SLUB_RED_INACTIVE);
@@ -1140,7 +1140,7 @@ static void setup_object_debug(struct kmem_cache *s, struct page *page,
static
void setup_page_debug(struct kmem_cache *s, struct page *page, void *addr)
{
- if (!(s->flags & SLAB_POISON))
+ if (!kmem_cache_debug_flags(s, SLAB_POISON))
return;
metadata_access_enable();
@@ -1857,7 +1857,7 @@ static void __free_slab(struct kmem_cache *s, struct page *page)
int order = compound_order(page);
int pages = 1 << order;
- if (s->flags & SLAB_CONSISTENCY_CHECKS) {
+ if (kmem_cache_debug_flags(s, SLAB_CONSISTENCY_CHECKS)) {
void *p;
slab_pad_check(s, page);
--
2.26.2
next prev parent reply other threads:[~2020-06-10 16:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-10 16:31 [PATCH 0/9] slub_debug fixes and improvements Vlastimil Babka
2020-06-10 16:31 ` [PATCH 1/9] mm, slub: extend slub_debug syntax for multiple blocks Vlastimil Babka
2020-06-10 16:31 ` [PATCH 2/9] mm, slub: make some slub_debug related attributes read-only Vlastimil Babka
2020-06-10 16:31 ` [PATCH 3/9] mm, slub: remove runtime allocation order changes Vlastimil Babka
2020-06-10 16:31 ` [PATCH 4/9] mm, slub: make remaining slub_debug related attributes read-only Vlastimil Babka
2020-06-10 16:31 ` [PATCH 5/9] mm, slub: make reclaim_account attribute read-only Vlastimil Babka
2020-06-10 16:31 ` [PATCH 6/9] mm, slub: introduce static key for slub_debug() Vlastimil Babka
2020-06-10 21:59 ` Roman Gushchin
2020-06-17 17:54 ` Kees Cook
2020-06-10 16:31 ` [PATCH 7/9] mm, slub: introduce kmem_cache_debug_flags() Vlastimil Babka
2020-06-10 22:06 ` Roman Gushchin
2020-06-17 17:56 ` Kees Cook
2020-06-18 8:32 ` Vlastimil Babka
2020-06-18 8:37 ` Vlastimil Babka
2020-06-18 19:54 ` Roman Gushchin
2020-06-18 19:56 ` Kees Cook
2020-06-10 16:31 ` Vlastimil Babka [this message]
2020-06-10 22:09 ` [PATCH 8/9] mm, slub: extend checks guarded by slub_debug static key Roman Gushchin
2020-06-10 16:31 ` [PATCH 9/9] mm, slab/slub: move and improve cache_from_obj() Vlastimil Babka
2020-06-10 22:46 ` Roman Gushchin
2020-06-11 9:56 ` Vlastimil Babka
2020-06-11 20:04 ` Roman Gushchin
2020-06-17 17:49 ` Kees Cook
2020-06-18 10:10 ` Vlastimil Babka
2020-06-18 19:59 ` Kees Cook
2020-06-18 20:05 ` Roman Gushchin
2020-06-19 19:02 ` Kees Cook
2020-06-24 7:57 ` Vlastimil Babka
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