From: Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
To: Eric Dumazet <eric.dumazet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Herbert Xu
<herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>,
Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Shlomo Pongratz <shlomop-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH 2/2] IB/ipoib: fix GRO merge failure for IPoIB originated TCP streams
Date: Thu, 2 Feb 2012 17:43:16 +0200 [thread overview]
Message-ID: <4F2AAF14.5060701@mellanox.com> (raw)
In-Reply-To: <1328193495.2279.51.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
On 2/2/2012 4:38 PM, Eric Dumazet wrote:
>>> Maybe we can keep a fastpath for ethernet case... (the "if (hlen == ETH_HLEN) being always predicted) Maybe need to introduce gro_hard_header_len as well)
>>
>> today, IPoIB advertizes hard_header_len which is bigger than the IPoIB
>> header len, this is done such that skbs sent by the network stack have
>> enough headroom for a "pseudoheader" which for few flows (e.g unicast
>> arp replies and multicast) is placed there by the ipoib hard_header
>> function and later used by the xmit function.
>>
>> So we can either try and change that, such that hard_header_len will be equal to the ipoib header len or add gro_hard_header_len as you suggested, any preferences?
>
> I guess changing hard_header_len might be difficult (for you).
> Adding gro_mac_header_len sounds the easy way. [ You'll need to set it in your device setup() ]
Eric, yep, I'm okay with adding gro_mac_header_len, such that if the
device setup function doesn't touch it, the core sets it to
hard_header_len and later the gro code uses that len in the comparison
you have placed in your patch. The ipoib setup code will set that field
to the IPoIB header size. If you enhance a bit your patch to include
that I could do the testing or you prefer me to do that? do you think we
need two or one patch here?
Or.
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next prev parent reply other threads:[~2012-02-02 15:43 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <alpine.LRH.2.00.1201261624540.30384@ogerlitz.voltaire.com>
[not found] ` <alpine.LRH.2.00.1201261642340.31408@ogerlitz.voltaire.com>
[not found] ` <alpine.LRH.2.00.1201261642340.31408-VYr5/9ddeaGSIdy2EShu12Xnswh1EIUO@public.gmane.org>
2012-01-30 4:36 ` [PATCH 2/2] IB/ipoib: fix GRO merge failure for IPoIB originated TCP streams Roland Dreier
[not found] ` <CAL1RGDUm8ROxFFMa+D1ZD5jF+cK+kV8aEVzspgnZFNXeuai+fA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-01-30 7:44 ` Shlomo Pongratz
[not found] ` <36F7E4A28C18BE4DB7C86058E7B607240BE9687A-SlGPd/IId7auSA5JZHE7gA@public.gmane.org>
2012-01-30 18:11 ` Roland Dreier
[not found] ` <CAL1RGDXjjQ-PhCv-9WJX45NuovC9XiS=_7507OsyvLW_gBaJ5g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-01-30 18:16 ` Or Gerlitz
[not found] ` <CAJZOPZLhgDysSASyMLNpOrmGzEyfyHAQjGLVei6ZNSFfb7TM1w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-01-30 19:00 ` Roland Dreier
2012-01-30 7:44 ` Or Gerlitz
[not found] ` <4F264A6C.3070706-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2012-01-30 8:04 ` Eric Dumazet
2012-01-30 8:11 ` Or Gerlitz
2012-01-30 8:18 ` Herbert Xu
[not found] ` <20120130081849.GA7848-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2012-01-30 8:53 ` Eric Dumazet
2012-01-30 8:57 ` Herbert Xu
[not found] ` <20120130085742.GA8262-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2012-01-30 16:43 ` David Miller
2012-02-01 8:23 ` Or Gerlitz
[not found] ` <CAJZOPZJb1HvcS0XXKLvoDuoi1EfYTY-awwY2g0aHWoS=4qmdyQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-01 8:38 ` Herbert Xu
[not found] ` <20120201083837.GA7081-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2012-02-01 9:43 ` Or Gerlitz
2012-02-01 14:07 ` Eric Dumazet
2012-02-02 14:01 ` Or Gerlitz
[not found] ` <4F2A974B.209-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2012-02-02 14:38 ` Eric Dumazet
2012-02-02 14:44 ` Eric Dumazet
2012-02-02 21:42 ` Or Gerlitz
2012-02-02 15:43 ` Or Gerlitz [this message]
2012-01-30 8:25 ` Michał Mirosław
2012-02-02 21:58 ` Or Gerlitz
[not found] ` <alpine.LRH.2.00.1202022352560.30300-VYr5/9ddeaGSIdy2EShu12Xnswh1EIUO@public.gmane.org>
2012-02-03 7:18 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A823733349A5D2-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2012-02-03 9:00 ` Eric Dumazet
2012-02-03 20:24 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A823733349A6C9-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2012-02-06 15:05 ` Or Gerlitz
