RE: hv_netvsc: WARNING in softirq.c

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> -----Original Message-----
> From: Richard GENOUD [mailto:richard.genoud@xxxxxxxxx]
> Sent: Thursday, February 28, 2013 3:35 AM
> To: KY Srinivasan
> Cc: Haiyang Zhang; devel@xxxxxxxxxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx;
> linux-kernel@xxxxxxxxxxxxxxx
> Subject: hv_netvsc: WARNING in softirq.c
> 
> Hi,
> 
> Here is the kernel trace I got this morning (kern.log):
> Feb 27 22:32:59 devlabo kernel: [10688.187062] hv_vmbus: child device
> vmbus_0_8 unregistered
> Feb 27 22:34:37 devlabo kernel: [10688.187196] ------------[ cut here ]-----------
> -
> Feb 27 22:34:37 devlabo kernel: [10688.187203] WARNING: at /build/buildd-
> linux_3.2.35-2-amd64-v9djlH/linux-3.2.35/kernel/softirq.c:159
> _local_bh_enable_ip.isra.11+0x3d/0x88()
> Feb 27 22:34:37 devlabo kernel: [10688.187206] Hardware name: Virtual
> Machine
> Feb 27 22:34:37 devlabo kernel: [10688.187208] Modules linked in:
> des_generic ecb md4 hmac nls_utf8 cifs nfsd nfs nfs_acl auth_rpcgss fscache
> lockd sunrpc loop snd_pcm snd_page_alloc snd_timer snd joydev processor
> hid_hyperv crc32c_intel hid thermal_sys i2c_piix4 evdev button soundcore
> hv_utils i2c_core psmouse serio_raw pcspkr ext4 crc16 jbd2 mbcache
> sd_mod crc_t10dif hv_netvsc hv_storvsc sg sr_mod cdrom ata_generic
> floppy hv_vmbus ata_piix libata scsi_mod [last unloaded: scsi_wait_scan]
> Feb 27 22:34:37 devlabo kernel: [10688.187244] Pid: 0, comm: swapper/0 Not
> tainted 3.2.0-4-amd64 #1 Debian 3.2.35-2
> Feb 27 22:34:37 devlabo kernel: [10688.187246] Call Trace:
> Feb 27 22:34:37 devlabo kernel: [10688.187248]  <IRQ>  [<ffffffff81046a75>] ?
> warn_slowpath_common+0x78/0x8c
> Feb 27 22:34:37 devlabo kernel: [10688.187257]  [<ffffffff8104bf76>] ?
> _local_bh_enable_ip.isra.11+0x3d/0x88
> Feb 27 22:34:37 devlabo kernel: [10688.187262]  [<ffffffffa00a59b5>] ?
> rndis_filter_receive+0x236/0x259 [hv_netvsc]
> Feb 27 22:34:37 devlabo kernel: [10688.187267]  [<ffffffffa00a4e5f>] ?
> netvsc_channel_cb+0x37a/0x449 [hv_netvsc]
> Feb 27 22:34:37 devlabo kernel: [10688.187273]  [<ffffffffa006211b>] ?
> vmbus_on_event+0x91/0xdd [hv_vmbus]
> Feb 27 22:34:37 devlabo kernel: [10688.187277]  [<ffffffff812432d5>] ?
> add_interrupt_randomness+0x38/0x155
> Feb 27 22:34:37 devlabo kernel: [10688.187283]  [<ffffffff8104b89a>] ?
> tasklet_action+0x73/0xc2
> Feb 27 22:34:37 devlabo kernel: [10688.187287]  [<ffffffff8104c084>] ?
> __do_softirq+0xb9/0x177
> Feb 27 22:34:37 devlabo kernel: [10688.187292]  [<ffffffff8135426c>] ?
> call_softirq+0x1c/0x30
> Feb 27 22:34:37 devlabo kernel: [10688.187297]  [<ffffffff8100f8dd>] ?
> do_softirq+0x3c/0x7b
> Feb 27 22:34:37 devlabo kernel: [10688.187300]  [<ffffffff8104c2ec>] ?
