From: Juraj Marcin <[email protected]> If the length of the data sent after CMD_PACKAGED is just right, and there is not much data to send afterward, it is possible part of the CMD_PACKAGED payload will get left behind in the sending buffer. This causes the destination side to hang while it tries to load the whole package and initiate postcopy.
Signed-off-by: Juraj Marcin <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Peter Xu <[email protected]> --- migration/savevm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/migration/savevm.c b/migration/savevm.c index 232cae090b..fa017378db 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -1142,6 +1142,7 @@ int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len) qemu_savevm_command_send(f, MIG_CMD_PACKAGED, 4, (uint8_t *)&tmp); qemu_put_buffer(f, buf, len); + qemu_fflush(f); return 0; } -- 2.50.1
