linux-kernel - Re: [PATCH] net: xfrm: use preempt-safe this_cpu_read() in ipcomp_alloc

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Message-ID: <20180308184020.GA10422@gondor.apana.org.au>
Date:   Fri, 9 Mar 2018 02:40:20 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Greg Hackmann <ghackmann@...gle.com>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] net: xfrm: use preempt-safe this_cpu_read() in
 ipcomp_alloc_tfms()

On Thu, Mar 08, 2018 at 08:31:47AM -0800, Eric Dumazet wrote:
>
> Because that would not be nice.
> 
> this_cpu_read() is faster than going through raw_smp_processor_id() and
> per_cpu_ptr()

I see.  In that case I have no objections to this patch.

Thanks,
-- 
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