FYI, we noticed the following commit: commit: 9881b024b7d7671f6a014091bc96506b89081802 ("sched/clock: Delay switching sched_clock to stable") https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master in testcase: pm-qa with following parameters: test: cpuidle on test machine: 12 threads Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz with 6G memory caused below changes: +------------------------------------------------------------------+------------+------------+ | | 555570d744 | 9881b024b7 | +------------------------------------------------------------------+------------+------------+ | boot_successes | 3 | 9 | | boot_failures | 1 | 16 | | BUG:kernel_reboot-without-warning_in_test_stage | 1 | | | invoked_oom-killer:gfp_mask=0x | 0 | 4 | | Mem-Info | 0 | 4 | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 0 | 4 | | WARNING:at_kernel/sched/clock.c:#set_sched_clock_stable | 0 | 12 | +------------------------------------------------------------------+------------+------------+ [ 1457.700884] [ 1457.701518] masked ExtINT on CPU#1 [ 1457.701523] ------------[ cut here ]------------ [ 1457.701527] WARNING: CPU: 1 PID: 0 at kernel/sched/clock.c:114 set_sched_clock_stable+0x66/0x70 [ 1457.701527] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole sr_mod cdrom sg intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel snd_hda_codec_realtek ghash_clmulni_intel ppdev mxm_wmi pcbc snd_hda_codec_generic aesni_intel crypto_simd glue_helper cryptd pcspkr ahci libahci firewire_ohci libata snd_hda_intel firewire_core crc_itu_t snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore i7core_edac edac_core shpchp winbond_cir rc_core floppy parport_pc parport wmi acpi_cpufreq ip_tables [ 1457.701544] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W I 4.10.0-rc3-00259-g9881b02 #1 [ 1457.701544] Hardware name: /DX58SO, BIOS SOX5810J.86A.4934.2010.0129.1220 01/29/2010 [ 1457.701545] Call Trace: [ 1457.701549] dump_stack+0x63/0x8a [ 1457.701550] __warn+0xcb/0xf0 [ 1457.701551] warn_slowpath_null+0x1d/0x20 To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Kernel Test Robot