> irq_exit+0x3c/0x9a
> Feb 27 22:34:37 devlabo kernel: [10688.187303]  [<ffffffff8100f60d>] ?
> do_IRQ+0x82/0x98
> Feb 27 22:34:37 devlabo kernel: [10688.187307]  [<ffffffff8134d32e>] ?
> common_interrupt+0x6e/0x6e
> Feb 27 22:34:37 devlabo kernel: [10688.187309]  <EOI>  [<ffffffff81065dbd>] ?
> timekeeping_get_ns+0xd/0x2a
> Feb 27 22:34:37 devlabo kernel: [10688.187317]  [<ffffffff8106bc20>] ?
> arch_local_irq_enable+0x4/0x8
> Feb 27 22:34:37 devlabo kernel: [10688.187321]  [<ffffffff8100d286>] ?
> cpu_idle+0xe8/0xf2
> Feb 27 22:34:37 devlabo kernel: [10688.187324]  [<ffffffff816abb33>] ?
> start_kernel+0x3b3/0x3be
> Feb 27 22:34:37 devlabo kernel: [10688.187328]  [<ffffffff816ab140>] ?
> early_idt_handlers+0x140/0x140
> Feb 27 22:34:37 devlabo kernel: [10688.187331]  [<ffffffff816ab3c4>] ?
> x86_64_start_kernel+0x104/0x111
> Feb 27 22:34:37 devlabo kernel: [10688.187333] ---[ end trace
> 39158641c6e4b495 ]---
> 
> and there was a lot of them :
> Feb 26 22:35:14 devlabo kernel: [37398.788119] ------------[ cut here ]-----------
> -
> Feb 26 22:35:14 devlabo kernel: [37398.788129] WARNING: at /build/buildd-
> linux_3.2.35-2-amd64-v9djlH/linux-3.2.35/kernel/softirq.c:159
> _local_bh_enable_ip.isra.11+0x3d/0x88()
> Feb 26 22:35:14 devlabo kernel: [37398.788132] Hardware name: Virtual
> Machine
> Feb 26 22:35:14 devlabo kernel: [37398.788133] Modules linked in: nfsd nfs
> nfs_acl auth_rpcgss lockd sunrpc des_generic ecb md4 hmac nls_utf8 cifs
> fscache loop snd_pcm snd_page_alloc snd_timer joydev crc32c_intel
> i2c_piix4 snd processor hid_hyperv hid hv_utils soundcore button
> thermal_sys pcspkr i2c_core psmouse evdev serio_raw ext4 crc16 jbd2
> mbcache sd_mod crc_t10dif hv_netvsc hv_storvsc sg sr_mod cdrom
> ata_generic ata_piix libata scsi_mod floppy hv_vmbus [last unloaded:
> scsi_wait_scan]
> Feb 26 22:35:14 devlabo kernel: [37398.788169] Pid: 0, comm: swapper/0 Not
> tainted 3.2.0-4-amd64 #1 Debian 3.2.35-2
> Feb 26 22:35:14 devlabo kernel: [37398.788171] Call Trace:
> Feb 26 22:35:14 devlabo kernel: [37398.788172]  <IRQ>  [<ffffffff81046a75>] ?
> warn_slowpath_common+0x78/0x8c
> Feb 26 22:35:14 devlabo kernel: [37398.788181]  [<ffffffff8104bf76>] ?
> _local_bh_enable_ip.isra.11+0x3d/0x88
> Feb 26 22:35:14 devlabo kernel: [37398.788186]  [<ffffffffa009e9b5>] ?
> rndis_filter_receive+0x236/0x259 [hv_netvsc]
> Feb 26 22:35:14 devlabo kernel: [37398.788190]  [<ffffffffa009de5f>] ?
> netvsc_channel_cb+0x37a/0x449 [hv_netvsc]
> Feb 26 22:35:14 devlabo kernel: [37398.788196]  [<ffffffffa000111b>] ?
> vmbus_on_event+0x91/0xdd [hv_vmbus]
> Feb 26 22:35:14 devlabo kernel: [37398.788200]  [<ffffffff8104b89a>] ?
