Re: [PATCH v2 6/8] migration: Dump sub-cmd name in loadvm_process_command tp

[David Edmondson]

On Monday, 2021-12-20 at 16:53:53 +08, Peter Xu wrote:

> It'll be easier to read the name rather than index of sub-cmd when debugging.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  migration/savevm.c     | 3 ++-
>  migration/trace-events | 2 +-
>  2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/migration/savevm.c b/migration/savevm.c
> index 0bef031acb..7f7af6f750 100644
> --- a/migration/savevm.c
> +++ b/migration/savevm.c
> @@ -2272,12 +2272,13 @@ static int loadvm_process_command(QEMUFile *f)
>          return qemu_file_get_error(f);
>      }
>
> -    trace_loadvm_process_command(cmd, len);
>      if (cmd >= MIG_CMD_MAX || cmd == MIG_CMD_INVALID) {
>          error_report("MIG_CMD 0x%x unknown (len 0x%x)", cmd, len);
>          return -EINVAL;
>      }
>
> +    trace_loadvm_process_command(mig_cmd_args[cmd].name, len);
> +
>      if (mig_cmd_args[cmd].len != -1 && mig_cmd_args[cmd].len != len) {
>          error_report("%s received with bad length - expecting %zu, got %d",
>                       mig_cmd_args[cmd].name,
> diff --git a/migration/trace-events b/migration/trace-events
> index b48d873b8a..d63a5915f5 100644
> --- a/migration/trace-events
> +++ b/migration/trace-events
> @@ -22,7 +22,7 @@ loadvm_postcopy_handle_resume(void) ""
>  loadvm_postcopy_ram_handle_discard(void) ""
>  loadvm_postcopy_ram_handle_discard_end(void) ""
>  loadvm_postcopy_ram_handle_discard_header(const char *ramid, uint16_t len) 
> "%s: %ud"
> -loadvm_process_command(uint16_t com, uint16_t len) "com=0x%x len=%d"
> +loadvm_process_command(const char *s, uint16_t len) "com=%s len=%d"

"cmd" rather than "com", to match the code.

>  loadvm_process_command_ping(uint32_t val) "0x%x"
>  postcopy_ram_listen_thread_exit(void) ""
>  postcopy_ram_listen_thread_start(void) ""

dme.
-- 
I went starin' out of my window, been caught doin' it once or twice.