netdev - Re: [PATCH net-next 1/3] net: provide macros for commonly copied lockless queue stop/wake code

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Message-ID: <ZC9ueqlByZyf0HUO@gondor.apana.org.au>
Date:   Fri, 7 Apr 2023 09:14:34 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "Paul E. McKenney" <paulmck@...nel.org>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>, davem@...emloft.net,
        netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com
Subject: Re: [PATCH net-next 1/3] net: provide macros for commonly copied
 lockless queue stop/wake code

On Thu, Apr 06, 2023 at 06:03:37PM -0700, Jakub Kicinski wrote:
>
> I couldn't find a check in netpoll/netconsole which would defer
> when in hardirq. Does it defer?

Right, netconsole is the one exception that can occur in any
context.  However, as I said in the previous email I don't see
how this can break the wake logic and leave the queue stopped
forever.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt