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Message-ID: <4AC5F446.4090202@gmail.com> Date: Fri, 02 Oct 2009 14:38:30 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi> CC: David Miller <davem@...emloft.net>, jarkao2@...il.com, holger.hoffstaette@...glemail.com, Netdev <netdev@...r.kernel.org>, Evgeniy Polyakov <zbr@...emap.net> Subject: Re: Network hangs with 2.6.30.5 Ilpo Järvinen a écrit : > On Fri, 2 Oct 2009, Ilpo Järvinen wrote: > >> On Thu, 1 Oct 2009, David Miller wrote: >> >>> From: Jarek Poplawski <jarkao2@...il.com> >>> Date: Mon, 7 Sep 2009 07:21:43 +0000 >>> >>>> While Eric is analyzing your data, I guess you could try reverting >>>> some stuff around this tcp_tw_recycle, and my tcp ignorance would >>>> point these commits for the beginning: >>>> >>>> http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.30.y.git;a=commitdiff;h=fc1ad92dfc4e363a055053746552cdb445ba5c57 >>>> http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.30.y.git;a=commitdiff;h=c887e6d2d9aee56ee7c9f2af4cec3a5efdcc4c72 >>> Ilpo's cleanup (the second commit listed) looks most likely to >>> be a possibility. >>> >>> But I surely cannot find any bugs in it, even after studying it >>> a few times. >>> >>> Ilpo could you audit it one more time for us just in case? >> Argh, not that one ...the jungle of negations. But I'll try to go it >> through once more but I tell you I did go through those negations multiple >> times already before submitting it :-). >> >>> I also looked through all the TCP commits in 2.6.29 to 2.6.30 >>> and I could not find anything else that might cause stalls with >>> time-wait recycled connections. >> What about the more than 64k connections change a9d8f9110d7e953c2f2 (or >> its fixes), it might be another possibility? ...It certainly does >> something related to reuse and happens to be in the correct time frame... >> (I've added Evgeniy). I scratched my head to reproduce the conditions of hang but failed. I am pretty sure both commits are OK (yours and mine), maybe a brute force git bisection is needed. -- 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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