[Qemu-devel] [PATCH] migration: fix live migration failure with compression

[Liang Li]

Because of commit 11808bb0c422, which remove some condition checks
of 'f->ops->writev_buffer', 'qemu_put_qemu_file' should be enhanced
to clear the 'f_src->iovcnt', or 'f_src->iovcnt' may exceed the
MAX_IOV_SIZE which will break live migration. This should be fixed.

Signed-off-by: Liang Li <address@hidden>
Reported-by: Jinshi Zhang <address@hidden>
---
 migration/qemu-file.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index bbc565e..e9fae31 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -668,6 +668,7 @@ int qemu_put_qemu_file(QEMUFile *f_des, QEMUFile *f_src)
         len = f_src->buf_index;
         qemu_put_buffer(f_des, f_src->buf, f_src->buf_index);
         f_src->buf_index = 0;
+        f_src->iovcnt = 0;
     }
     return len;
 }
-- 
1.9.1