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 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*"