>-----Original Message----- >From: netdev-ow...@vger.kernel.org [mailto:netdev-ow...@vger.kernel.org] >On Behalf Of Joe Jin >Sent: Tuesday, July 10, 2012 12:40 AM >To: Joe Jin >Cc: e1000-de...@lists.sf.net; net...@vger.kernel.org; linux- >ker...@vger.kernel.org >Subject: Re: 82571EB: Detected Hardware Unit Hang > >When I debug the driver I found before Detected HW hang, driver unable to >clean and reclaim the resources: > >1457 while ((eop_desc->upper.data & >cpu_to_le32(E1000_TXD_STAT_DD)) && <== at here upper.data always is 0x300 >1458 (count < tx_ring->count)) { > <--- snip ---> >1487 } > > >I checked all driver codes I did not found anywhere will set the >upper.data with E1000_TXD_STAT_DD, I guess upper.data be set by hardware?
Yes upper.data (part of it is STATUS byte) is set by HW. Basically driver checks E1000_TXD_STAT_DD (Descriptor Done) bit. If this bit is set that means HW has processed that descriptor and driver can now clean that descriptor. With value 0x300 , DD bit is not set. That means HW has not processed that descriptor. How fast does tx hang reproduce? I suggest you to enable debug code in driver so when tx hang occurs it will dump the HW desc ring info into kernel log. You can run "ethtool -s ethx msglvl 0x2c00" to enable debug. Once tx hang occurs please send me the full dmesg log. Does tx hang occur with in-kernel e1000e driver too? Thanks. -Tushar >If OS is 32bit system, what which happen? > >Thanks in advance, >Joe > >On 07/09/12 16:51, Joe Jin wrote: >> Hi list, >> >> I'm seeing a Unit Hang even with the latest e1000e driver 2.0.0 when >> doing scp test. this issue is easy do reproduced on SUN FIRE X2270 M2, >> just copy a big file (>500M) from another server will hit it at once. >> >> Would you please help on this? >> >> device info: >> # lspci -s 05:00.0 >> 05:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit >> Ethernet Controller (Copper) (rev 06) >> >> # lspci -s 05:00.0 -n >> 05:00.0 0200: 8086:10bc (rev 06) >> >> # ethtool -i eth0 >> driver: e1000e >> version: 2.0.0-NAPI >> firmware-version: 5.10-2 >> bus-info: 0000:05:00.0 >> >> # ethtool -k eth0 >> Offload parameters for eth0: >> rx-checksumming: on >> tx-checksumming: on >> scatter-gather: on >> tcp segmentation offload: on >> udp fragmentation offload: off >> generic segmentation offload: on >> generic-receive-offload: on >> >> kernel log: >> ----------- >> e1000e 0000:05:00.0: eth0: Detected Hardware Unit Hang: >> TDH <6c> >> TDT <81> >> next_to_use <81> >> next_to_clean <6b> >> buffer_info[next_to_clean]: >> time_stamp <fffc7a23> >> next_to_watch <71> >> jiffies <fffc8c0c> >> next_to_watch.status <0> >> MAC Status <80387> >> PHY Status <792d> >> PHY 1000BASE-T Status <3c00> >> PHY Extended Status <3000> >> PCI Status <10> >> e1000e 0000:05:00.0: eth0: Detected Hardware Unit Hang: >> TDH <6c> >> TDT <81> >> next_to_use <81> >> next_to_clean <6b> >> buffer_info[next_to_clean]: >> time_stamp <fffc7a23> >> next_to_watch <71> >> jiffies <fffc9bac> >> next_to_watch.status <0> >> MAC Status <80387> >> PHY Status <792d> >> PHY 1000BASE-T Status <3c00> >> PHY Extended Status <3000> >> PCI Status <10> >> ------------[ cut here ]------------ >> WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x225/0x230() >> Hardware name: SUN FIRE X2270 M2 NETDEV WATCHDOG: eth0 (e1000e): >> transmit queue 0 timed out Modules linked in: autofs4 hidp rfcomm >> bluetooth rfkill lockd sunrpc cpufreq_ondemand acpi_cpufreq mperf >> be2iscsi iscsi_boot_sysfs ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad >> ib_core ib_addr iscsi_tcp bnx2i cnic uio ipv6 cxgb3i libcxgbi cxgb3 >> mdio libiscsi_tcp libiscsi scsi_transport_iscsi video sbs sbshc >> acpi_pad acpi_ipmi ipmi_msghandler parport_pc lp parport e1000e(U) >> snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device >> igb snd_pcm_oss serio_raw snd_mixer_oss snd_pcm tpm_infineon snd_timer >> snd soundcore snd_page_alloc i2c_i801 iTCO_wdt i2c_core pcspkr >> i7core_edac iTCO_vendor_support ioatdma ghes dca edac_core hed >> dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod usb_storage >> sd_mod crc_t10dif sg ahci libahci ext3 jbd mbcache [last unloaded: >> microcode] >> Pid: 0, comm: swapper Not tainted 2.6.39-200.24.1.el5uek #1 Call >> Trace: >> [<c07d9ac5>] ? dev_watchdog+0x225/0x230 [<c045ba61>] >> warn_slowpath_common+0x81/0xa0 [<c07d9ac5>] ? >> dev_watchdog+0x225/0x230 [<c045bb23>] warn_slowpath_fmt+0x33/0x40 >> [<c07d9ac5>] dev_watchdog+0x225/0x230 [<c07d98a0>] ? >> dev_activate+0xb0/0xb0 [<c0468e82>] call_timer_fn+0x32/0xf0 >> [<c04bceb0>] ? rcu_check_callbacks+0x80/0x80 [<c046a76d>] >> run_timer_softirq+0xed/0x1b0 [<c07d98a0>] ? dev_activate+0xb0/0xb0 >> [<c0461a81>] __do_softirq+0x91/0x1a0 [<c04619f0>] ? >> local_bh_enable+0x80/0x80 <IRQ> [<c0462295>] ? irq_exit+0x95/0xa0 >> [<c087f8b8>] ? smp_apic_timer_interrupt+0x38/0x42 >> [<c08784f5>] ? apic_timer_interrupt+0x31/0x38 [<c046007b>] ? >> do_exit+0x11b/0x370 [<c065eae4>] ? intel_idle+0xa4/0x100 >> [<c078d9b9>] ? cpuidle_idle_call+0xb9/0x1e0 [<c0411d77>] ? >> cpu_idle+0x97/0xd0 [<c085cbbd>] ? rest_init+0x5d/0x70 [<c0b07a7a>] ? >> start_kernel+0x28a/0x340 [<c0b074b0>] ? obsolete_checksetup+0xb0/0xb0 >> [<c0b070a4>] ? i386_start_kernel+0x64/0xb0 ---[ end trace >> 5502b55cd4d4e5cb ]--- e1000e 0000:05:00.0: eth0: Reset adapter >> e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx >> >> Thanks, >> Joe >> > > >-- >Oracle <http://www.oracle.com> >Joe Jin | Software Development Senior Manager | +8610.6106.5624 ORACLE | >Linux and Virtualization No. 24 Zhongguancun Software Park, Haidian >District | 100193 Beijing > > >-- >To unsubscribe from this list: send the line "unsubscribe netdev" in >the body of a message to majord...@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
