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Open Source and information security mailing list archives
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Date: Wed, 7 May 2014 06:33:46 +0200 From: Andi Kleen <andi@...stfloor.org> To: Eric Dumazet <eric.dumazet@...il.com> Cc: Andi Kleen <ak@...ux.intel.com>, Richard Cochran <richardcochran@...il.com>, josh@...htriplett.org, David Miller <davem@...emloft.net>, andi@...stfloor.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, tom.zanussi@...ux.intel.com Subject: Re: [PATCH 08/24] net, diet: Make TCP metrics optional On Tue, May 06, 2014 at 04:29:39PM -0700, Eric Dumazet wrote: > On Tue, 2014-05-06 at 14:05 -0700, Andi Kleen wrote: > > > - Make GRO optional. > > This is purely a performance feature for high bandwidth. > > Make this properly then, instead of relying on LTO. > > We did preliminary work to put this stuff in separate files, but its not > complete yet. FWIW doesn't matter for LTO. > > tcpv4_offload has pointers to tcp4_gro_receive() and tcp4_gro_complete() > > Is LTO smart enough to understand this will never be called, and do > proper code elimination of whole _gro_ helpers ? When there are pointers in static objects it cannot eliminate it for C (it may work for C++) However if you just remove the pointer it'll remove the rest. -Andi -- ak@...ux.intel.com -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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