Date:	Fri, 27 Mar 2009 20:31:34 +0100
From:	Jesper Krogh <jesper@...gh.cc>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: niu driver - Transmit timed out - 2.6.29

Jesper Krogh wrote:
> Ok. I was just so happy .. (See "Status update on Sun Neptune 10Gbit 
> driver earlier).
> 
> But then it "blew up" again:
> 
> Mar 26 13:25:49 hest kernel: [25335.505049] ------------[ cut here 
> ]------------
> Mar 26 13:25:49 hest kernel: [25335.505055] WARNING: at 
> net/sched/sch_generic.c:226 dev_watchdog+0x1fd/0x210()
> Mar 26 13:25:49 hest kernel: [25335.505057] Hardware name: Sun Fire 
> X4600 M2
> Mar 26 13:25:49 hest kernel: [25335.505059] NETDEV WATCHDOG: eth4 (niu): 
> transmit timed out
> Mar 26 13:25:49 hest kernel: [25335.505060] Modules linked in: af_packet 
> ext4 jbd2 crc16 nfsd exportfs autofs4 nfs lockd auth_rpcgss sunrpc 
> iptable_filter ip_tables x_tables ib_iser rdma_cm ib_cm iw_cm ib_sa 
> ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi 
> scsi_transport_iscsi ipv6 parport_pc lp parport loop sr_mod joydev 
> psmouse niu usb_storage usbhid i2c_nforce2 libusual hid serio_raw pcspkr 
> shpchp k8temp pci_hotplug i2c_core button evdev ext3 jbd mbcache 
> ide_cd_mod cdrom sg sd_mod ata_generic libata mptsas mptspi mptscsih 
> qla2xxx mptbase scsi_transport_sas scsi_transport_fc ehci_hcd 
> scsi_transport_spi ohci_hcd e1000 scsi_mod amd74xx usbcore dm_mirror 
> dm_region_hash dm_log dm_snapshot dm_mod thermal processor fan 
> thermal_sys fuse
> Mar 26 13:25:49 hest kernel: [25335.505109] Pid: 0, comm: swapper Not 
> tainted 2.6.29 #30
> Mar 26 13:25:49 hest kernel: [25335.505111] Call Trace:
> Mar 26 13:25:49 hest kernel: [25335.505113]  <IRQ>  [<ffffffff8023d5c2>] 
> warn_slowpath+0xf2/0x130
> Mar 26 13:25:49 hest kernel: [25335.505124]  [<ffffffff80239d2d>] 
> task_tick_fair+0x4d/0xd0
> Mar 26 13:25:49 hest kernel: [25335.505130]  [<ffffffff80355e33>] 
> cpumask_next_and+0x23/0x40
> Mar 26 13:25:49 hest kernel: [25335.505132]  [<ffffffff80233f84>] 
> find_busiest_group+0x204/0x870
> Mar 26 13:25:49 hest kernel: [25335.505136]  [<ffffffff8035b65e>] 
> strlcpy+0x4e/0x80
> Mar 26 13:25:49 hest kernel: [25335.505138]  [<ffffffff8041f11d>] 
> dev_watchdog+0x1fd/0x210
> Mar 26 13:25:49 hest kernel: [25335.505141]  [<ffffffff80235ac5>] 
> run_rebalance_domains+0x3c5/0x530
> Mar 26 13:25:49 hest kernel: [25335.505143]  [<ffffffff802474bb>] 
> run_timer_softirq+0x1bb/0x230
> Mar 26 13:25:49 hest kernel: [25335.505148]  [<ffffffff802574e1>] 
> sched_clock_cpu+0x131/0x180
> Mar 26 13:25:49 hest kernel: [25335.505151]  [<ffffffff80242cdb>] 
> __do_softirq+0x8b/0x150
> Mar 26 13:25:49 hest kernel: [25335.505155]  [<ffffffff8020d3bc>] 
> call_softirq+0x1c/0x30
> Mar 26 13:25:49 hest kernel: [25335.505157]  [<ffffffff8020e505>] 
> do_softirq+0x35/0x80
> Mar 26 13:25:49 hest kernel: [25335.505161]  [<ffffffff8021f715>] 
> smp_apic_timer_interrupt+0x85/0xd0
> Mar 26 13:25:49 hest kernel: [25335.505163]  [<ffffffff8020cdf3>] 
> apic_timer_interrupt+0x13/0x20
> Mar 26 13:25:49 hest kernel: [25335.505164]  <EOI>  [<ffffffff80212dc7>] 
> default_idle+0x27/0x40
> Mar 26 13:25:49 hest kernel: [25335.505169]  [<ffffffff80212fea>] 
> c1e_idle+0xba/0x100
> Mar 26 13:25:49 hest kernel: [25335.505171]  [<ffffffff8020ae80>] 
> cpu_idle+0x40/0x70
> Mar 26 13:25:49 hest kernel: [25335.505173] ---[ end trace 
> e6e4f250dc22390d ]---

There was actually a bit more in the log:

Mar 26 13:25:49 hest kernel: [25335.505176] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:25:49 hest kernel: [25335.587191] niu 0000:84:00.0: niu: eth4: 
bits (40000000) of register RXDMA_CFIG1 would not cl
ear, val[c0000000]
Mar 26 13:25:49 hest last message repeated 4 times
Mar 26 13:25:58 hest kernel: [25345.504898] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:26:08 hest kernel: [25355.504758] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:26:13 hest kernel: [25360.504687] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:26:18 hest kernel: [25365.504619] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:26:23 hest kernel: [25370.504549] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:26:28 hest kernel: [25375.504479] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:26:33 hest kernel: [25380.504409] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting
Mar 26 13:26:38 hest kernel: [25385.504340] niu 0000:84:00.0: niu: eth4: 
Transmit timed out, resetting

This is probably the interesting part:
Mar 26 13:25:49 hest kernel: [25335.587191] niu 0000:84:00.0: niu: eth4: 
bits (40000000) of register RXDMA_CFIG1 would not clear, val[c0000000]

Any suggestions?

Is this perhaps just broken hardware.. or a driver issue?  (I had the 
Sun nxge driver working for around 180 days on the same card.. so I 
would assume the hardware is ok).

Jesper
-- 
Jesper

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