Re: virtio_net hang

[Emmanuel Lacour <elacour@easter-eggs.com>]

On Fri, Nov 21, 2008 at 09:38:23AM +0100, Emmanuel Lacour wrote:
> 
> I continue to have this problem with this setup:
> 
> - host 2.6.27.4, kvm-78, intel, debian etch 64bits
> - guest 2.6.27.6, debian sarge 32 bits, e1000, 2 vcpus
> 
> up/down of interface is enough to recover.
> 


Today I had a trace on this problem (first time), maybe this can help:

Nov 21 14:34:42 foo kernel: [58345.000104] ------------[ cut here ]------------
Nov 21 14:34:42 foo kernel: [58345.000617] WARNING: at net/sched/sch_generic.c:219 dev_watchdog+0x164/0x1fd()
Nov 21 14:34:42 foo kernel: [58345.001374] NETDEV WATCHDOG: eth0 (e1000): transmit timed out
Nov 21 14:34:42 foo kernel: [58345.001825] Modules linked in: nfsd auth_rpcgss exportfs ac battery ipv6 nfs lockd nfs_acl sunrpc nf_nat_ftp nf_conntrack_ftp xt_tcpudp iptable_mangle iptable_nat nf_nat ipt_REJECT xt_limit nf_conntrack_ipv4 xt_state nf_conntrack ipt_LOG ipt_ULOG iptable_filter ip_tables x_tables dm_mod sd_mod snd_pcsp virtio_balloon snd_pcm snd_timer snd soundcore floppy snd_page_alloc psmouse serio_raw virtio_pci i2c_piix4 button i2c_core evdev ext3 jbd mbcache ide_cd_mod cdrom ide_disk ata_generic ata_piix libata scsi_mod dock piix ide_core uhci_hcd e1000 usbcore thermal processor fan thermal_sys
Nov 21 14:34:42 foo kernel: [58345.022597] Pid: 0, comm: swapper Not tainted 2.6.27.6 #1
Nov 21 14:34:42 foo kernel: [58345.023027]  [<c0126295>] warn_slowpath+0x58/0x70
Nov 21 14:34:42 foo kernel: [58345.023470]  [<c028e96b>] ip_output+0x8e/0x90
Nov 21 14:34:42 foo kernel: [58345.029292]  [<c028e3ab>] ip_local_out+0x15/0x17
Nov 21 14:34:42 foo kernel: [58345.030231]  [<c028ec1d>] ip_queue_xmit+0x2b0/0x2f7
Nov 21 14:34:42 foo kernel: [58345.030684]  [<c01169c7>] pvclock_get_nsec_offset+0xb/0x59
Nov 21 14:34:42 foo kernel: [58345.031163]  [<c0116a79>] pvclock_clocksource_read+0x1a/0x2d
Nov 21 14:34:42 foo kernel: [58345.031642]  [<c01169c7>] pvclock_get_nsec_offset+0xb/0x59
Nov 21 14:34:42 foo kernel: [58345.032130]  [<c0116a79>] pvclock_clocksource_read+0x1a/0x2d
Nov 21 14:34:42 foo kernel: [58345.032608]  [<c01169c7>] pvclock_get_nsec_offset+0xb/0x59
Nov 21 14:34:42 foo kernel: [58345.033080]  [<c01169c7>] pvclock_get_nsec_offset+0xb/0x59
Nov 21 14:34:42 foo kernel: [58345.033570]  [<c01169c7>] pvclock_get_nsec_offset+0xb/0x59
Nov 21 14:34:42 foo kernel: [58345.034036]  [<c0116a79>] pvclock_clocksource_read+0x1a/0x2d
Nov 21 14:34:42 foo kernel: [58345.034506]  [<c027e572>] dev_watchdog+0x164/0x1fd
Nov 21 14:34:42 foo kernel: [58345.034951]  [<c0139cf7>] __atomic_notifier_call_chain+0x10/0x13
Nov 21 14:34:42 foo kernel: [58345.035455]  [<c02d4c73>] _spin_lock_bh+0xf/0x12
Nov 21 14:34:42 foo kernel: [58345.035898]  [<c012d9a4>] timer_stats_account_timer+0x22/0x27
Nov 21 14:34:42 foo kernel: [58345.036384]  [<c012dfcf>] run_timer_softirq+0x11f/0x183
Nov 21 14:34:42 foo kernel: [58345.036840]  [<c027e40e>] dev_watchdog+0x0/0x1fd
Nov 21 14:34:42 foo kernel: [58345.037278]  [<c01390dc>] hrtimer_interrupt+0x136/0x15e
Nov 21 14:34:42 foo kernel: [58345.037736]  [<c012a53f>] __do_softirq+0x69/0xd3
Nov 21 14:34:42 foo kernel: [58345.038172]  [<c012a5ed>] do_softirq+0x44/0x52
Nov 21 14:34:42 foo kernel: [58345.038608]  [<c012a67e>] irq_exit+0x38/0x6c
Nov 21 14:34:42 foo kernel: [58345.039035]  [<c01106f1>] smp_apic_timer_interrupt+0x2a/0x33
Nov 21 14:34:42 foo kernel: [58345.039518]  [<c0104434>] apic_timer_interrupt+0x28/0x30
Nov 21 14:34:42 foo kernel: [58345.039980]  [<c0116560>] native_safe_halt+0x2/0x3
Nov 21 14:34:42 foo kernel: [58345.040443]  [<c0109196>] default_idle+0x2e/0x54
Nov 21 14:34:42 foo kernel: [58345.040886]  [<c01020ff>] cpu_idle+0xc4/0xf7
Nov 21 14:34:42 foo kernel: [58345.041310]  =======================
Nov 21 14:34:42 foo kernel: [58345.041692] ---[ end trace 934a9cb836d2434b ]---
Nov 21 14:34:42 foo kernel: [58345.080575] e1000: eth0: e1000_watchdog: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None