Re: [Bug #15704] [r8169] WARNING: at net/sched/sch_generic.c

Sergey Senozhatsky
2010-07-26T14:57:42Z

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On (07/26/10 16:34), Eric Dumazet wrote:
> > Sorry for the dealy - I've been away.
> > So, the bad news are that this is probably the last time I can test this bug. This laptop will
> > no longer be available. Sorry.
> >
> >
> > [ 2599.495508] pktgen 2.73: Packet Generator for packet performance testing.
> > [ 2630.016019] ------------[ cut here ]------------
> > [ 2630.016031] WARNING: at net/sched/sch_generic.c:258 dev_watchdog+0xc1/0x129()
> > [ 2630.016035] Hardware name: F3JC
> > [ 2630.016038] NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out
> > [ 2630.016041] Modules linked in: pktgen ipv6 arc4 ecb iwl3945 snd_hwdep iwlcore snd_seq_dummy snd_hda_codec_si3054 snd_hda_codec_realtek snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device mac80211 snd_pcm_oss snd_mixer_oss asus_laptop
> > snd_hda_intel sparse_keymap sdhci_pci sdhci mmc_core led_class cfg80211 snd_hda_codec snd_pcm snd_timer snd_page_alloc snd rng_core soundcore usb_storage sg psmouse evdev i2c_i801 serio_raw r8169 mii uhci_hcd ehci_hcd sd_mod sr_mod usbcore
> > cdrom ata_piix
> > [ 2630.016114] Pid: 4282, comm: kpktgend_0 Not tainted 2.6.35-rc6-dbg-git1-00136-g459ab2a-dirty #75
> > [ 2630.016118] Call Trace:
> > [ 2630.016125] [<c102e3ae>] warn_slowpath_common+0x65/0x7a
> > [ 2630.016131] [<c12695f3>] ? dev_watchdog+0xc1/0x129
> > [ 2630.016136] [<c102e427>] warn_slowpath_fmt+0x26/0x2a
> > [ 2630.016142] [<c12695f3>] dev_watchdog+0xc1/0x129
> > [ 2630.016149] [<c10370b3>] ? run_timer_softirq+0x136/0x22b
> > [ 2630.016154] [<c103710c>] run_timer_softirq+0x18f/0x22b
> > [ 2630.016160] [<c10370b3>] ? run_timer_softirq+0x136/0x22b
> > [ 2630.016165] [<c1269532>] ? dev_watchdog+0x0/0x129
> > [ 2630.016171] [<c1032c35>] __do_softirq+0x88/0x10c
> > [ 2630.016177] [<c1032ce8>] do_softirq+0x2f/0x47
> > [ 2630.016182] [<c1032fa5>] irq_exit+0x38/0x75
> > [ 2630.016187] [<c10159b8>] smp_apic_timer_interrupt+0x5f/0x6d
> > [ 2630.016195] [<f80555e4>] ? pktgen_xmit+0xda2/0xe6f [pktgen]
> > [ 2630.016202] [<c12c75a2>] apic_timer_interrupt+0x36/0x3c
> > [ 2630.016208] [<f80555e4>] ? pktgen_xmit+0xda2/0xe6f [pktgen]
> > [ 2630.016214] [<f80555e4>] ? pktgen_xmit+0xda2/0xe6f [pktgen]
> > [ 2630.016220] [<c104007b>] ? __kfifo_peek_n+0x13/0x2b
> > [ 2630.016226] [<c1032edd>] ? _local_bh_enable_ip+0x9d/0xb3
> > [ 2630.016231] [<c1032efb>] local_bh_enable_ip+0x8/0xa
> > [ 2630.016236] [<c12c6aaa>] _raw_spin_unlock_bh+0x2f/0x32
> > [ 2630.016242] [<f80555e4>] pktgen_xmit+0xda2/0xe6f [pktgen]
> > [ 2630.016253] [<f91707b8>] ? rtl8169_start_xmit+0x0/0x307 [r8169]
> > [ 2630.016261] [<c11800d8>] ? plist_add+0x85/0x87
> > [ 2630.016267] [<f80558ac>] ? pktgen_thread_worker+0x96/0x5c3 [pktgen]
> > [ 2630.016273] [<c1029096>] ? get_parent_ip+0xb/0x31
> > [ 2630.016279] [<c1029138>] ? sub_preempt_count+0x7c/0x89
> > [ 2630.016285] [<f8055986>] pktgen_thread_worker+0x170/0x5c3 [pktgen]
> > [ 2630.016290] [<c12c52bb>] ? schedule+0x535/0x545
> > [ 2630.016296] [<c103fd96>] ? autoremove_wake_function+0x0/0x2f
> > [ 2630.016301] [<c103fd96>] ? autoremove_wake_function+0x0/0x2f
> > [ 2630.016307] [<f8055816>] ? pktgen_thread_worker+0x0/0x5c3 [pktgen]
> > [ 2630.016313] [<c103faa6>] kthread+0x6a/0x6f
> > [ 2630.016318] [<c103fa3c>] ? kthread+0x0/0x6f
> > [ 2630.016324] [<c1002d82>] kernel_thread_helper+0x6/0x10
> > [ 2630.016328] ---[ end trace 0bdadff7f249bd0d ]---
> > [ 2630.032549] r8169 0000:02:00.0: eth0: link up
> >
> >
> > Sergey
>

Hello,

> r8169 driver misses a netif_carrier_off() call somewhere, probably when
> adapter is reset
>
> Sergey, do you run a pktgen only test (sending packets, and not
> receiving packets during the test), or a mixed workload ?
>

Only sending.

--
PGDEV=/proc/net/pktgen/eth0
echo "Configuring $PGDEV"
pgset "$COUNT"
pgset "$CLONE_SKB"
pgset "$PKT_SIZE"
pgset "$DELAY"
pgset "dst 192.168.x.x"
pgset "dst_mac x:x:x:x:x:x"

PGDEV=/proc/net/pktgen/pgctrl

echo "Running..."
pgset "start"
--

> r8169 is known to reset if the RX ring buffer is stressed too much.
>

Sergey

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