Greetings, I got the below dmesg and the first bad commit is commit 3ab098df35f8b98b6553edc2e40234af512ba877 Author: Jason Wang Date: Tue Oct 15 11:18:58 2013 +0800 virtio-net: don't respond to cpu hotplug notifier if we're not ready We're trying to re-configure the affinity unconditionally in cpu hotplug callback. This may lead the issue during resuming from s3/s4 since - virt queues haven't been allocated at that time. - it's unnecessary since thaw method will re-configure the affinity. Fix this issue by checking the config_enable and do nothing is we're not ready. The bug were introduced by commit 8de4b2f3ae90c8fc0f17eeaab87d5a951b66ee17 (virtio-net: reset virtqueue affinity when doing cpu hotplug). Cc: Rusty Russell Cc: Michael S. Tsirkin Cc: Wanlong Gao Acked-by: Michael S. Tsirkin Reviewed-by: Wanlong Gao Signed-off-by: Jason Wang Signed-off-by: David S. Miller [ 622.944441] CPU0 attaching NULL sched-domain. [ 622.944446] CPU1 attaching NULL sched-domain. [ 622.944485] CPU0 attaching NULL sched-domain. [ 622.950795] BUG: sleeping function called from invalid context at kernel/mutex.c:616 [ 622.950796] in_atomic(): 1, irqs_disabled(): 1, pid: 10, name: migration/1 [ 622.950796] no locks held by migration/1/10. [ 622.950798] CPU: 1 PID: 10 Comm: migration/1 Not tainted 3.12.0-rc5-wl-01249-gb91e82d #317 [ 622.950799] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 622.950802] 0000000000000000 ffff88001d42dba0 ffffffff81a32f22 ffff88001bfb9c70 [ 622.950803] ffff88001d42dbb0 ffffffff810edb02 ffff88001d42dc38 ffffffff81a396ed [ 622.950805] 0000000000000046 ffff88001d42dbe8 ffffffff810e861d 0000000000000000 [ 622.950805] Call Trace: [ 622.950810] [] dump_stack+0x54/0x74 [ 622.950815] [] __might_sleep+0x112/0x114 [ 622.950817] [] mutex_lock_nested+0x3c/0x3c6 [ 622.950818] [] ? up+0x39/0x3e [ 622.950821] [] ? acpi_os_signal_semaphore+0x21/0x2d [ 622.950824] [] ? acpi_ut_release_mutex+0x5e/0x62 [ 622.950828] [] virtnet_cpu_callback+0x33/0x87 [ 622.950830] [] notifier_call_chain+0x3c/0x5e [ 622.950832] [] __raw_notifier_call_chain+0xe/0x10 [ 622.950835] [] __cpu_notify+0x20/0x37 [ 622.950836] [] cpu_notify+0x13/0x15 [ 622.950838] [] take_cpu_down+0x27/0x3a [ 622.950841] [] stop_machine_cpu_stop+0x93/0xf1 [ 622.950842] [] cpu_stopper_thread+0xa0/0x12f [ 622.950844] [] ? cpu_stopper_thread+0x12f/0x12f [ 622.950847] [] ? lock_release_holdtime.part.7+0xa3/0xa8 [ 622.950848] [] ? cpu_stop_should_run+0x3f/0x47 [ 622.950850] [] smpboot_thread_fn+0x1c5/0x1e3 [ 622.950852] [] ? lg_global_unlock+0x67/0x67 [ 622.950854] [] kthread+0xd8/0xe0 [ 622.950857] [] ? wait_for_common+0x12f/0x164 [ 622.950859] [] ? kthread_create_on_node+0x124/0x124 [ 622.950861] [] ret_from_fork+0x7c/0xb0 [ 622.950862] [] ? kthread_create_on_node+0x124/0x124 [ 622.950876] smpboot: CPU 1 is now offline [ 623.194556] SMP alternatives: lockdep: fixing up alternatives [ 623.194559] smpboot: Booting Node 0 Processor 1 APIC 0x1 git bisect start b91e82dc6ad55f2d39b92e731c6bb95cc44a923c 61e6cfa80de5760bbe406f4e815b7739205754d2 -- git bisect good a1b13b9ad3759dca24c6b721ee026c540a4e6564 # 21:47 20+ 2 rt2x00: rt2800pci: use module_pci_driver macro git bisect good fd1b6d51e114be121460a07e9ccb2005928d0c88 # 22:38 20+ 0 Merge branch 'pm-cpufreq-next' into linux-next git bisect good 11ec23f2c0874676a3321d304d2a03e2c46dc680 # 23:13 20+ 4 Merge 'shawnguo/for-next' into devel-inn-x86_64-201310190634 git bisect good e358784297992b012e8071764d996191dd2b1a54 # 00:19 20+ 1 can: flexcan: fix mx28 detection by rearanging OF match table git bisect bad 2b13d06c9584b4eb773f1e80bbaedab9a1c344e1 # 00:35 0- 6 wanxl: fix info leak in ioctl git bisect good 725907827a7f46dfb5df6e4f3d8f9bcbc9903877 # 01:29 20+ 2 Merge branch 'sctp_csum' git bisect bad ce97fef4235378108ed3bd96e1b3eab8fd0a1fbd # 01:54 0- 17 net: qmi_wwan: Olivetti Olicard 200 support git bisect good dbbd2ad89bb1f86b94b23bb2e56d4935717f9b94 # 02:44 20+ 1 net/ethernet: cpsw: Bugfix interrupts before enabling napi git bisect good 39bb93f88c5db54cbe1df0b0aa957b3a8f2227ed # 03:11 20+ 3 yam: remove a no-op in yam_ioctl() git bisect bad 35ed159bfd96a7547ec277ed8b550c7cbd9841b6 # 03:22 0- 1 virtio-net: refill only when device is up during setting queues git bisect bad 3ab098df35f8b98b6553edc2e40234af512ba877 # 03:39 0- 9 virtio-net: don't respond to cpu hotplug notifier if we're not ready git bisect good 39bb93f88c5db54cbe1df0b0aa957b3a8f2227ed # 04:52 60+ 7 yam: remove a no-op in yam_ioctl() git bisect bad b91e82dc6ad55f2d39b92e731c6bb95cc44a923c # 04:53 0- 18 Merge 'lunn/v3.12-rc5-rafael-next-dove-cpufreq' into devel-inn-x86_64-201310190634 git bisect good bc823919e42bc7a31ee06fa040194db6f455c2e3 # 06:04 60+ 8 Revert "virtio-net: don't respond to cpu hotplug notifier if we're not ready" git bisect good 31d141e3a666269a3b6fcccddb0351caf7454240 # 07:11 60+ 12 Linux 3.12-rc6 git bisect good a0cf1abc25ac197dd97b857c0f6341066a8cb1cf # 08:10 60+ 10 Add linux-next specific files for 20130927 Thanks, Fengguang