On Tue, Mar 18, 2014 at 11:35 AM, meenakshi aggarwal <meenu23688@gmail.com>wrote:
Hi,
On reboot my system is showing kernel stack trace as :
root@ds:~# reboot
INIT: Sending processes the TERM signal INIT Stopping Dropbear SSH server: stopped /usr/sbin/dropbear (pid 2152) dropbear. Stopping network benchmark server: netserverstopped /usr/sbin/netserver (pid 2157) . Stopping system log daemon...0 Stopping kernel log daemon...0 Deconfiguring network interfaces... done. Sending all processes the TERM signal... Sending all processes the KILL signal... Unmounting remote filesystems... Deactivating swap... Unmounting local filesystems... Rebooting... Disabling non-boot CPUs ...
BUG: scheduling while atomic: reboot/2210/0x00000002 Modules linked in: Preemption disabled at:[< (null)>] (null)
Call Trace: [ebe09b20] [c0007094] show_stack+0x44/0x150 (unreliable) [ebe09b60] [c064f5f4] __schedule_bug+0x84/0x9c [ebe09b70] [c064c1c0] __schedule+0x510/0x5e0 [ebe09c80] [c064aea4] schedule_timeout+0x164/0x1d0 [ebe09cc0] [c064bb10] wait_for_common+0xd0/0x1b0 [ebe09d00] [c004db58] kthread_create_on_node+0xa8/0x140 [ebe09d70] [c00a42cc] _cpu_down+0x1ec/0x4e0 [ebe09de0] [c002d8a0] disable_nonboot_cpus+0x90/0x160 [ebe09e10] [c004044c] kernel_restart+0x1c/0x90 [ebe09e20] [c004069c] sys_reboot+0x1cc/0x250 [ebe09f40] [c000efe0] ret_from_syscall+0x0/0x3c --- Exception: c01 at 0xff17684 LR = 0x10000c00 BUG: scheduling while atomic: reboot/2210/0x00000002
Looks Like some race condition.
Modules linked in: Preemption disabled at:[< (null)>] (null)
Call Trace: [ebe09b90] [c0007094] show_stack+0x44/0x150 (unreliable) [ebe09bd0] [c064f5f4] __schedule_bug+0x84/0x9c [ebe09be0] [c064c1c0] __schedule+0x510/0x5e0 [ebe09cf0] [c064aea4] schedule_timeout+0x164/0x1d0 [ebe09d30] [c064bb10] wait_for_common+0xd0/0x1b0 [ebe09d70] [c00a42f8] _cpu_down+0x218/0x4e0 [ebe09de0] [c002d8a0] disable_nonboot_cpus+0x90/0x160 [ebe09e10] [c004044c] kernel_restart+0x1c/0x90 [ebe09e20] [c004069c] sys_reboot+0x1cc/0x250 [ebe09f40] [c000efe0] ret_from_syscall+0x0/0x3c --- Exception: c01 at 0xff17684 LR = 0x10000c00
and so on.
Any kind of help will be appreciated.
Also i want to know the significance of *0x84/0x9c*
" __schedule_bug+*0x84/0x9c*"
This is offset(*0x84/0x9c*) from the function(__schedule_bug) where the next branching was done or call to a function was made. In this case at address " __schedule_bug+0x84/0x9c" function 'show_stack' was called.
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