netdev - Re: [PATCH net-next] sock: add sndbuff full perf trace event

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Date:   Sun, 23 Jan 2022 12:17:36 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Joe Damato <jdamato@...tly.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org
Subject: Re: [PATCH net-next] sock: add sndbuff full perf trace event

On Thu, Jan 20, 2022 at 02:02:30PM -0800, Joe Damato wrote:
> Calls to sock_alloc_send_pskb can fail or trigger a wait if there is no
> sndbuf space available.
> 
> Add a perf trace event to help users monitor when and how this occurs so
> appropriate application level changes can be made, if necessary.
> 
> Signed-off-by: Joe Damato <jdamato@...tly.com>
> ---
>  include/trace/events/sock.h | 21 +++++++++++++++++++++
>  net/core/sock.c             |  1 +
>  2 files changed, 22 insertions(+)

There are more places where we set the SOCKWQ_ASYNC_NOSPACE bit, so
it looks like your patch is incomplete.

Thanks.