From: Zhaoyang Huang <huangzhaoyang@gmail.com>
To: zhaoyang.huang@spreadtrum.com,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>, Ingo Molnar <mingo@kernel.org>,
zijun_hu <zijun_hu@htc.com>, Vlastimil Babka <vbabka@suse.cz>,
Thomas Garnier <thgarnie@google.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mm/vmalloc: terminate searching since one node found
Date: Sun, 16 Jul 2017 15:28:27 +0800 [thread overview]
Message-ID: <1500190107-2192-1-git-send-email-zhaoyang.huang@spreadtrum.com> (raw)
It is no need to find the very beginning of the area within
alloc_vmap_area, which can be done by judging each node during the process
Signed-off-by: Zhaoyang Huang <zhaoyang.huang@spreadtrum.com>
Signed-off-by: Zhaoyang Huang <huangzhaoyang@gmail.com>
---
mm/vmalloc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 34a1c3e..f833e07 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -459,9 +459,16 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
while (n) {
struct vmap_area *tmp;
+ struct vmap_area *tmp_next;
tmp = rb_entry(n, struct vmap_area, rb_node);
+ tmp_next = list_next_entry(tmp, list);
if (tmp->va_end >= addr) {
first = tmp;
+ if (ALIGN(tmp->va_end, align) + size
+ < tmp_next->va_start) {
+ addr = ALIGN(tmp->va_end, align);
+ goto found;
+ }
if (tmp->va_start <= addr)
break;
n = n->rb_left;
--
1.9.1
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next reply other threads:[~2017-07-16 7:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-16 7:28 Zhaoyang Huang [this message]
2017-07-17 7:00 ` [PATCH] mm/vmalloc: terminate searching since one node found Michal Hocko
-- strict thread matches above, loose matches on Subject: below --
2017-07-16 7:23 Zhaoyang Huang
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