linux-kernel - Re: [PATCH] padata: Use RCU when fetching pd from do

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Message-ID: <20190716135235.f3nvzdyryjnmmzi5@gondor.apana.org.au>
Date:   Tue, 16 Jul 2019 21:52:35 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Steffen Klassert <steffen.klassert@...unet.com>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        andrea.parri@...rulasolutions.com, boqun.feng@...il.com,
        paulmck@...ux.ibm.com, linux-arch@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] padata: Use RCU when fetching pd from do_serial

On Tue, Jul 16, 2019 at 03:50:10PM +0200, Peter Zijlstra wrote:
>
> Could well be, I'm not much familiar with this code; I'll look more
> careful.

My patch is broken anyway.  We can't just switch pd structures
as the code relies on going to exactly the same CPU on the starting
pd to ensure ordering.

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