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Date: Sat, 05 Apr 2008 20:14:43 +0200 From: Soeren Sonnenburg <kernel@....de> To: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi> Cc: Linux Kernel <linux-kernel@...r.kernel.org>, Netdev <netdev@...r.kernel.org> Subject: Re: 2.6.25-rc8: WARNING: at net/ipv4/tcp_input.c:2173 tcp_mark_head_lost+0x11d/0x150() On Sat, 2008-04-05 at 20:52 +0300, Ilpo Järvinen wrote: > On Sat, 5 Apr 2008, Soeren Sonnenburg wrote: > > > On Fri, 2008-04-04 at 21:51 +0300, Ilpo Järvinen wrote: > > > On Thu, 3 Apr 2008, Soeren Sonnenburg wrote: > > > > > > > On Thu, 2008-04-03 at 16:26 +0300, Ilpo Järvinen wrote: > > > > > On Thu, 3 Apr 2008, Soeren Sonnenburg wrote: > > > > > > > > > > > trying to download things, I am seeing this (ignore the tainted, it is > > > > > > from madwifi and although the module is loaded the device was never > > > > > > used) > > > > > > > > > > > > Could anyone make sense of this please? [...] > > > > > > Here's a debug patch which expensively verifies TCP's state in a number > > > of places during ACK to find first spot where the actual bug occurs. > > > > OK I am getting this now as the first spot: > > > > P: 4 L: 2 vs 2 S: 0 vs 3 F: 0 vs 0 w: 4023500226-4023505874 (0) > > skb 0 f495c180 > > skb 1 f480a180 > > skb 2 f4994600 > > head 3 f495c780 > > skb 4 f5b32480 > > TCP wq(s) LL < > > WARNING: at net/ipv4/tcp_ipv4.c:240 tcp_verify_wq+0x319/0x3c0() > > > > another one: > > WARNING: at net/ipv4/tcp_output.c:1475 __tcp_push_pending_frames+0x70/0x830() > > > > > > P: 4 L: 2 vs 2 S: 0 vs 3 F: 0 vs 0 w: 4023500226-4023505874 (0) > > skb 0 f495c180 > > skb 1 f480a180 > > skb 2 f4994600 > > head 3 f495c780 > > skb 4 f5b32480 > > TCP wq(s) LL < > > TCP wq(h) +-++< > > l2 s3 f0 p4 seq: su4023500226 hs241530103 sn4023505874 > > ------------[ cut here ]------------ > > WARNING: at net/ipv4/tcp_ipv4.c:240 tcp_verify_wq+0x319/0x3c0() > > Please don't cut the log! It is caught here because 2+3 > 4 :-) but I need > the full log with stacktraces this time to figure it out. Look here http://nn7.de/debugging/tcp.log :-) HTH, Soeren -- 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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