From: Jianpeng Ma <jianpeng.ma@intel.com>
Date: Mon, 27 Oct 2014 03:22:13 +0000 (+0800)
Subject: ObjectStore: Don't use largest_data_off to calc data_align.
X-Git-Tag: v0.89~64
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a1aa70f2f21339feabfe9c1b3c9c9f97fbd53c9d;p=ceph.git

ObjectStore: Don't use largest_data_off to calc data_align.

If largest_data_off % CEPH_PAGE_SIZE != 0, the get_data_aligment return
a erro value. This make the FileJouranl::align_bl to memcopy much data.

Tested-by: Sage Weil <sage@redhat.com>
Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>
---

diff --git a/src/os/ObjectStore.h b/src/os/ObjectStore.h
index 1043547a1c21..6ea02edb407b 100644
--- a/src/os/ObjectStore.h
+++ b/src/os/ObjectStore.h
@@ -525,7 +525,7 @@ public:
     int get_data_alignment() {
       if (!largest_data_len)
 	return -1;
-      return (largest_data_off - get_data_offset()) & ~CEPH_PAGE_MASK;
+      return (0 - get_data_offset()) & ~CEPH_PAGE_MASK;
     }
     /// Is the Transaction empty (no operations)
     bool empty() {