From: Sage Weil <sage@redhat.com>
Date: Thu, 23 Jun 2016 14:00:17 +0000 (-0400)
Subject: os/bluestore/KernelDevice: rebuild buffer if we exceed IOV_MAX
X-Git-Tag: ses5-milestone5~545^2~8
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=ad08fd4eb9d901309a2408e113bee4b59b8fe934;p=ceph.git

os/bluestore/KernelDevice: rebuild buffer if we exceed IOV_MAX

Signed-off-by: Sage Weil <sage@redhat.com>
---

diff --git a/src/os/bluestore/KernelDevice.cc b/src/os/bluestore/KernelDevice.cc
index 2302633ad755..8c1d061ee7d8 100644
--- a/src/os/bluestore/KernelDevice.cc
+++ b/src/os/bluestore/KernelDevice.cc
@@ -385,10 +385,10 @@ int KernelDevice::aio_write(
   assert(off < size);
   assert(off + len <= size);
 
-  if (!buffered && bl.rebuild_aligned_size_and_memory(block_size, block_size)) {
+  if ((!buffered || bl.get_num_buffers() >= IOV_MAX) &&
+      bl.rebuild_aligned_size_and_memory(block_size, block_size)) {
     dout(20) << __func__ << " rebuilding buffer to be aligned" << dendl;
   }
-
   dout(40) << "data: ";
   bl.hexdump(*_dout);
   *_dout << dendl;