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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jason Baron <jbaron@akamai.com>
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: Re: [PATCH v2 net-next 2/2] tcp: reduce cpu usage when SO_SNDBUF is set
Date: Wed, 22 Jun 2016 11:43:41 -0700	[thread overview]
Message-ID: <1466621021.6850.71.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <576AD666.7050809@akamai.com>

On Wed, 2016-06-22 at 14:18 -0400, Jason Baron wrote:
> 

> 
> For 1/2, the getting the correct memory barrier, should I re-submit
> that as a separate patch?

Are you sure a full memory barrier (smp_mb() is needed ?

Maybe smp_wmb() would be enough ?

(And smp_rmb() in tcp_poll() ?)

  reply	other threads:[~2016-06-22 18:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-22 15:32 [PATCH v2 net-next 0/2] tcp: reduce cpu usage when SO_SNDBUF is set Jason Baron
2016-06-22 15:32 ` [PATCH v2 net-next 1/2] tcp: replace smp_mb__after_atomic() with smp_mb() in tcp_poll() Jason Baron
2016-06-22 15:32 ` [PATCH v2 net-next 2/2] tcp: reduce cpu usage when SO_SNDBUF is set Jason Baron
2016-06-22 17:34   ` Eric Dumazet
2016-06-22 18:18     ` Jason Baron
2016-06-22 18:43       ` Eric Dumazet [this message]
2016-06-22 18:51         ` Eric Dumazet
2016-06-22 19:20           ` Jason Baron
2016-06-22 20:15             ` Eric Dumazet

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