Re: [Qemu-devel] [PATCH v2] error: only prepend timestamp on stderr

[Frank Schreuder <fschreuder@transip.nl>]

Op 8/10/2015 om 3:15 PM schreef Stefan Hajnoczi:
> The -msg timestamp=on option prepends a timestamp to error messages.
> This is useful on stderr where it allows users to identify when an error
> was raised.
>
> Timestamps do not make sense on the monitor since error_report() is
> called in response to a synchronous monitor command and the user already
> knows "when" the command was issued.  Additionally, the rest of the
> monitor conversation lacks timestamps so the error timestamp cannot be
> correlated with other activity.
>
> Only prepend timestamps on stderr.  This fixes libvirt's 'drive_del'
> processing, which did not expect a timestamp.  Other QEMU monitor
> clients are probably equally confused by timestamps on monitor error
> messages.
>
> Cc: Markus Armbruster <armbru@redhat.com>
> Cc: Seiji Aguchi <seiji.aguchi@hds.com>
> Cc: Frank Schreuder <fschreuder@transip.nl>
> Cc: Daniel P. Berrange <berrange@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  util/qemu-error.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/util/qemu-error.c b/util/qemu-error.c
> index 77ea6c6..c1574bb 100644
> --- a/util/qemu-error.c
> +++ b/util/qemu-error.c
> @@ -210,7 +210,7 @@ void error_vreport(const char *fmt, va_list ap)
>      GTimeVal tv;
>      gchar *timestr;
>  
> -    if (enable_timestamp_msg) {
> +    if (enable_timestamp_msg && !cur_mon) {
>          g_get_current_time(&tv);
>          timestr = g_time_val_to_iso8601(&tv);
>          error_printf("%s ", timestr);
Tested-by: Frank Schreuder <fschreuder@transip.nl>

Regards,
Frank