[CRIU] socket will take at least 0.5 seconds to recovery after docker restore done

[Pavel Emelyanov]

On 08/25/2015 07:21 AM, Yanbao Cui wrote:
> Hi,
> 
> Is there any update for this issue?

Nope, I actually expected you to put more debug in the kernel and report back :)

> On Friday, July 31, 2015, Pavel Emelyanov <xemul at parallels.com <mailto:xemul at parallels.com>> wrote:
> 
>     On 07/31/2015 09:54 AM, Yanbao Cui wrote:
>     > HI,
>     >
>     > Sorry for give the relative timestamp.
>     >
>     > Yeah, the gap cover my checkpoint/restore time. And larger than the whole migration time.
>     >
>     > It seems we can not find why the connection hang from the dump file
> 
>     Well, it's possible, but it would require more advanced debugging :) I would
>     patch/kprobe the kernel to printk() messages at these 2 points:
> 
>     1. tcp_send_window_probe()
>     2. tcp_v4_rcv()
> 
>     for the connection in question and checked the gap between the real repair-off
>     and the response.
> 
>     -- Pavel
> 
> 
> 
> -- 
> Best Regards
> Cui Yanbao | 崔言宝
> --
> 龍生玖天，豈能安於凡塵！