> tasklet_action+0x73/0xc2
> Feb 26 22:35:14 devlabo kernel: [37398.788203]  [<ffffffff8104c084>] ?
> __do_softirq+0xb9/0x177
> Feb 26 22:35:14 devlabo kernel: [37398.788207]  [<ffffffff81061755>] ?
> run_posix_cpu_timers+0x23/0x346
> Feb 26 22:35:14 devlabo kernel: [37398.788211]  [<ffffffff8135426c>] ?
> call_softirq+0x1c/0x30
> Feb 26 22:35:14 devlabo kernel: [37398.788216]  [<ffffffff8100f8dd>] ?
> do_softirq+0x3c/0x7b
> Feb 26 22:35:14 devlabo kernel: [37398.788218]  [<ffffffff8104c2ec>] ?
> irq_exit+0x3c/0x9a
> Feb 26 22:35:14 devlabo kernel: [37398.788222]  [<ffffffff810241c8>] ?
> smp_apic_timer_interrupt+0x74/0x82
> Feb 26 22:35:14 devlabo kernel: [37398.788225]  [<ffffffff81352ade>] ?
> apic_timer_interrupt+0x6e/0x80
> Feb 26 22:35:14 devlabo kernel: [37398.788227]  <EOI>  [<ffffffff81013a17>] ?
> native_sched_clock+0x27/0x2f
> Feb 26 22:35:14 devlabo kernel: [37398.788233]  [<ffffffff8102b360>] ?
> native_safe_halt+0x2/0x3
> Feb 26 22:35:14 devlabo kernel: [37398.788236]  [<ffffffff81014508>] ?
> default_idle+0x47/0x7f
> Feb 26 22:35:14 devlabo kernel: [37398.788238]  [<ffffffff8100d24d>] ?
> cpu_idle+0xaf/0xf2
> Feb 26 22:35:14 devlabo kernel: [37398.788241]  [<ffffffff816abb33>] ?
> start_kernel+0x3b3/0x3be
> Feb 26 22:35:14 devlabo kernel: [37398.788244]  [<ffffffff816ab140>] ?
> early_idt_handlers+0x140/0x140
> Feb 26 22:35:14 devlabo kernel: [37398.788247]  [<ffffffff816ab3c4>] ?
> x86_64_start_kernel+0x104/0x111
> Feb 26 22:35:14 devlabo kernel: [37398.788249] ---[ end trace
> 8f3991272dc0c5cc ]---
> Feb 26 22:35:14 devlabo kernel: [37398.789256] hv_vmbus: child device
> vmbus_0_8 unregistered
> 
> Feb  3 22:31:55 devlabo kernel: [37819.617243] ------------[ cut here ]-----------
> -
> Feb  3 22:31:55 devlabo kernel: [37819.617253] WARNING: at /build/buildd-
> linux_3.2.35-2-amd64-v9djlH/linux-3.2.35/kernel/softirq.c:159
> _local_bh_enable_ip.isra.11+0x3d/0x88()
> Feb  3 22:31:55 devlabo kernel: [37819.617257] Hardware name: Virtual
> Machine
> Feb  3 22:31:55 devlabo kernel: [37819.617259] Modules linked in: nfsd nfs
> nfs_acl auth_rpcgss lockd sunrpc des_generic ecb md4 hmac nls_utf8 cifs
> fscache loop joydev snd_pcm hid_hyperv hid snd_page_alloc snd_timer snd
> hv_utils i2c_piix4 i2c_core soundcore processor psmouse crc32c_intel
> thermal_sys button pcspkr evdev serio_raw ext4 crc16 jbd2 mbcache
> sd_mod crc_t10dif hv_netvsc hv_storvsc sg sr_mod cdrom ata_generic
> hv_vmbus ata_piix floppy libata scsi_mod [last unloaded: scsi_wait_scan]
> Feb  3 22:31:55 devlabo kernel: [37819.617308] Pid: 0, comm: swapper/0 Not
> tainted 3.2.0-4-amd64 #1 Debian 3.2.35-2
> Feb  3 22:31:55 devlabo kernel: [37819.617311] Call Trace:
> Feb  3 22:31:55 devlabo kernel: [37819.617313]  <IRQ>  [<ffffffff81046a75>] ?