[not found] ` <4F2FEC36.6090800-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2012-02-06 15:21 ` Eric Dumazet
2012-02-06 15:22 ` Or Gerlitz
[not found] ` <4F2FF050.7040400-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2012-02-06 16:27 ` [PATCH net-next] gro: introduce gro_mac_header_len Eric Dumazet
2012-02-06 16:31 ` David Miller
[not found] ` <20120206.113145.1284864994961472499.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-06 16:44 ` Or Gerlitz
[not found] ` <4F300353.2080705-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2012-02-06 17:00 ` David Miller
2012-02-06 16:47 ` [PATCH net-next V2] " Eric Dumazet
2012-02-06 16:58 ` David Miller
2012-02-06 17:07 ` Eric Dumazet
2012-02-06 17:11 ` Or Gerlitz
[not found] ` <4F3009AE.2090605-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2012-02-06 17:19 ` Eric Dumazet
[not found] ` <20120206.115859.1384761795375582044.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-06 17:09 ` Or Gerlitz
2012-02-06 17:23 ` Roland Dreier
[not found] ` <CAG4TOxOBCbEEOtP62ZM1R3-6umebdbJFkK0bnjphLCZOgHzt1g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-06 19:12 ` David Miller
[not found] ` <20120206.141223.332863167187002998.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-06 19:23 ` Roland Dreier
[not found] ` <CAG4TOxNgJ3=AFuA==Km815YzW8eQ7nD_UAzkXLSXcAyaCAAvPg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-06 19:32 ` David Miller
[not found] ` <20120206.143230.1415707004934341114.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-06 19:51 ` David Miller
[not found] ` <20120206.145148.558736903670696169.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-06 19:56 ` David Miller
[not found] ` <20120206.145652.1575591691467905094.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-06 20:01 ` Roland Dreier
[not found] ` <CAG4TOxNcB8+SP3f0WhZG1GZ481s+=7pVRv91vzAbwDzUZD8g_A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-06 20:15 ` David Miller
[not found] ` <20120206.151509.1959432192519622134.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-07 19:51 ` Roland Dreier
2012-02-07 20:33 ` David Miller
[not found] ` <20120207.153325.1941809701255235550.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-07 20:34 ` Roland Dreier
[not found] ` <CAG4TOxP2iEgT64L8vAR6P139U-HyHSxU8gdWw+cLsDwWSGkrwA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-08 0:51 ` [PATCH] IPoIB: Stop lying about hard_header_len and use skb->cb to stash LL addresses Roland Dreier
2012-02-08 7:29 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373374C1C26-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2012-02-08 7:50 ` Eric Dumazet
2012-02-08 14:28 ` Or Gerlitz
2012-02-08 20:50 ` David Miller
2012-02-06 19:59 ` [PATCH net-next V2] gro: introduce gro_mac_header_len Roland Dreier
2012-02-08 18:51 ` [PATCH net-next] gro: more generic L2 header check Eric Dumazet
2012-02-08 20:50 ` David Miller
[not found] ` <20120208.155027.599792363539233740.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-08 21:08 ` Or Gerlitz
[not found] ` <CAJZOPZL_zEbNwUfVOmQeODny7HDf24gOc1HStfBxim_UtD-kvA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-08 21:31 ` David Miller
[not found] ` <20120208.163159.2229331610142060560.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-08 21:49 ` Or Gerlitz
[not found] ` <CAJZOPZLLteDbm0prTN3-npubtFun=kO2DYT7ea=E-HyJ84gaiA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-08 23:09 ` David Miller
[not found] ` <20120208.180917.586628615268005115.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-08 23:20 ` Or Gerlitz
[not found] ` <CAJZOPZ+SyGsDpnK89wNWtBn4Jdzc2tg1diKjbHSv=n75XiG+ug-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-08 23:26 ` David Miller
[not found] ` <20120208.182629.1816927738607872730.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-09 10:46 ` Or Gerlitz
[not found] ` <4F33A3FC.1050205-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2012-02-09 18:52 ` David Miller
[not found] ` <20120209.135235.957414875716615693.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-09 20:04 ` Or Gerlitz
2012-02-09 20:29 ` David Miller
[not found] ` <20120209.152943.1123862542883793404.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2012-02-09 22:18 ` Or Gerlitz
[not found] ` <CAJZOPZKUG-tT+Zd=1EiLhgRxg4VEDrisBJQ99XtARMvK68UWfA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-09 22:28 ` David Miller
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