BUG: scheduling while atomic: chcpu/6197/0x00000002

From: Thomas Sattler
Date: Mon Jun 18 2012 - 06:42:14 EST

Hi there ...

I run into the BUG by running 'chcpu --disable 1' on an "Intel(R)
Core(TM)2 CPU" machine. I used 3.4.2-rt10 and I seems not to
happen in vanilla 3.4.2.

I'll try 3.4.3 and 3.4.3-rt10 next and I'll send their results as
a reply to this mail.

(Please CC: me, I'm not on LKML)

Thanks
Thomas


[ 554.815919] BUG: scheduling while atomic: chcpu/6197/0x00000002
[ 554.815923] Modules linked in: loop rfcomm bnep btusb hid_microsoft
usbhid hid uhci_hcd ehci_hcd 3c59x mii e1000e sg usbcore usb_common
[ 554.815942] Pid: 6197, comm: chcpu Not tainted 3.4.2-rt10 #19
[ 554.815945] Call Trace:
[ 554.815953] [<c103df4d>] __schedule_bug+0x3d/0x42
[ 554.815958] [<c1355334>] __schedule+0x68/0x571
[ 554.815964] [<c1045844>] ? enqueue_entity+0x313/0x3d8
[ 554.815969] [<c13558e2>] schedule+0x60/0x70
[ 554.815972] [<c1354902>] schedule_timeout+0x17/0x160
[ 554.815977] [<c103ed57>] ? check_preempt_curr+0x29/0x64
[ 554.815981] [<c13551ed>] wait_for_common+0xa3/0xff
[ 554.815985] [<c10412e2>] ? try_to_wake_up+0x391/0x391
[ 554.815989] [<c13552ca>] wait_for_completion+0x12/0x14
[ 554.815993] [<c103781c>] kthread_create_on_node+0x71/0xb5
[ 554.815997] [<c102542c>] ? put_online_cpus+0x44/0x44
[ 554.816002] [<c1350101>] ? init_amd+0x56f/0x64f
[ 554.816007] [<c134719f>] _cpu_down+0x106/0x2b4
[ 554.816021] [<c102542c>] ? put_online_cpus+0x44/0x44
[ 554.816027] [<c1347372>] cpu_down+0x25/0x34
[ 554.816030] [<c13489b6>] store_online+0x29/0x70
[ 554.816034] [<c134898d>] ? acpi_processor_start+0xf7/0xf7
[ 554.816038] [<c127b037>] dev_attr_store+0x1b/0x23
[ 554.816043] [<c10eb6c6>] sysfs_write_file+0xae/0xe7
[ 554.816048] [<c10ab93e>] vfs_write+0x8c/0x122
[ 554.816052] [<c10eb618>] ? sysfs_poll+0x77/0x77
[ 554.816056] [<c10abb8f>] sys_write+0x3b/0x60
[ 554.816061] [<c1357823>] sysenter_do_call+0x12/0x2c
[ 554.817316] BUG: scheduling while atomic: chcpu/6197/0x00000002
[ 554.817319] Modules linked in: loop rfcomm bnep btusb hid_microsoft
usbhid hid uhci_hcd ehci_hcd 3c59x mii e1000e sg usbcore usb_common
[ 554.817335] Pid: 6197, comm: chcpu Not tainted 3.4.2-rt10 #19
[ 554.817337] Call Trace:
[ 554.817343] [<c103df4d>] __schedule_bug+0x3d/0x42
[ 554.817347] [<c1355334>] __schedule+0x68/0x571
[ 554.817351] [<c1356a61>] ? _raw_spin_unlock_irqrestore+0x1a/0x2f
[ 554.817356] [<c103a992>] ? __hrtimer_start_range_ns+0x2cf/0x2f6
[ 554.817360] [<c13558e2>] schedule+0x60/0x70
[ 554.817364] [<c1354dea>] schedule_hrtimeout_range_clock+0xc5/0xec
[ 554.817368] [<c103a202>] ? update_rmtp+0x68/0x68
[ 554.817372] [<c1354e1b>] schedule_hrtimeout_range+0xa/0xc
[ 554.817376] [<c1354e29>] schedule_hrtimeout+0xc/0xe
