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Date:	Tue, 16 Mar 2010 16:05:33 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	David Miller <davem@...emloft.net>,
	Ingo Molnar <mingo@...e.hu>,
	Francois Romieu <romieu@...zoreil.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	netdev@...r.kernel.org, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] r8169: Fix rtl8169_rx_interrupt()

Le mardi 16 mars 2010 à 17:00 +0200, Sergey Senozhatsky a écrit :
> Nope!
> Here it is:
> 
> 
> [17250.998293] ------------[ cut here ]------------
> [17250.998305] WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0xc1/0x125()
> [17250.998308] Hardware name: F3JC                
> [17250.998312] NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out
> [17250.998315] Modules linked in: pktgen ppp_async crc_ccitt ipv6 ppp_generic slhc snd_hwdep snd_hda_codec_si3054 snd_hda_codec_realtek sdhci_pci sdhci asus_laptop sparse_keymap
> mmc_core led_class snd_hda_intel snd_hda_codec snd_pcm snd_timer snd_page_alloc rng_core sg evdev i2c_i801 snd soundcore psmouse r8169 serio_raw mii uhci_hcd ehci_hcd sr_mod
> usbcore cdrom sd_mod ata_piix
> [17250.998371] Pid: 3985, comm: kpktgend_0 Tainted: G        W  2.6.34-rc1-dbg-git6-r8169 #46
> [17250.998375] Call Trace:
> [17250.998383]  [<c102e353>] warn_slowpath_common+0x65/0x7c
> [17250.998388]  [<c126b654>] ? dev_watchdog+0xc1/0x125
> [17250.998393]  [<c102e39e>] warn_slowpath_fmt+0x24/0x27
> [17250.998398]  [<c126b654>] dev_watchdog+0xc1/0x125
> [17250.998405]  [<c1036bbb>] ? run_timer_softirq+0x120/0x1eb
> [17250.998411]  [<c1036c11>] run_timer_softirq+0x176/0x1eb
> [17250.998416]  [<c1036bbb>] ? run_timer_softirq+0x120/0x1eb
> [17250.998421]  [<c126b593>] ? dev_watchdog+0x0/0x125
> [17250.998426]  [<c1032df9>] __do_softirq+0x8d/0x117
> [17250.998431]  [<c1032eae>] do_softirq+0x2b/0x43
> [17250.998436]  [<c1032fd3>] irq_exit+0x38/0x75
> [17250.998442]  [<c1014e75>] smp_apic_timer_interrupt+0x66/0x74
> [17250.998448]  [<c12c812a>] apic_timer_interrupt+0x36/0x3c
> [17250.998457]  [<c1185d18>] ? do_raw_spin_trylock+0x28/0x37
> [17250.998464]  [<c12c7101>] _raw_spin_lock+0x2f/0x58
> [17250.998472]  [<f80855ca>] ? spin_lock+0x8/0xa [pktgen]
> [17250.998478]  [<f80855ca>] spin_lock+0x8/0xa [pktgen]
> [17250.998484]  [<f80873b6>] pktgen_thread_worker+0x9b/0x631 [pktgen]
> [17250.998491]  [<c103f9f1>] ? autoremove_wake_function+0x0/0x2f
> [17250.998497]  [<c103f9f1>] ? autoremove_wake_function+0x0/0x2f
> [17250.998503]  [<f808731b>] ? pktgen_thread_worker+0x0/0x631 [pktgen]
> [17250.998508]  [<c103f6ce>] kthread+0x6a/0x6f
> [17250.998514]  [<c103f664>] ? kthread+0x0/0x6f
> [17250.998520]  [<c1002e42>] kernel_thread_helper+0x6/0x1a
> [17250.998523] ---[ end trace a22d306b065d4a68 ]---
> [17251.011663] r8169 0000:02:00.0: eth0: link up
> 
> [17419.011748] NOHZ: local_softirq_pending 08
> 
> 

But this stack trace is on pktgen side (the sender), and my patch was
about the receiver ?

I wonder if you dont hit another problem :)


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