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Date: Thu, 4 May 2017 10:59:26 +0800 From: kernel test robot <xiaolong.ye@...el.com> To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Cc: LKML <linux-kernel@...r.kernel.org>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, lkp@...org Subject: [lkp-robot] [rcuperf] 87c458e630: WARNING:at_arch/x86/kernel/smp.c:#native_smp_send_reschedule FYI, we noticed the following commit: commit: 87c458e6304c6a1b37bf856e88c70fc37f08851f ("rcuperf: Set more user-friendly defaults") https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2017.04.21a in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 1G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +----------------------------------------------------------------------------------+------------+------------+ | | 7984237c13 | 87c458e630 | +----------------------------------------------------------------------------------+------------+------------+ | boot_successes | 0 | 6 | | boot_failures | 30 | 24 | | invoked_oom-killer:gfp_mask=0x | 30 | | | Mem-Info | 30 | | | Out_of_memory:Kill_process | 30 | | | page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY),nodemask=(null) | 7 | | | BUG:kernel_hang_in_test_stage | 0 | 18 | | WARNING:at_arch/x86/kernel/smp.c:#native_smp_send_reschedule | 0 | 14 | +----------------------------------------------------------------------------------+------------+------------+ [ 15.553978] WARNING: CPU: 0 PID: 9 at arch/x86/kernel/smp.c:127 native_smp_send_reschedule+0x4f/0x68 [ 15.556230] Modules linked in: [ 15.556868] CPU: 0 PID: 9 Comm: migration/0 Not tainted 4.11.0-rc2-00091-g87c458e #1 [ 15.558408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014 [ 15.560409] Call Trace: [ 15.560937] dump_stack+0x61/0x7e [ 15.561604] __warn+0xc2/0xdd [ 15.562219] warn_slowpath_null+0x1d/0x1f [ 15.563027] native_smp_send_reschedule+0x4f/0x68 [ 15.564061] resched_curr+0x9e/0x168 [ 15.564792] check_preempt_curr+0x4a/0x92 [ 15.565592] move_queued_task+0x1cc/0x1d6 [ 15.566415] __migrate_task+0x88/0x97 [ 15.567158] migration_cpu_stop+0x77/0xa4 [ 15.567968] ? sched_ttwu_pending+0xbd/0xbd [ 15.568815] cpu_stopper_thread+0x84/0xf3 [ 15.569613] ? sort_range+0x22/0x22 [ 15.570326] smpboot_thread_fn+0x1cc/0x1e3 [ 15.571164] kthread+0x12d/0x135 [ 15.571825] ? kthread_create_on_node+0x3f/0x3f [ 15.572742] ret_from_fork+0x2c/0x40 [ 15.573468] ---[ end trace ce70cc5403b8b2a1 ]--- To reproduce: git clone https://github.com/01org/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Xiaolong View attachment "config-4.11.0-rc2-00091-g87c458e" of type "text/plain" (92755 bytes) View attachment "job-script" of type "text/plain" (4325 bytes) Download attachment "dmesg.xz" of type "application/octet-stream" (13476 bytes)
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