netdev - Re: PROBLEM: potential concurrency bug in rhashtable.h

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Message-ID: <20200724005224.GA29920@gondor.apana.org.au>
Date:   Fri, 24 Jul 2020 10:52:24 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     "Gong, Sishuai" <sishuai@...due.edu>,
        "tgraf@...g.ch" <tgraf@...g.ch>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Sousa da Fonseca, Pedro Jose" <pfonseca@...due.edu>
Subject: Re: PROBLEM: potential concurrency bug in rhashtable.h

On Thu, Jul 23, 2020 at 05:34:15PM -0700, Eric Dumazet wrote:
>
> Sure, but __rht_ptr() is used with different RCU checks,
> I guess a that adding these lockdep conditions will make
> a patch more invasive.

Yes it is large but the only substantial change is to __rht_ptr
and its callers.  Everything else is just juggling RCU markings.

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