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Subject[PATCH] mm/vmalloc: terminate searching since one node found
Date
From: Zhaoyang Huang <zhaoyang.huang@spreadtrum.com:wq>

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>
---
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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