[ 554.817380] [<c103f197>] wait_task_inactive+0xc5/0xd6
[ 554.817385] [<c1037773>] kthread_bind+0x13/0x4b
[ 554.817389] [<c13471ba>] _cpu_down+0x121/0x2b4
[ 554.817394] [<c1347372>] cpu_down+0x25/0x34
[ 554.817397] [<c13489b6>] store_online+0x29/0x70
[ 554.817401] [<c134898d>] ? acpi_processor_start+0xf7/0xf7
[ 554.817405] [<c127b037>] dev_attr_store+0x1b/0x23
[ 554.817409] [<c10eb6c6>] sysfs_write_file+0xae/0xe7
[ 554.817413] [<c10ab93e>] vfs_write+0x8c/0x122
[ 554.817417] [<c10eb618>] ? sysfs_poll+0x77/0x77
[ 554.817421] [<c10abb8f>] sys_write+0x3b/0x60
[ 554.817425] [<c1357823>] sysenter_do_call+0x12/0x2c
[ 554.819134] BUG: scheduling while atomic: chcpu/6197/0x00000002
[ 554.819137] Modules linked in: loop rfcomm bnep btusb hid_microsoft
usbhid hid uhci_hcd ehci_hcd 3c59x mii e1000e sg usbcore usb_common
[ 554.819153] Pid: 6197, comm: chcpu Not tainted 3.4.2-rt10 #19
[ 554.819155] Call Trace:
[ 554.819160] [<c103df4d>] __schedule_bug+0x3d/0x42
[ 554.819164] [<c1355334>] __schedule+0x68/0x571
[ 554.819170] [<c1008017>] ? sched_clock+0x9/0xd
[ 554.819173] [<c10428f9>] ? sched_clock_local+0x11/0x12f
[ 554.819178] [<c13558e2>] schedule+0x60/0x70
[ 554.819182] [<c1354902>] schedule_timeout+0x17/0x160
[ 554.819186] [<c13551ed>] wait_for_common+0xa3/0xff
[ 554.819190] [<c10412e2>] ? try_to_wake_up+0x391/0x391
[ 554.819195] [<c13552ca>] wait_for_completion+0x12/0x14
[ 554.819199] [<c13471c9>] _cpu_down+0x130/0x2b4
[ 554.819203] [<c1347372>] cpu_down+0x25/0x34
[ 554.819207] [<c13489b6>] store_online+0x29/0x70
[ 554.819210] [<c134898d>] ? acpi_processor_start+0xf7/0xf7
[ 554.819214] [<c127b037>] dev_attr_store+0x1b/0x23
[ 554.819219] [<c10eb6c6>] sysfs_write_file+0xae/0xe7
[ 554.819223] [<c10ab93e>] vfs_write+0x8c/0x122
[ 554.819227] [<c10eb618>] ? sysfs_poll+0x77/0x77
[ 554.819230] [<c10abb8f>] sys_write+0x3b/0x60
[ 554.819235] [<c1357823>] sysenter_do_call+0x12/0x2c
[ 554.819269] BUG: scheduling while atomic: chcpu/6197/0x00000002
[ 554.819271] Modules linked in: loop rfcomm bnep btusb hid_microsoft
usbhid hid uhci_hcd ehci_hcd 3c59x mii e1000e sg usbcore usb_common
[ 554.819287] Pid: 6197, comm: chcpu Not tainted 3.4.2-rt10 #19
[ 554.819289] Call Trace:
[ 554.819293] [<c103df4d>] __schedule_bug+0x3d/0x42
[ 554.819297] [<c1355334>] __schedule+0x68/0x571
[ 554.819302] [<c1008017>] ? sched_clock+0x9/0xd
[ 554.819306] [<c10428f9>] ? sched_clock_local+0x11/0x12f
[ 554.819312] [<c13558e2>] schedule+0x60/0x70
[ 554.819316] [<c1354902>] schedule_timeout+0x17/0x160
[ 554.819320] [<c13551ed>] wait_for_common+0xa3/0xff
[ 554.819324] [<c10412e2>] ? try_to_wake_up+0x391/0x391
[ 554.819328] [<c13552ca>] wait_for_completion+0x12/0x14
[ 554.819332] [<c1037742>] kthread_stop+0x2d/0x4b
