Re: [PATCH] tcp: Namespace-ify sysctl_tcp_rmem and sysctl_tcp_wmem

[Sasha Levin]

On Thu, Feb 14, 2019 at 01:12:08AM +0000, Alakesh Haloi wrote:
> [ Upstream commit 356d1833b638bd465672aefeb71def3ab93fc17d ]
>
> Note that when a new netns is created, it inherits its
> sysctl_tcp_rmem and sysctl_tcp_wmem from initial netns.
>
> This change is needed so that we can refine TCP rcvbuf autotuning,
> to take RTT into consideration.
>
> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
> Cc: Wei Wang <weiwan@xxxxxxxxxx>
> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
> [alakeshh: backport to v4.14: The patch does not apply to v4.14
> directly and hence needed manual backport. Function signature for
> the function tcp_select_initial_window had to be changed to be able
> to pass pointer to struct sock.]
> Signed-off-by: Alakesh Haloi <alakeshh@xxxxxxxxxx>
> Cc: Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>
> Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>
> Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.14.x

What does this fix? This is a new interface...

--
Thanks,
Sasha