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Message-ID: <m2r57xx9rn.fsf@firstfloor.org> Date: Tue, 17 May 2011 15:06:04 -0700 From: Andi Kleen <andi@...stfloor.org> To: David Miller <davem@...emloft.net> Cc: netdev@...r.kernel.org Subject: Re: small RPS cache for fragments? David Miller <davem@...emloft.net> writes: > > We're discussing the idea to do the defragmentation first > so we can choose the flow properly and steer the packet > to the correct cpu. > > This also would allos each fragmented packet to traverse the > stack only once (one route lookup etc.) instead of once per > fragment. You could always check first in a cheap way (e.g. a small hash table) if it's local or not (and bypass the defragmentation if routing is turned off or the hash table would have collisions) On the other hand if fragmentation is expensive it's probably better to do it later anyways to spread it out better. -Andi -- ak@...ux.intel.com -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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