From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grygorii Strashko Subject: [v4.14-rt][report] arm: just another rcu_note_context_switch Date: Wed, 14 Feb 2018 16:12:42 -0600 Message-ID: <6f2e005d-26c1-19ca-283a-5f5e441e2f80@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: LKML To: Steven Rostedt , linux-rt-users , Sebastian Andrzej Siewior Return-path: Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org Hi All, I can see below warning during boot on few TI boards am437x-idk, am335x-evm, am335x-ice All of them are non-SMP [ 1.229376] NET: Registered protocol family 10 [ 1.235443] ------------[ cut here ]------------ [ 1.235489] WARNING: CPU: 0 PID: 18 at kernel/rcu/tree_plugin.h:310 rcu_note_context_switch+0x1b4/0x528 [ 1.235494] Modules linked in: [ 1.235514] CPU: 0 PID: 18 Comm: kworker/0:1 Not tainted 4.14.19-rt15-177004-gd5e1859 #3 [ 1.235518] Hardware name: Generic AM33XX (Flattened Device Tree) [ 1.235539] Workqueue: ipv6_addrconf addrconf_verify_work [ 1.235544] Backtrace: [ 1.235577] [] (dump_backtrace) from [] (show_stack+0x18/0x1c) [ 1.235588] r7:00000009 r6:00000000 r5:c098d728 r4:00000000 [ 1.235602] [] (show_stack) from [] (dump_stack+0x24/0x28) [ 1.235620] [] (dump_stack) from [] (__warn+0xe8/0x100) [ 1.235631] [] (__warn) from [] (warn_slowpath_null+0x28/0x30) [ 1.235642] r9:00000000 r8:a0000013 r7:ffffe000 r6:00000000 r5:cf063800 r4:c0c18380 [ 1.235654] [] (warn_slowpath_null) from [] (rcu_note_context_switch+0x1b4/0x528) [ 1.235672] [] (rcu_note_context_switch) from [] (__schedule+0x7c/0x64c) [ 1.235682] r10:cf108000 r9:00000000 r8:a0000013 r7:ffffe000 r6:c0c12b10 r5:00000000 [ 1.235687] r4:cf063800 r3:001eab3b [ 1.235698] [] (__schedule) from [] (schedule+0x60/0xf8) [ 1.235708] r10:cf108000 r9:00000000 r8:a0000013 r7:cf109df0 r6:cf063800 r5:cf063800 [ 1.235712] r4:cf108000 [ 1.235726] [] (schedule) from [] (rt_spin_lock_slowlock_locked+0x130/0x250) [ 1.235731] r5:c0c12000 r4:cf108000 [ 1.235742] [] (rt_spin_lock_slowlock_locked) from [] (rt_spin_lock_slowlock+0x5c/0xa8) [ 1.235752] r9:00000000 r8:00000001 r7:cf109e74 r6:c0c4ec18 r5:a0000013 r4:ffffe000 [ 1.235767] [] (rt_spin_lock_slowlock) from [] (rt_spin_lock+0x48/0x4c) [ 1.235772] r5:ffffe000 r4:c0c11c94 [ 1.235788] [] (rt_spin_lock) from [] (try_to_grab_pending+0x50/0x20c) [ 1.235798] [] (try_to_grab_pending) from [] (__cancel_work+0x28/0xa0) [ 1.235808] r9:00000000 r8:cfd82300 r7:00000000 r6:00000001 r5:c0c4ec18 r4:c0c18640 [ 1.235819] [] (__cancel_work) from [] (cancel_delayed_work+0x14/0x18) [ 1.235826] r6:51eb851f r5:ffffba7c r4:c0c18640 [ 1.235837] [] (cancel_delayed_work) from [] (addrconf_verify_rtnl+0x84/0x448) [ 1.235847] [] (addrconf_verify_rtnl) from [] (addrconf_verify_work+0x14/0x1c) [ 1.235857] r10:cf108000 r9:00000000 r8:cfd82300 r7:00000000 r6:c0c11c94 r5:cf0eff80 [ 1.235861] r4:c0c4ec18 [ 1.235871] [] (addrconf_verify_work) from [] (process_one_work+0x1b4/0x3e8) [ 1.235881] [] (process_one_work) from [] (worker_thread+0x58/0x5e0) [ 1.235891] r10:cf108000 r9:c0c11cbc r8:c0c18640 r7:00000008 r6:cf0eff98 r5:c0c11c94 [ 1.235895] r4:cf0eff80 [ 1.235912] [] (worker_thread) from [] (kthread+0x130/0x160) [ 1.235922] r10:cf04de94 r9:cf104198 r8:cf0eff80 r7:cf108000 r6:cf0ff100 r5:00000000 [ 1.235926] r4:cf104180 [ 1.235937] [] (kthread) from [] (ret_from_fork+0x14/0x24) [ 1.235947] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c0145c3c [ 1.235951] r4:cf0ff100 [ 1.235955] ---[ end trace 0000000000000001 ]---