linux-kernel - Re: [PATCH net-next v4] net/sock: Introduce trace_sk_data

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Message-ID: <20221013235851.GA29973@bytedance>
Date:   Thu, 13 Oct 2022 16:58:51 -0700
From:   Peilin Ye <yepeilin.cs@...il.com>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Peilin Ye <peilin.ye@...edance.com>,
        Cong Wang <cong.wang@...edance.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v4] net/sock: Introduce trace_sk_data_ready()

On Thu, Oct 13, 2022 at 12:43:29PM +0300, Leon Romanovsky wrote:
> On Wed, Oct 12, 2022 at 04:21:21PM -0700, Peilin Ye wrote:
> > From: Peilin Ye <peilin.ye@...edance.com>
> > 
> > As suggested by Cong, introduce a tracepoint for all ->sk_data_ready()
> > callback implementations.  For example:
> > 
> > <...>
> >   ksoftirqd/0-16  [000] ..s..  99.784482: sk_data_ready: family=10 protocol=58 func=sock_def_readable
> >   ksoftirqd/0-16  [000] ..s..  99.784819: sk_data_ready: family=10 protocol=58 func=sock_def_readable
> > <...>
> > 
> > Suggested-by: Cong Wang <cong.wang@...edance.com>
> > Signed-off-by: Peilin Ye <peilin.ye@...edance.com>
> > ---
> > changes since v3:
> >   - Avoid using __func__ everywhere (Leon Romanovsky)
> >   - No need to trace iscsi_target_sk_data_ready() (Leon Romanovsky)
> 
> I meant no need both trace point and debug print and suggested to remove
> debug print.

Ah, I see.  I will clean up redundant debug prints in
iscsi_target_sk_data_ready(), rds_tcp_listen_data_ready() and
rds_tcp_data_ready() in separate patches.

Thanks,
Peilin Ye