[Xen-devel] [RFC PATCH 4/7] xc_domain_save: flush cache before calling callbacks->postcopy()

[Wen Congyang <wency@xxxxxxxxxxxxxx>]

callbacks->postcopy() may use the fd to transfer something to the
other end, so we should flush cache before calling callbacks->postcopy()

Signed-off-by: Ye Wei <wei.ye1987@xxxxxxxxx>
Signed-off-by: Jiang Yunhong <yunhong.jiang@xxxxxxxxx>
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
---
 tools/libxc/xc_domain_save.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/libxc/xc_domain_save.c b/tools/libxc/xc_domain_save.c
index 3aafa61..cc4004a 100644
--- a/tools/libxc/xc_domain_save.c
+++ b/tools/libxc/xc_domain_save.c
@@ -1886,9 +1886,6 @@ int xc_domain_save(xc_interface *xch, int io_fd, uint32_t 
dom, uint32_t max_iter
  out:
     completed = 1;
 
-    if ( !rc && callbacks->postcopy )
-        callbacks->postcopy(callbacks->data);
-
     /* Flush last write and discard cache for file. */
     if ( outbuf_flush(xch, &ob, io_fd) < 0 ) {
         PERROR("Error when flushing output buffer");
@@ -1897,6 +1894,9 @@ int xc_domain_save(xc_interface *xch, int io_fd, uint32_t 
dom, uint32_t max_iter
 
     discard_file_cache(xch, io_fd, 1 /* flush */);
 
+    if ( !rc && callbacks->postcopy )
+        callbacks->postcopy(callbacks->data);
+
     /* checkpoint_cb can spend arbitrarily long in between rounds */
     if (!rc && callbacks->checkpoint &&
         callbacks->checkpoint(callbacks->data) > 0)
-- 
1.8.0


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