[PATCH v2] net/pcap: fix timeout of stopping device

[Zhou, YidingX]

> -----Original Message-----
> From: Stephen Hemminger <stephen at networkplumber.org>
> Sent: Tuesday, September 6, 2022 10:58 PM
> To: Zhou, YidingX <yidingx.zhou at intel.com>
> Cc: dev at dpdk.org; Zhang, Qi Z <qi.z.zhang at intel.com>; Burakov, Anatoly
> <anatoly.burakov at intel.com>; He, Xingguang <xingguang.he at intel.com>;
> stable at dpdk.org
> Subject: Re: [PATCH v2] net/pcap: fix timeout of stopping device
> 
> On Tue,  6 Sep 2022 16:05:11 +0800
> Yiding Zhou <yidingx.zhou at intel.com> wrote:
> 
> > The pcap file will be synchronized to the disk when stopping the device.
> > It takes a long time if the file is large that would cause the 'detach
> > sync request' timeout when the device is closed under multi-process
> > scenario.
> >
> > This commit fixes the issue by using alarm handler to release dumper.
> >
> > Fixes: 0ecfb6c04d54 ("net/pcap: move handler to process private")
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Yiding Zhou <yidingx.zhou at intel.com>
> 
> 
> I think you need to redesign the handshake if this the case.
> Forcing 30 second delay at the end of all uses of pcap is not acceptable.

@Zhang, Qi Z Do we need to redesign the handshake to fix this?