[RFC Patch v2 03/17] don't zero out ioreq page

[Wen Congyang <wency@cn.fujitsu.com>]

ioreq page may contain some pending I/O requests, and we need to
handle the pending I/O req after migration.

TODO:
1. update qemu to handle the pending I/O req

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: Paul Durrant <paul.durrant@citrix.com>
---
 tools/libxc/xc_domain_restore.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/libxc/xc_domain_restore.c b/tools/libxc/xc_domain_restore.c
index 42abb22..2d6139c 100644
--- a/tools/libxc/xc_domain_restore.c
+++ b/tools/libxc/xc_domain_restore.c
@@ -2301,9 +2301,7 @@ int xc_domain_restore(xc_interface *xch, int io_fd, uint32_t dom,
     }
 
     /* These comms pages need to be zeroed at the start of day */
-    if ( xc_clear_domain_page(xch, dom, tailbuf.u.hvm.magicpfns[0]) ||
-         xc_clear_domain_page(xch, dom, tailbuf.u.hvm.magicpfns[1]) ||
-         xc_clear_domain_page(xch, dom, tailbuf.u.hvm.magicpfns[2]) )
+    if ( xc_clear_domain_page(xch, dom, tailbuf.u.hvm.magicpfns[2]) )
     {
         PERROR("error zeroing magic pages");
         goto out;
-- 
1.9.3