From: Sergei Trofimovich <slyfox@gentoo.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
Sergei Trofimovich <slyfox@gentoo.org>,
linux-mm@kvack.org
Subject: [PATCH] mm: page_owner: fetch backtrace only for tracked pages
Date: Thu, 1 Apr 2021 22:24:45 +0100 [thread overview]
Message-ID: <20210401212445.3534721-1-slyfox@gentoo.org> (raw)
Very minor optimization.
CC: Andrew Morton <akpm@linux-foundation.org>
CC: linux-mm@kvack.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
---
mm/page_owner.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/page_owner.c b/mm/page_owner.c
index 63e4ecaba97b..7147fd34a948 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -140,14 +140,14 @@ void __reset_page_owner(struct page *page, unsigned int order)
{
int i;
struct page_ext *page_ext;
- depot_stack_handle_t handle = 0;
+ depot_stack_handle_t handle;
struct page_owner *page_owner;
- handle = save_stack(GFP_NOWAIT | __GFP_NOWARN);
-
page_ext = lookup_page_ext(page);
if (unlikely(!page_ext))
return;
+
+ handle = save_stack(GFP_NOWAIT | __GFP_NOWARN);
for (i = 0; i < (1 << order); i++) {
__clear_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags);
page_owner = get_page_owner(page_ext);
--
2.31.1
next reply other threads:[~2021-04-01 21:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 21:24 Sergei Trofimovich [this message]
2021-04-07 15:49 ` [PATCH] mm: page_owner: fetch backtrace only for tracked pages Vlastimil Babka
2021-04-07 22:47 ` Sergei Trofimovich
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