From b9c1c0fe7cf495e7b36c776dea2985b106ac9dd2 Mon Sep 17 00:00:00 2001
From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Tue, 10 Jan 2017 15:07:20 +0800
Subject: [PATCH] os/bluestore/KernelDevice: kill zeros

This is not needed anymore and can save us 1MB memory.

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
---
 src/os/bluestore/KernelDevice.cc | 2 --
 src/os/bluestore/KernelDevice.h  | 1 -
 2 files changed, 3 deletions(-)

diff --git a/src/os/bluestore/KernelDevice.cc b/src/os/bluestore/KernelDevice.cc
index dd238b7140c0b..24b18430941f2 100644
--- a/src/os/bluestore/KernelDevice.cc
+++ b/src/os/bluestore/KernelDevice.cc
@@ -46,8 +46,6 @@ KernelDevice::KernelDevice(CephContext* cct, aio_callback_t cb, void *cbpriv)
     aio_thread(this),
     injecting_crash(0)
 {
-  zeros = buffer::create_page_aligned(1048576);
-  zeros.zero();
 }
 
 int KernelDevice::_lock()
diff --git a/src/os/bluestore/KernelDevice.h b/src/os/bluestore/KernelDevice.h
index a76abf9d9be98..f302923f97365 100644
--- a/src/os/bluestore/KernelDevice.h
+++ b/src/os/bluestore/KernelDevice.h
@@ -29,7 +29,6 @@ class KernelDevice : public BlockDevice {
   string path;
   FS *fs;
   bool aio, dio;
-  bufferptr zeros;
 
   Mutex debug_lock;
   interval_set<uint64_t> debug_inflight;
-- 
2.39.5