netdev - Re: [PATCH] net: remove lockdep asserts from ____napi

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Date:   Sat, 19 Mar 2022 13:01:04 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     netdev@...r.kernel.org, wireguard@...ts.zx2c4.com, kuba@...nel.org,
        Saeed Mahameed <saeed@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH] net: remove lockdep asserts from ____napi_schedule()

On 2022-03-18 18:47:38 [-0600], Jason A. Donenfeld wrote:
> This reverts commit fbd9a2ceba5c ("net: Add lockdep asserts to
> ____napi_schedule()."). While good in theory, in practice it causes
> issues with various drivers, and so it can be revisited earlier in the
> cycle where those drivers can be adjusted if needed.

Do you plan to address to address the wireguard warning?

> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -4277,9 +4277,6 @@ static inline void ____napi_schedule(struct softnet_data *sd,
>  {
>  	struct task_struct *thread;
>  
> -	lockdep_assert_softirq_will_run();
> -	lockdep_assert_irqs_disabled();

Could you please keep that lockdep_assert_irqs_disabled()? That is
needed regardless of the upper one.

Sebastian