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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CTG][BAT]gem_exec_suspend@basic-s3 incomplete on CI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100129#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CTG][BAT]gem_exec_suspend@basic-s3 incomplete on CI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100129">bug 100129</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>[ 254.327753] ===============================
[ 254.327753] [ ERR: suspicious RCU usage. ]
[ 254.327753] 4.10.0-CI-CI_DRM_2254+ #1 Not tainted
[ 254.327753] -------------------------------
[ 254.327753] kernel/workqueue.c:712 sched RCU or wq_pool_mutex should be
held!
[ 254.327753]
other info that might help us debug this:
[ 254.327753]
RCU used illegally from offline CPU!
rcu_scheduler_active = 2, debug_locks = 0
[ 254.327753] no locks held by swapper/1/0.
[ 254.327753]
stack backtrace:
[ 254.327753] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.10.0-CI-CI_DRM_2254+
#1
[ 254.327753] Hardware name: LENOVO 7465CTO/7465CTO, BIOS 6DET44WW (2.08 )
04/22/2009
[ 254.327753] Call Trace:
[ 254.327753] dump_stack+0x67/0x92
[ 254.327753] lockdep_rcu_suspicious+0xd7/0x110
[ 254.327753] get_work_pool+0xb1/0xc0
[ 254.327753] __queue_work+0x89/0x620
[ 254.327753] queue_work_on+0x33/0x70
[ 254.327753] clear_sched_clock_stable+0x33/0x40
[ 254.327753] early_init_intel+0x10a/0x310
[ 254.327753] init_intel+0x11/0x310
[ 254.327753] identify_cpu+0x309/0x520
[ 254.327753] identify_secondary_cpu+0x18/0x80
[ 254.327753] smp_store_cpu_info+0x3a/0x40
[ 254.327753] start_secondary+0x53/0x120
[ 254.327753] start_cpu+0x14/0x14
[ 254.337007] BUG: using smp_processor_id() in preemptible [00000000] code:
kworker/1:2/105
[ 254.337007] caller is debug_smp_processor_id+0x17/0x20
[ 254.337007] CPU: 0 PID: 105 Comm: kworker/1:2 Not tainted
4.10.0-CI-CI_DRM_2254+ #1
[ 254.337007] Disabled fast string operations
[ 254.337007] Hardware name: LENOVO 7465CTO/7465CTO, BIOS 6DET44WW (2.08 )
04/22/2009
[ 254.337007] Workqueue: events __clear_sched_clock_stable
[ 254.337007] Call Trace:
[ 254.337007] dump_stack+0x67/0x92
[ 254.337007] check_preemption_disabled+0xd7/0xe0
[ 254.337007] debug_smp_processor_id+0x17/0x20
[ 254.337007] __clear_sched_clock_stable+0x11/0x60
[ 254.337007] process_one_work+0x1f4/0x6d0
[ 254.337007] ? process_one_work+0x16e/0x6d0
[ 254.337007] worker_thread+0x49/0x4a0
[ 254.337007] kthread+0x107/0x140
[ 254.337007] ? process_one_work+0x6d0/0x6d0
[ 254.337007] ? kthread_create_on_node+0x40/0x40
[ 254.337007] ret_from_fork+0x2e/0x40
[ 254.337007] sched_clock: Marking unstable (254336007317,
-321214989128)<-(-66878981811, 0)
[ 254.758282] cache: parent cpu1 should not be sleeping</pre>
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