* Grygorii Strashko | 2015-08-12 21:25:50 [+0300]: >Hi All, > >I can constantly see below error report with RT-kernel on TI ARM dra7-evm >if I'm trying to do Suspend to RAM. do you see the same problem on x86 with -RT? > Disabling non-boot CPUs ... > PM: noirq suspend of devices complete after 7.295 msecs >[ 100.285729] Disabling non-boot CPUs ... >[ 100.287575] BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917 >[ 100.287580] in_atomic(): 1, irqs_disabled(): 128, pid: 18, name: migration/1 >[ 100.287583] INFO: lockdep is turned off. >[ 100.287586] irq event stamp: 122 >[ 100.287600] hardirqs last enabled at (121): [<c06ac0ac>] _raw_spin_unlock_irqrestore+0x88/0x90 >[ 100.287609] hardirqs last disabled at (122): [<c06abed0>] _raw_spin_lock_irq+0x28/0x5c >[ 100.287620] softirqs last enabled at (0): [<c003d294>] copy_process.part.52+0x410/0x19d8 >[ 100.287625] softirqs last disabled at (0): [< (null)>] (null) >[ 100.287630] Preemption disabled at:[< (null)>] (null) >[ 100.287631] >[ 100.287639] CPU: 1 PID: 18 Comm: migration/1 Tainted: G W 4.1.4-rt3-01046-g96ac8da #204 >[ 100.287642] Hardware name: Generic DRA74X (Flattened Device Tree) >[ 100.287659] [<c0019134>] (unwind_backtrace) from [<c0014774>] (show_stack+0x20/0x24) >[ 100.287671] [<c0014774>] (show_stack) from [<c06a70f4>] (dump_stack+0x88/0xdc) >[ 100.287681] [<c06a70f4>] (dump_stack) from [<c006cab8>] (___might_sleep+0x198/0x2a8) >[ 100.287689] [<c006cab8>] (___might_sleep) from [<c06ac4dc>] (rt_spin_lock+0x30/0x70) >[ 100.287699] [<c06ac4dc>] (rt_spin_lock) from [<c013f790>] (find_lock_task_mm+0x9c/0x174) this is task_lock() which takes a sleeping lock. >[ 100.287710] [<c013f790>] (find_lock_task_mm) from [<c00409ac>] (clear_tasks_mm_cpumask+0xb4/0x1ac) >[ 100.287720] [<c00409ac>] (clear_tasks_mm_cpumask) from [<c00166a4>] (__cpu_disable+0x98/0xbc) >[ 100.287728] [<c00166a4>] (__cpu_disable) from [<c06a2e8c>] (take_cpu_down+0x1c/0x50) >[ 100.287742] [<c06a2e8c>] (take_cpu_down) from [<c00f2600>] (multi_cpu_stop+0x11c/0x158) >[ 100.287754] [<c00f2600>] (multi_cpu_stop) from [<c00f2a9c>] (cpu_stopper_thread+0xc4/0x184) this function contains local_save_flags(). >[ 100.287767] [<c00f2a9c>] (cpu_stopper_thread) from [<c0069058>] (smpboot_thread_fn+0x18c/0x324) >[ 100.287779] [<c0069058>] (smpboot_thread_fn) from [<c00649c4>] (kthread+0xe8/0x104) >[ 100.287791] [<c00649c4>] (kthread) from [<c0010058>] (ret_from_fork+0x14/0x3c) >[ 100.288114] CPU1: shutdown The local_save_flags() should be probably replaced with something else. >regards, >-grygorii Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