> warn_slowpath_common+0x78/0x8c
> Feb  3 22:31:55 devlabo kernel: [37819.617324]  [<ffffffff8104bf76>] ?
> _local_bh_enable_ip.isra.11+0x3d/0x88
> Feb  3 22:31:55 devlabo kernel: [37819.617331]  [<ffffffffa00a09b5>] ?
> rndis_filter_receive+0x236/0x259 [hv_netvsc]
> Feb  3 22:31:55 devlabo kernel: [37819.617339]  [<ffffffffa009fe5f>] ?
> netvsc_channel_cb+0x37a/0x449 [hv_netvsc]
> Feb  3 22:31:55 devlabo kernel: [37819.617347]  [<ffffffffa006211b>] ?
> vmbus_on_event+0x91/0xdd [hv_vmbus]
> Feb  3 22:31:55 devlabo kernel: [37819.617353]  [<ffffffff8104b89a>] ?
> tasklet_action+0x73/0xc2
> Feb  3 22:31:55 devlabo kernel: [37819.617357]  [<ffffffff8104c084>] ?
> __do_softirq+0xb9/0x177
> Feb  3 22:31:55 devlabo kernel: [37819.617362]  [<ffffffff81061755>] ?
> run_posix_cpu_timers+0x23/0x346
> Feb  3 22:31:55 devlabo kernel: [37819.617366]  [<ffffffff8104c350>] ?
> raise_softirq_irqoff+0x6/0x25
> Feb  3 22:31:55 devlabo kernel: [37819.617372]  [<ffffffff8135426c>] ?
> call_softirq+0x1c/0x30
> Feb  3 22:31:55 devlabo kernel: [37819.617378]  [<ffffffff8100f8dd>] ?
> do_softirq+0x3c/0x7b
> Feb  3 22:31:55 devlabo kernel: [37819.617382]  [<ffffffff8104c2ec>] ?
> irq_exit+0x3c/0x9a
> Feb  3 22:31:55 devlabo kernel: [37819.617387]  [<ffffffff810241c8>] ?
> smp_apic_timer_interrupt+0x74/0x82
> Feb  3 22:31:55 devlabo kernel: [37819.617391]  [<ffffffff81352ade>] ?
> apic_timer_interrupt+0x6e/0x80
> Feb  3 22:31:55 devlabo kernel: [37819.617394]  <EOI>  [<ffffffff81013a17>] ?
> native_sched_clock+0x27/0x2f
> Feb  3 22:31:55 devlabo kernel: [37819.617402]  [<ffffffff8102b360>] ?
> native_safe_halt+0x2/0x3
> Feb  3 22:31:55 devlabo kernel: [37819.617407]  [<ffffffff81014508>] ?
> default_idle+0x47/0x7f
> Feb  3 22:31:55 devlabo kernel: [37819.617411]  [<ffffffff8100d24d>] ?
> cpu_idle+0xaf/0xf2
> Feb  3 22:31:55 devlabo kernel: [37819.617415]  [<ffffffff816abb33>] ?
> start_kernel+0x3b3/0x3be
> Feb  3 22:31:55 devlabo kernel: [37819.617420]  [<ffffffff816ab140>] ?
> early_idt_handlers+0x140/0x140
> Feb  3 22:31:55 devlabo kernel: [37819.617424]  [<ffffffff816ab3c4>] ?
> x86_64_start_kernel+0x104/0x111
> Feb  3 22:31:55 devlabo kernel: [37819.617427] ---[ end trace
> a20acc0adc92e993 ]---
> Feb  3 22:31:55 devlabo kernel: [37819.618127] hv_vmbus: child device
> vmbus_0_8 unregistered
> 
> It does not happen every day, but quite often : 4 times in February
> I'll ask my sysadm if there's something special at 22h30 in the host,
> because it's always happening around this time.
> 
> Machine is debian wheezy (7) under windows server 2008 R2

We will look into this. And further info around the time will also be helpful.

Thanks,
- Haiyang
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