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rk3308b kernel4.4 preempt-rt #266
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Kwiboo
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Oct 23, 2023
Add various tests to check maximum number of supported programs being attached: # ./vmtest.sh -- ./test_progs -t tc_opts [...] ./test_progs -t tc_opts [ 1.185325] bpf_testmod: loading out-of-tree module taints kernel. [ 1.186826] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel [ 1.270123] tsc: Refined TSC clocksource calibration: 3407.988 MHz [ 1.272428] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fc932722, max_idle_ns: 440795381586 ns [ 1.276408] clocksource: Switched to clocksource tsc rockchip-linux#252 tc_opts_after:OK rockchip-linux#253 tc_opts_append:OK rockchip-linux#254 tc_opts_basic:OK rockchip-linux#255 tc_opts_before:OK rockchip-linux#256 tc_opts_chain_classic:OK rockchip-linux#257 tc_opts_chain_mixed:OK rockchip-linux#258 tc_opts_delete_empty:OK rockchip-linux#259 tc_opts_demixed:OK rockchip-linux#260 tc_opts_detach:OK rockchip-linux#261 tc_opts_detach_after:OK rockchip-linux#262 tc_opts_detach_before:OK rockchip-linux#263 tc_opts_dev_cleanup:OK rockchip-linux#264 tc_opts_invalid:OK rockchip-linux#265 tc_opts_max:OK <--- (new test) rockchip-linux#266 tc_opts_mixed:OK rockchip-linux#267 tc_opts_prepend:OK rockchip-linux#268 tc_opts_replace:OK rockchip-linux#269 tc_opts_revision:OK Summary: 18/0 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20230929204121.20305-2-daniel@iogearbox.net
Kwiboo
pushed a commit
to Kwiboo/linux-rockchip
that referenced
this issue
Oct 23, 2023
Add a new test case which performs double query of the bpf_mprog through libbpf API, but also via raw bpf(2) syscall. This is testing to gather first the count and then in a subsequent probe the full information with the program array without clearing passed structs in between. # ./vmtest.sh -- ./test_progs -t tc_opts [...] ./test_progs -t tc_opts [ 1.398818] tsc: Refined TSC clocksource calibration: 3407.999 MHz [ 1.400263] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fd336761, max_idle_ns: 440795243819 ns [ 1.402734] clocksource: Switched to clocksource tsc [ 1.426639] bpf_testmod: loading out-of-tree module taints kernel. [ 1.428112] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel rockchip-linux#252 tc_opts_after:OK rockchip-linux#253 tc_opts_append:OK rockchip-linux#254 tc_opts_basic:OK rockchip-linux#255 tc_opts_before:OK rockchip-linux#256 tc_opts_chain_classic:OK rockchip-linux#257 tc_opts_chain_mixed:OK rockchip-linux#258 tc_opts_delete_empty:OK rockchip-linux#259 tc_opts_demixed:OK rockchip-linux#260 tc_opts_detach:OK rockchip-linux#261 tc_opts_detach_after:OK rockchip-linux#262 tc_opts_detach_before:OK rockchip-linux#263 tc_opts_dev_cleanup:OK rockchip-linux#264 tc_opts_invalid:OK rockchip-linux#265 tc_opts_max:OK rockchip-linux#266 tc_opts_mixed:OK rockchip-linux#267 tc_opts_prepend:OK rockchip-linux#268 tc_opts_query:OK <--- (new test) rockchip-linux#269 tc_opts_replace:OK rockchip-linux#270 tc_opts_revision:OK Summary: 19/0 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/r/20231006220655.1653-4-daniel@iogearbox.net Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Kwiboo
pushed a commit
to Kwiboo/linux-rockchip
that referenced
this issue
Oct 23, 2023
Add a new test case to query on an empty bpf_mprog and pass the revision directly into expected_revision for attachment to assert that this does succeed. ./test_progs -t tc_opts [ 1.406778] tsc: Refined TSC clocksource calibration: 3407.990 MHz [ 1.408863] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fcaf6eb0, max_idle_ns: 440795321766 ns [ 1.412419] clocksource: Switched to clocksource tsc [ 1.428671] bpf_testmod: loading out-of-tree module taints kernel. [ 1.430260] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel rockchip-linux#252 tc_opts_after:OK rockchip-linux#253 tc_opts_append:OK rockchip-linux#254 tc_opts_basic:OK rockchip-linux#255 tc_opts_before:OK rockchip-linux#256 tc_opts_chain_classic:OK rockchip-linux#257 tc_opts_chain_mixed:OK rockchip-linux#258 tc_opts_delete_empty:OK rockchip-linux#259 tc_opts_demixed:OK rockchip-linux#260 tc_opts_detach:OK rockchip-linux#261 tc_opts_detach_after:OK rockchip-linux#262 tc_opts_detach_before:OK rockchip-linux#263 tc_opts_dev_cleanup:OK rockchip-linux#264 tc_opts_invalid:OK rockchip-linux#265 tc_opts_max:OK rockchip-linux#266 tc_opts_mixed:OK rockchip-linux#267 tc_opts_prepend:OK rockchip-linux#268 tc_opts_query:OK rockchip-linux#269 tc_opts_query_attach:OK <--- (new test) rockchip-linux#270 tc_opts_replace:OK rockchip-linux#271 tc_opts_revision:OK Summary: 20/0 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/r/20231006220655.1653-6-daniel@iogearbox.net Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
