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Message-Id: <20101020.030308.39191390.davem@davemloft.net> Date: Wed, 20 Oct 2010 03:03:08 -0700 (PDT) From: David Miller <davem@...emloft.net> To: eric.dumazet@...il.com Cc: netdev@...r.kernel.org Subject: Re: [PATCH net-next] net: avoid RCU for NOCACHE dst From: Eric Dumazet <eric.dumazet@...il.com> Date: Fri, 15 Oct 2010 17:44:11 +0200 > There is no point using RCU for dst we allocate for a very short time > (used once). > > Change dst_release() to take DST_NOCACHE into account, but also change > skb_dst_set_noref() to force a refcount increment for such dst. > > This is a _huge_ gain, because we dont waste memory to store xx thousand > of dsts. Instead of queueing them to RCU, we can free them instantly. ... > Signed-off-by: Eric Dumazet <eric.dumazet@...il.com> Wonderful, we are now faster without the routing cache. :-) Applied. -- 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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