os/bluestore: only calculate csum when necessary

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
ceph · Jul 5, 2016 · c5e61a2 · c5e61a2
1 parent fa8107a
commit c5e61a2
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
@@ -5770,7 +5770,9 @@ void BlueStore::_do_write_small(
 	  bdev->aio_write(offset, t,
 			  &txc->ioc, wctx->buffered);
 	});
-      b->blob.calc_csum(b_off, padded);
+      if (b->blob.csum_type) {
+        b->blob.calc_csum(b_off, padded);
+      }
       o->onode.punch_hole(offset, length, &wctx->lex_old);
       dout(20) << __func__ << "  lexold 0x" << std::hex << offset << std::dec
 	       << ": " << ep->second << dendl;