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INIT: version 2.90 booting
[ 2.985859] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 2.985866] Modules linked in:
[ 2.985885] Preemption disabled at:[] schedule_preempt_disabled+0x15/0x16
[ 2.985886]
[ 2.985894] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.144-rt161 #1
[ 2.985897] Hardware name: Generic DT based system
[ 2.985922] [] (unwind_backtrace) from [] (show_stack+0xb/0xc)
[ 2.985936] [] (show_stack) from [] (dump_stack+0x51/0x68)
[ 2.985949] [] (dump_stack) from [] (__schedule_bug+0x55/0x7c)
[ 2.985962] [] (__schedule_bug) from [] (__schedule+0x4d/0x26c)
[ 2.985976] [] (__schedule) from [] (schedule+0x63/0x88)
[ 2.985987] [] (schedule) from [] (rt_spin_lock_slowlock+0xff/0x1f4)
[ 2.986003] [] (rt_spin_lock_slowlock) from [] (choose_freq+0x2f/0xe4)
[ 2.986016] [] (choose_freq) from [] (cpufreq_interactive_timer+0x153/0x240)
[ 2.986028] [] (cpufreq_interactive_timer) from [] (cpufreq_interactive_idle_notifier+0x5f/0x6c)
[ 2.986041] [] (cpufreq_interactive_idle_notifier) from [] (notifier_call_chain+0x27/0x38)
[ 2.986055] [] (notifier_call_chain) from [] (__atomic_notifier_call_chain+0x21/0x2c)
[ 2.986068] [] (__atomic_notifier_call_chain) from [] (atomic_notifier_call_chain+0xf/0x14)
[ 2.986082] [] (atomic_notifier_call_chain) from [] (cpu_startup_entry+0xd1/0x126)
[ 2.986094] [] (cpu_startup_entry) from [] (start_kernel+0x273/0x2e0)
[ 2.986127] ------------[ cut here ]------------
[ 3.140502] WARNING: CPU: 0 PID: 0 at kernel/sched/core.c:3352 migrate_enable+0x39/0x270()
[ 3.140512] Modules linked in:
[ 3.140522] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.4.144-rt161 #1
[ 3.140525] Hardware name: Generic DT based system
[ 3.140547] [] (unwind_backtrace) from [] (show_stack+0xb/0xc)
[ 3.140562] [] (show_stack) from [] (dump_stack+0x51/0x68)
[ 3.140578] [] (dump_stack) from [] (warn_slowpath_common+0x55/0x7c)
[ 3.140592] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
[ 3.140603] [] (warn_slowpath_null) from [] (migrate_enable+0x39/0x270)
[ 3.140617] [] (migrate_enable) from [] (cpufreq_interactive_timer+0x145/0x240)
** 152 printk messages dropped ** [ 3.144227] [] (dump_stack) from [] (warn_slowpath_common+0x55/0x7c)
** 221 printk messages dropped ** [ 3.150972] [] (run_ksoftirqd) from [] (smpboot_thread_fn+0x17b/0x190)
** 204 printk messages dropped ** [ 3.157019] Modules linked in:
** 120 printk messages dropped ** [ 3.160245] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 3.170929] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 220 printk messages dropped ** [ 3.182928] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 219 printk messages dropped ** [ 3.192914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 3.204917] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 237 printk messages dropped ** [ 3.216916] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 210 printk messages dropped ** [ 3.227989] [] (kthread) from [] (ret_from_fork+0x11/0x1c)
** 213 printk messages dropped ** [ 3.239917] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 203 printk messages dropped ** [ 3.249912] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 237 printk messages dropped ** [ 3.262915] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 219 printk messages dropped ** [ 3.273899] [] (dump_stack) from [] (warn_slowpath_common+0x55/0x7c)
** 204 printk messages dropped ** [ 3.284072] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 3.295916] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 237 printk messages dropped ** [ 3.307916] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 227 printk messages dropped ** [ 3.319989] [] (kthread) from [] (ret_from_fork+0x11/0x1c)
** 196 printk messages dropped ** [ 3.329914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 203 printk messages dropped ** [ 3.340918] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 238 printk messages dropped ** [ 3.352926] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 203 printk messages dropped ** [ 3.363929] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 237 printk messages dropped ** [ 