[ 554.819337] [<c10330fa>] destroy_worker+0x54/0x74
[ 554.819341] [<c1348d37>] workqueue_cpu_down_callback+0x193/0x251
[ 554.819346] [<c1185d3d>] ? compute_batch_value+0x19/0x29
[ 554.819350] [<c1353d1e>] ? percpu_counter_hotcpu_callback+0x13/0x8b
[ 554.819354] [<c103b6b9>] notifier_call_chain+0x26/0x48
[ 554.819358] [<c103b6fd>] __raw_notifier_call_chain+0xe/0x10
[ 554.819362] [<c1025331>] __cpu_notify+0x15/0x29
[ 554.819367] [<c13471f1>] _cpu_down+0x158/0x2b4
[ 554.819371] [<c1347372>] cpu_down+0x25/0x34
[ 554.819375] [<c13489b6>] store_online+0x29/0x70
[ 554.819378] [<c134898d>] ? acpi_processor_start+0xf7/0xf7
[ 554.819382] [<c127b037>] dev_attr_store+0x1b/0x23
[ 554.819386] [<c10eb6c6>] sysfs_write_file+0xae/0xe7
[ 554.819390] [<c10ab93e>] vfs_write+0x8c/0x122
[ 554.819394] [<c10eb618>] ? sysfs_poll+0x77/0x77
[ 554.819398] [<c10abb8f>] sys_write+0x3b/0x60
[ 554.819402] [<c1357823>] sysenter_do_call+0x12/0x2c
[ 554.819421] BUG: scheduling while atomic: chcpu/6197/0x00000002
[ 554.819424] Modules linked in: loop rfcomm bnep btusb hid_microsoft
usbhid hid uhci_hcd ehci_hcd 3c59x mii e1000e sg usbcore usb_common
[ 554.819439] Pid: 6197, comm: chcpu Not tainted 3.4.2-rt10 #19
[ 554.819442] Call Trace:
[ 554.819446] [<c103df4d>] __schedule_bug+0x3d/0x42
[ 554.819450] [<c1355334>] __schedule+0x68/0x571
[ 554.819455] [<c1008017>] ? sched_clock+0x9/0xd
[ 554.819459] [<c10428f9>] ? sched_clock_local+0x11/0x12f
[ 554.819463] [<c13558e2>] schedule+0x60/0x70
[ 554.819466] [<c1354902>] schedule_timeout+0x17/0x160
[ 554.819471] [<c13551ed>] wait_for_common+0xa3/0xff
[ 554.819475] [<c10412e2>] ? try_to_wake_up+0x391/0x391
[ 554.819478] [<c13552ca>] wait_for_completion+0x12/0x14
[ 554.819482] [<c1037742>] kthread_stop+0x2d/0x4b
[ 554.819486] [<c10330fa>] destroy_worker+0x54/0x74
[ 554.819491] [<c1348d37>] workqueue_cpu_down_callback+0x193/0x251
[ 554.819495] [<c1185d3d>] ? compute_batch_value+0x19/0x29
[ 554.819499] [<c1353d1e>] ? percpu_counter_hotcpu_callback+0x13/0x8b
[ 554.819504] [<c103b6b9>] notifier_call_chain+0x26/0x48
[ 554.819508] [<c103b6fd>] __raw_notifier_call_chain+0xe/0x10
[ 554.819512] [<c1025331>] __cpu_notify+0x15/0x29
[ 554.819516] [<c13471f1>] _cpu_down+0x158/0x2b4
[ 554.819521] [<c1347372>] cpu_down+0x25/0x34
[ 554.819524] [<c13489b6>] store_online+0x29/0x70
[ 554.819528] [<c134898d>] ? acpi_processor_start+0xf7/0xf7
[ 554.819532] [<c127b037>] dev_attr_store+0x1b/0x23
[ 554.819536] [<c10eb6c6>] sysfs_write_file+0xae/0xe7
[ 554.819540] [<c10ab93e>] vfs_write+0x8c/0x122
[ 554.819544] [<c10eb618>] ? sysfs_poll+0x77/0x77
[ 554.819548] [<c10abb8f>] sys_write+0x3b/0x60
[ 554.819552] [<c1357823>] sysenter_do_call+0x12/0x2c
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