From: Kefu Chai <kchai@redhat.com>
Date: Mon, 7 Sep 2020 06:05:20 +0000 (+0800)
Subject: common/buffer_seastar: reserve the packet slots in ctor
X-Git-Tag: v16.1.0~1169^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F37015%2Fhead;p=ceph.git

common/buffer_seastar: reserve the packet slots in ctor

for better performance, and simpler this way

Signed-off-by: Kefu Chai <kchai@redhat.com>
---

diff --git a/src/common/buffer_seastar.cc b/src/common/buffer_seastar.cc
index 8d77cf8f6b67..7d0e98e379a9 100644
--- a/src/common/buffer_seastar.cc
+++ b/src/common/buffer_seastar.cc
@@ -74,8 +74,7 @@ ptr::operator seastar::temporary_buffer<char>() &&
 
 list::operator seastar::net::packet() &&
 {
-  seastar::net::packet p;
-  p.reserve(_num);
+  seastar::net::packet p(_num);
   for (auto& ptr : _buffers) {
     // append each ptr as a temporary_buffer
     p = seastar::net::packet(std::move(p), std::move(ptr));