3.376099] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 203 printk messages dropped ** [ 3.385928] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 237 printk messages dropped ** [ 3.398924] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 333 printk messages dropped ** [ 3.416035] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G W 4.4.144-rt161 #1
** 1133 printk messages dropped ** [ 3.474989] [] (kthread) from [] (ret_from_fork+0x11/0x1c)
** 1069 printk messages dropped ** [ 3.498627] CPU: 0 PID: 43 Comm: kworker/0:1 Tainted: G W 4.4.144-rt161 #1
** 1121 printk messages dropped ** [ 3.509655] [] (usb_remove_ep_devs) from [] (remove_intf_ep_devs+0x2d/0x2e)
** 1187 printk messages dropped ** [ 3.521250] [] (sysfs_remove_group) from [] (sysfs_remove_groups+0x17/0x18)
** 1177 printk messages dropped ** [ 3.532724] [] (usb_disconnect) from [] (hub_event+0x42b/0xa80)
** 1093 printk messages dropped ** [ 3.543481] [] (kthread) from [] (ret_from_fork+0x11/0x1c)
** 671 printk messages dropped ** [ 3.550059] [] (show_stack) from [] (dump_stack+0x51/0x68)
** 182 printk messages dropped ** [ 3.551870] Hardware name: Generic DT based system
** 149 printk messages dropped ** [ 3.553344] [] (migrate_enable) from [] (kernfs_put+0x9d/0x120)
** 396 printk messages dropped ** [ 3.557266] [] (device_del) from [] (usb_disconnect+0xab/0x128)
** 200 printk messages dropped ** [ 3.559258] [] (klist_remove) from [] (__device_release_driver+0x73/0x8e)
** 379 printk messages dropped ** [ 3.562977] Modules linked in:
** 159 printk messages dropped ** [ 3.564898] [] (show_stack) from [] (dump_stack+0x51/0x68)
** 190 printk messages dropped ** [ 3.573939] [] (unpin_current_cpu) from [] (migrate_enable+0x1f1/0x270)
** 301 printk messages dropped ** [ 3.589893] [] (show_stack) from [] (dump_stack+0x51/0x68)
** 300 printk messages dropped ** [ 3.594889] [] (show_stack) from [] (dump_stack+0x51/0x68)
** 187 printk messages dropped ** [ 3.604902] [] (dump_stack) from [] (warn_slowpath_common+0x55/0x7c)
** 605 printk messages dropped ** [ 3.625891] [] (show_stack) from [] (dump_stack+0x51/0x68)
** 992 printk messages dropped ** [ 3.668853] WARNING: CPU: 0 PID: 4 at kernel/cpu.c:198 unpin_current_cpu+0x1f/0x50()
** 683 printk messages dropped ** [ 3.679482] [] (usb_runtime_idle) from [] (__rpm_callback+0x15/0x20)
** 574 printk messages dropped ** [ 3.685121] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 665 printk messages dropped ** [ 3.692505] ---[ end trace 00000000000003c6 ]---
** 153 printk messages dropped ** [ 3.694002] [] (usb_runtime_idle) from [] (__rpm_callback+0x15/0x20)
** 221 printk messages dropped ** [ 3.703102] [] (unpin_current_cpu) from [] (migrate_enable+0x1f1/0x270)
** 197 printk messages dropped ** [ 3.705530] [] (pm_runtime_work) from [] (process_one_work+0x117/0x204)
** 223 printk messages dropped ** [ 3.707614] [] (show_stack) from [] (dump_stack+0x51/0x68)
** 200 printk messages dropped ** [ 3.713942] [] (unpin_current_cpu) from [] (migrate_enable+0x1f1/0x270)
** 199 printk messages dropped ** [ 3.718325] [] (__pm_runtime_suspend) from [] (usb_runtime_idle+0x15/0x1a)
** 312 printk messages dropped ** [ 3.721324] ------------[ cut here ]------------
** 137 printk messages dropped ** [ 3.724856] Modules linked in:
** 118 printk messages dropped ** [ 3.731030] Modules linked in:
** 118 printk messages dropped ** [ 3.737856] Modules linked in:
** 101 printk messages dropped ** [ 3.742855] Modules linked in:
** 118 printk messages dropped ** [ 3.748856] Modules linked in:
** 118 printk messages dropped ** [ 3.755031] Modules linked in:
** 118 printk messages dropped ** [ 3.761858] Modules linked in:
** 101 printk messages dropped ** [ 3.766857] Modules linked in:
** 118 printk messages dropped ** [ 3.772856] Modules linked in:
** 118 printk messages dropped ** [ 3.779030] Modules linked in:
** 118 printk messages dropped ** [ 3.785018] Modules linked in:
** 102 printk messages dropped ** [ 3.788042] [] (unwind_backtrace) from [] (show_stack+0xb/0xc)
** 221 printk messages dropped ** [ 3.797926] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 203 printk messages dropped ** [ 3.807929] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 220 printk messages dropped ** [ 3.819927] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 220 printk messages dropped ** [ 3.831106] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 212 printk messages dropped ** [ 3.842853] WARNING: CPU: 0 PID: 4 at kernel/cpu.c:198 unpin_current_cpu+0x1f/0x50()
