Re: How to avoid kernel's receive buff full , then UDP packet dropped by kernel?

[Ryan Hamilton <[e-mail]>]

On the server side of a QUIC connection, the UDP socket (and hence the
kernel receive buffer) is shared across multiple connections. As such it'd
be incredibly complicated to come up with a system to handle this and would
likely result in unnecessarily throttling throughput. On the client side
(where there is once QUIC connection per socket) this is unlikely to happen
if the receive buffer is larger than the BDP of the link. Of course, in
reality, if the application is reading from the socket frequently enough,
this is likely a non-issue.

On Fri, Nov 29, 2019 at 4:53 AM Jiuhai Zhang <[e-mail]> wrote:

> Is there any good idea to solve this? How can we do flow control like TCP
> receive window size? User space can not get how many receive buff is used
>