From 45fb9a3b5d16dfef7ef2760c162144fd58fc0c5a Mon Sep 17 00:00:00 2001
From: Jianpeng Ma <jianpeng.ma@intel.com>
Date: Fri, 26 Dec 2014 09:58:24 +0800
Subject: [PATCH] FileJournal: Don't cache journal data if journal w/o directio
 mode

Only read journal data in osd starting.So no need to keep journal
data in kernel cache/buffer.

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>
---
 src/os/FileJournal.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/os/FileJournal.cc b/src/os/FileJournal.cc
index e2fa715f0a91f..73b2841546350 100644
--- a/src/os/FileJournal.cc
+++ b/src/os/FileJournal.cc
@@ -1077,6 +1077,10 @@ void FileJournal::do_write(bufferlist& bl)
     ::fsync(fd);
 #else
     ::fdatasync(fd);
+#endif
+#ifdef HAVE_POSIX_FADVISE
+    if (g_conf->filestore_fadvise)
+      posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
 #endif
   }
 
-- 
2.39.5