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Message-ID: <20130520172749.2a4447b6@nehalam.linuxnetplumber.net> Date: Mon, 20 May 2013 17:27:49 -0700 From: Stephen Hemminger <stephen@...workplumber.org> To: Francois Romieu <romieu@...zoreil.com> Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org Subject: Re: [PATCH net 2/2] 8139cp: reset BQL when ring tx ring cleared On Mon, 20 May 2013 23:37:28 +0200 Francois Romieu <romieu@...zoreil.com> wrote: > cp_stop_hw includes netdev_reset_queue. > > You have imho exhibited a start_xmit after cp_stop_hw race - not sure if > it happens in cp_tx_timeout or cp_change_mtu. Reverting the analysis above, > I have not found a place where cp_stop_hw could be called without being > followed by a cp_clean_rings. The netdev_reset_queue in cp_stop_hw, now > useless, should thus be removed. > > Does it make sense ? Your right, you could probably remove it. It doesn't solve the problem, still seeing transmit timeouts. Looks like what happens with DHCP is something else. zebra[2210]: interface eth0 index 2 changed <UP,BROADCAST,RUNNING,MULTICAST>. [ 23.960059] ------------[ cut here ]------------ [ 23.960107] WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x243/0x250() [ 23.960110] Hardware name: Bochs [ 23.960114] Modules linked in: 9p 9pnet fscache ipv6 tun mperf cpufreq_stats cpufreq_ondemand freq_table cpufreq_userspace cpufreq_conservative virtio_uio(O) cpufreq_powersave igb_uio(O) uio cirrus ttm drm_kms_helper drm sysimgblt sysfillrect virtio_balloon i2c_piix4 i2c_core hid_generic syscopyarea psmouse evdev serio_raw microcode pcspkr intel_agp intel_gtt agpgart processor thermal_sys button vfat fat usb_storage ohci_hcd squashfs loop overlayfs raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov usbhid hid raid6_pq async_tx raid1 raid0 multipath linear md_mod pata_acpi ata_generic virtio_blk virtio_net 8139cp ata_piix 8139too mii virtio_pci virtio_ring virtio floppy [ 23.960177] Pid: 0, comm: swapper/3 Tainted: G O 3.9.3-1-amd64-vyatta #1 [ 23.960179] Call Trace: [ 23.960181] <IRQ> [<ffffffff8105479b>] ? warn_slowpath_common+0x7b/0xc0 [ 23.960212] [<ffffffff81054895>] ? warn_slowpath_fmt+0x45/0x50 [ 23.960228] [<ffffffff814dfb45>] ? _raw_spin_lock+0x5/0x10 [ 23.960232] [<ffffffff8143dde3>] ? dev_watchdog+0x243/0x250 [ 23.960245] [<ffffffff810704c0>] ? __queue_work+0x2b0/0x2b0 [ 23.960253] [<ffffffff8143dba0>] ? __netdev_watchdog_up+0x70/0x70 [ 23.960257] [<ffffffff8143dba0>] ? __netdev_watchdog_up+0x70/0x70 [ 23.960262] [<ffffffff81064773>] ? call_timer_fn+0x43/0x130 [ 23.960265] [<ffffffff81064c27>] ? run_timer_softirq+0x237/0x280 [ 23.960269] [<ffffffff8107b200>] ? update_rmtp+0x80/0x80 [ 23.960272] [<ffffffff814dfb45>] ? _raw_spin_lock+0x5/0x10 [ 23.960276] [<ffffffff8105ca41>] ? __do_softirq+0xe1/0x270 [ 23.960280] [<ffffffff8105ccd5>] ? irq_exit+0xb5/0xc0 [ 23.960291] [<ffffffff81039fd8>] ? smp_apic_timer_interrupt+0x68/0xa0 [ 23.960302] [<ffffffff814e151d>] ? apic_timer_interrupt+0x6d/0x80 [ 23.960304] <EOI> [<ffffffff81042152>] ? native_safe_halt+0x2/0x10 [ 23.960318] [<ffffffff8101e1ef>] ? default_idle+0x3f/0xf0 [ 23.960323] [<ffffffff8101db48>] ? cpu_idle+0x88/0xd0 [ 23.960330] [<ffffffff814d547a>] ? start_secondary+0x211/0x216 [ 23.960333] ---[ end trace a519f7f509aceb9a ]--- [ 23.960407] 8139cp 0000:00:03.0 eth0: Transmit timeout, status d 3b 4 80ff [ 35.960137] 8139cp 0000:00:03.0 eth0: Transmit timeout, status d 3b 5 80ff [ 47.960108] 8139cp 0000:00:03.0 eth0: Transmit timeout, status d 3b 5 80ff [ 59.960117] 8139cp 0000:00:03.0 eth0: Transmit timeout, status d 3b 5 80ff [ 71.960115] 8139cp 0000:00:03.0 eth0: Transmit timeout, status d 3b 5 80ff [ 83.960117] 8139cp 0000:00:03.0 eth0: Transmit timeout, status d 3b 5 80ff [ 95.960131] 8139cp 0000:00:03.0 eth0: Transmit timeout, status d 3b 5 80ff ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ "messages" 35 lines, 2958 characters written -- 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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