RE: [PATCH v1 1/2] colo-compare: Fix incorrect data type conversion

["Zhang, Chen" <chen.zhang@intel.com>]

> -----Original Message-----
> From: Derek Su <dereksu@qnap.com>
> Sent: Saturday, September 12, 2020 3:05 AM
> To: qemu-devel@nongnu.org
> Cc: Zhang, Chen <chen.zhang@intel.com>; lizhijian@cn.fujitsu.com;
> jasowang@redhat.com; Derek Su <dereksu@qnap.com>
> Subject: [PATCH v1 1/2] colo-compare: Fix incorrect data type conversion
> 
> Fix data type conversion of compare_timeout. The incorrect conversion
> results in a random compare_timeout value and unexpected stalls in packet
> comparison.
> 

This bug already found on our internal test too. Just waiting to send.
Good catch! But this patch not fixed the root cause.
Change the compare_timeout from uint32_t to uint64_t is better.
I will send a patch for this and tag reported by you.

Thanks
Zhang Chen


> Signed-off-by: Derek Su <dereksu@qnap.com>
> ---
>  net/colo-compare.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/net/colo-compare.c b/net/colo-compare.c index
> 2c20de1537..c4de86ef34 100644
> --- a/net/colo-compare.c
> +++ b/net/colo-compare.c
> @@ -619,11 +619,12 @@ static int colo_packet_compare_other(Packet *spkt,
> Packet *ppkt)
>                                         ppkt->size - offset);  }
> 
> -static int colo_old_packet_check_one(Packet *pkt, int64_t *check_time)
> +static int colo_old_packet_check_one(Packet *pkt, void *user_data)
>  {
>      int64_t now = qemu_clock_get_ms(QEMU_CLOCK_HOST);
> +    uint32_t check_time = *(uint32_t *)user_data;
> 
> -    if ((now - pkt->creation_ms) > (*check_time)) {
> +    if ((now - pkt->creation_ms) > check_time) {
>          trace_colo_old_packet_check_found(pkt->creation_ms);
>          return 0;
>      } else {
> --
> 2.25.1