From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Tue, 17 May 2016 11:44:14 +0000 (+0800)
Subject: os/bluestore/BitMapAllocator: make nblks calculationg simpler and faster
X-Git-Tag: v11.0.0~367^2~4
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=679ed51748d64d7cc5b01b755f35c0e432924074;p=ceph.git

os/bluestore/BitMapAllocator: make nblks calculationg simpler and faster

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
---

diff --git a/src/os/bluestore/BitMapAllocator.cc b/src/os/bluestore/BitMapAllocator.cc
index 22cd3a5217d2..846ba6bc249a 100644
--- a/src/os/bluestore/BitMapAllocator.cc
+++ b/src/os/bluestore/BitMapAllocator.cc
@@ -88,8 +88,7 @@ int BitMapAllocator::allocate(
 {
 
   assert(!(alloc_unit % m_block_size));
-  int64_t len = NEXT_MULTIPLE(want_size, m_block_size);
-  int64_t nblks = len / m_block_size;
+  int64_t nblks = (want_size + m_block_size - 1) / m_block_size;
 
   assert(alloc_unit);