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Date: Wed, 25 Feb 2009 16:16:24 +0800 From: Herbert Xu <herbert@...dor.apana.org.au> To: David Miller <davem@...emloft.net> Cc: nhorman@...driver.com, shemminger@...tta.com, netdev@...r.kernel.org, kuznet@....inr.ac.ru, pekkas@...core.fi, jmorris@...ei.org, yoshfuji@...ux-ipv6.org Subject: Re: [RFC] addition of a dropped packet notification service On Tue, Feb 24, 2009 at 11:48:40PM -0800, David Miller wrote: > > Here's an idea that doesn't use tracepoints (I really don't like > them, to be honest): > > 1) Isolate the normal packet freeing contexts, have them call > kfree_skb_clean() or something like that. > > 2) What remains are the abnormal drop cases. They still call > plain kfree_skb() which records __builtin_return_address(0) > and builds a hash table of counts call sites. > > Then you just dump the table via some user visible interface. This sounds like a great idea to me. Thanks, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- 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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