From: Eric Dumazet <eric.dumazet@gmail.com>
To: Haiyang Zhang <haiyangz@microsoft.com>
Cc: David Miller <davem@davemloft.net>,
"edumazet@google.com" <edumazet@google.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
KY Srinivasan <kys@microsoft.com>
Subject: Re: [PATCH v2 net-next] net: make skb_set_owner_w() more robust
Date: Mon, 02 Nov 2015 12:09:25 -0800 [thread overview]
Message-ID: <1446494965.23275.28.camel@edumazet-glaptop2.roam.corp.google.com> (raw)
In-Reply-To: <BN1PR0301MB0770C038C9E0F34EBCCB605FCA2C0@BN1PR0301MB0770.namprd03.prod.outlook.com>
On Mon, 2015-11-02 at 20:05 +0000, Haiyang Zhang wrote:
> Thanks for the fix!
> For some driver, like ours, this condition may not be "unlikely".
> So could you remove the "unlikely"?
No, I wont remove the unlikely.
Look, your main issue is about reallocating skbs, because of excessive
dev->needed_headroom.
An unlikely() mismatch is 1000 times less expensive, why would you
care ?
If you really care, fix your driver to not abuse skb->head to store 220
bytes of private data.
next prev parent reply other threads:[~2015-11-02 20:09 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-29 21:49 [patch] tcp: attach SYNACK messages to request sockets instead of listener Haiyang Zhang
2015-10-29 22:58 ` Eric Dumazet
2015-10-30 19:38 ` Haiyang Zhang
2015-10-30 20:02 ` Eric Dumazet
2015-10-30 20:18 ` Eric Dumazet
2015-10-30 21:42 ` Haiyang Zhang
2015-10-30 23:52 ` Eric Dumazet
2015-11-01 17:20 ` [PATCH net-next] net: increase LL_MAX_HEADER if HYPERV_NET is enabled Eric Dumazet
2015-11-01 20:58 ` David Miller
2015-11-01 22:36 ` Eric Dumazet
2015-11-01 22:58 ` [PATCH net-next] net: make skb_set_owner_w() more robust Eric Dumazet
2015-11-01 23:18 ` kbuild test robot
2015-11-01 23:27 ` Eric Dumazet
2015-11-01 23:36 ` [PATCH v2 " Eric Dumazet
2015-11-02 20:05 ` Haiyang Zhang
2015-11-02 20:09 ` Eric Dumazet [this message]
2015-11-02 20:26 ` David Miller
2015-11-02 21:29 ` David Miller
2015-11-03 7:59 ` [PATCH net-next] net: increase LL_MAX_HEADER if HYPERV_NET is enabled KY Srinivasan
2015-11-03 15:33 ` David Miller
2015-11-03 16:37 ` Eric Dumazet
2015-11-03 17:34 ` Haiyang Zhang
2015-11-03 18:20 ` David Miller
2015-11-03 18:49 ` Haiyang Zhang
2015-11-03 19:50 ` David Miller
2015-11-03 21:00 ` Haiyang Zhang
2015-11-03 18:09 ` KY Srinivasan
2015-10-30 20:28 ` [patch] tcp: attach SYNACK messages to request sockets instead of listener KY Srinivasan
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