From: Jianpeng Ma <jianpeng.ma@intel.com>
Date: Fri, 26 Dec 2014 01:58:24 +0000 (+0800)
Subject: FileJournal: Don't cache journal data if journal w/o directio mode
X-Git-Tag: v0.92~93^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=45fb9a3b5d16dfef7ef2760c162144fd58fc0c5a;p=ceph.git

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>
---

diff --git a/src/os/FileJournal.cc b/src/os/FileJournal.cc
index e2fa715f0a91..73b284154635 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
   }