** 210 printk messages dropped ** [ 3.853914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 3.864914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 224 printk messages dropped ** [ 3.876961] [] (do_current_softirqs) from [] (run_ksoftirqd+0x1b/0x40)
** 216 printk messages dropped ** [ 3.887915] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 203 printk messages dropped ** [ 3.898914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 237 printk messages dropped ** [ 3.911079] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 3.922916] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 3.934918] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 221 printk messages dropped ** [ 3.945923] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 220 printk messages dropped ** [ 3.957926] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 237 printk messages dropped ** [ 3.969928] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 203 printk messages dropped ** [ 3.980934] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 228 printk messages dropped ** [ 3.992844] ------------[ cut here ]------------
** 127 printk messages dropped ** [ 3.999098] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 237 printk messages dropped ** [ 4.011926] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 202 printk messages dropped ** [ 4.022919] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 237 printk messages dropped ** [ 4.034918] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 205 printk messages dropped ** [ 4.044934] [] (unpin_current_cpu) from [] (migrate_enable+0x1f1/0x270)
** 235 printk messages dropped ** [ 4.057915] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 203 printk messages dropped ** [ 4.067919] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 237 printk messages dropped ** [ 4.080921] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.091914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 203 printk messages dropped ** [ 4.102914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 237 printk messages dropped ** [ 4.115085] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 215 printk messages dropped ** [ 4.126863] CPU: 0 PID: 4 Comm: ktimersoftd/0 Tainted: G W 4.4.144-rt161 #1
** 224 printk messages dropped ** [ 4.138902] [] (dump_stack) from [] (warn_slowpath_common+0x55/0x7c)
** 204 printk messages dropped ** [ 4.148913] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.160918] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.171915] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 209 printk messages dropped ** [ 4.182980] [] (smpboot_thread_fn) from [] (kthread+0x89/0x98)
** 214 printk messages dropped ** [ 4.194919] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.205913] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.217913] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.228913] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 232 printk messages dropped ** [ 4.241862] CPU: 0 PID: 4 Comm: ktimersoftd/0 Tainted: G W 4.4.144-rt161 #1
** 207 printk messages dropped ** [ 4.251903] [] (dump_stack) from [] (warn_slowpath_common+0x55/0x7c)
** 204 printk messages dropped ** [ 4.262912] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.274916] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 220 printk messages dropped ** [ 4.285914] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 226 printk messages dropped ** [ 4.297978] [] (smpboot_thread_fn) from [] (kthread+0x89/0x98)
** 197 printk messages dropped ** [ 4.307913] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 225 printk messages dropped ** [ 4.319967] [] (run_ksoftirqd) from [] (smpboot_thread_fn+0x17b/0x190)
** 215 printk messages dropped ** [ 4.331080] [] (warn_slowpath_common) from [] (warn_slowpath_null+0xf/0x14)
** 208 printk messages dropped ** [ 4.341965] [] (run_ksoftirqd) from [] (smpboot_thread_fn+0x17b/0x190)
** 233 printk messages dropped ** [ 4.354933] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 203 printk messages dropped ** [ 4.364930] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 237 printk messages dropped ** [ 4.377924] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 203 printk messages dropped ** [ 4.387924] [] (warn_slowpath_null) from [] (unpin_current_cpu+0x1f/0x50)
** 211 printk messages dropped ** [ 4.399843] ------------[ cut here ]------------
The text was updated successfully, but these errors were encountered: