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Date: Tue, 24 May 2016 00:20:46 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Scot Doyle <lkml14@...tdoyle.com>
Cc: lkp@...org, LKML <linux-kernel@...r.kernel.org>,
David Daney <david.daney@...ium.com>,
0day robot <fengguang.wu@...el.com>
Subject: [fbcon] f6b88598e9: WARNING: CPU: 2 PID: 254 at
drivers/video/console/fbcon.c:1103 fbcon_init+0x3b6/0x610
FYI, we noticed the following commit:
https://github.com/0day-ci/linux Scot-Doyle/fbcon-warn-on-invalid-cursor-blink-intervals/20160520-063418
commit f6b88598e9bf2d5be5746cc4c7f0f75502de1b4c ("fbcon: warn on invalid cursor blink intervals")
in testcase: unixbench
with following parameters: cpufreq_governor=performance/nr_task=100%/test=dhry2reg
on test machine: lkp-ivb-d03: 4 threads Ivy Bridge with 4G memory
caused below changes:
+--------------------------------------------------------------------------+----------+------------+
| | v4.6-rc7 | f6b88598e9 |
+--------------------------------------------------------------------------+----------+------------+
| boot_successes | 2119 | 13 |
| boot_failures | 82 | 9 |
| BUG:sleeping_function_called_from_invalid_context_at_kernel/irq/manage.c | 36 | |
| backtrace:register_console | 29 | |
| backtrace:init_netconsole | 29 | |
| backtrace:do_init_module | 30 | |
| backtrace:load_module | 31 | |
| backtrace:SYSC_finit_module | 31 | |
| backtrace:SyS_finit_module | 31 | |
| WARNING:at_fs/btrfs/inode.c:#btrfs_destroy_inode[btrfs] | 1 | |
| WARNING:at_fs/btrfs/extent-tree.c:#btrfs_free_block_groups[btrfs] | 1 | |
| drm:fw_domains_get[i915]] | 19 | |
| drm:__gen6_gt_wait_for_thread_c0[i915]] | 19 | |
| backtrace:snb_uncore_imc_init_box | 19 | |
| invoked_oom-killer:gfp_mask=0x | 28 | |
| Mem-Info | 28 | |
| Out_of_memory:Kill_process | 27 | |
| backtrace:_do_fork | 13 | |
| backtrace:SyS_clone | 6 | |
| backtrace:do_sys_open | 1 | 9 |
| backtrace:SyS_open | 1 | 9 |
| backtrace:SYSC_newstat | 1 | |
| backtrace:SyS_newstat | 1 | |
| backtrace:call_usermodehelper_exec_work | 4 | |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 3 | |
| backtrace:vfs_write | 16 | |
| backtrace:SyS_write | 16 | |
| backtrace:vfs_fallocate | 3 | |
| backtrace:SyS_fallocate | 3 | |
| backtrace:vfs_read | 7 | |
| backtrace:SyS_read | 7 | |
| backtrace:do_mlock | 5 | |
| backtrace:SyS_mlock | 5 | |
| backtrace:kimage_load_segment | 1 | |
| backtrace:SyS_kexec_load | 1 | |
| BUG:kernel_test_crashed | 2 | |
| drm:intel_cpu_fifo_underrun_irq_handler[i915]] | 3 | |
| drm:intel_set_pch_fifo_underrun_reporting[i915]] | 3 | |
| drm:intel_pch_fifo_underrun_irq_handler[i915]] | 3 | |
| WARNING:at_fs/xfs/xfs_file.c:#xfs_file_dio_aio_write | 4 | |
| WARNING:at_fs/xfs/xfs_file.c:#xfs_file_read_iter | 2 | |
| backtrace:do_io_submit | 2 | |
| backtrace:SyS_io_submit | 2 | |
| BUG:unable_to_handle_kernel | 5 | |
| Oops | 5 | |
| RIP:i915_capture_error_state[i915] | 1 | |
| Kernel_panic-not_syncing:Fatal_exception | 5 | |
| backtrace:i915_hangcheck_elapsed | 1 | |
| drm:i915_reset[i915]] | 1 | |
| BUG:kernel_test_hang | 1 | |
| RIP:ftrace_stub | 4 | |
| backtrace:return_to_handler | 2 | |
| backtrace:ftrace_graph_caller | 1 | |
| WARNING:at_drivers/video/console/fbcon.c:#fbcon_init | 0 | 9 |
| backtrace:fbcon_init | 0 | 9 |
| backtrace:warn_slowpath_fmt | 0 | 9 |
| backtrace:visual_init | 0 | 9 |
| backtrace:con_install | 0 | 9 |
| backtrace:tty_init_dev | 0 | 9 |
+--------------------------------------------------------------------------+----------+------------+
[ 13.127961] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 13.128224] sr 4:0:0:0: Attached scsi CD-ROM sr0
[ 13.138102] ------------[ cut here ]------------
[ 13.138109] WARNING: CPU: 2 PID: 254 at drivers/video/console/fbcon.c:1103 fbcon_init+0x3b6/0x610
[ 13.138110] blink interval < 50 ms
[ 13.138131] Modules linked in: sr_mod cdrom x86_pkg_temp_thermal coretemp snd_hda_codec_realtek snd_hda_codec_generic ppdev kvm irqbypass crct10dif_pclmul snd_hda_intel crc32_pclmul ahci snd_hda_codec crc32c_intel i915 libahci snd_hda_core snd_hwdep snd_pcm drm_kms_helper snd_timer syscopyarea sysfillrect ghash_clmulni_intel sysimgblt serio_raw fb_sys_fops cryptd pcspkr snd libata soundcore drm shpchp wmi parport_pc parport video
[ 13.138133] CPU: 2 PID: 254 Comm: systemd-logind Not tainted 4.6.0-rc7-00001-gf6b88598 #1
[ 13.138134] Hardware name: Hewlett-Packard HP Pro 3340 MT/17A1, BIOS 8.07 01/24/2013
[ 13.138137] 0000000000000000 ffff8800b76afa30 ffffffff8142e95a ffff8800b76afa80
[ 13.138139] 0000000000000000 ffff8800b76afa70 ffffffff8107b9d1 0000044fb76b0000
[ 13.138141] ffff8800b7460400 ffff8800b741ac00 ffff880111098000 0000000000000001
[ 13.138142] Call Trace:
[ 13.138147] [<ffffffff8142e95a>] dump_stack+0x63/0x89
[ 13.138151] [<ffffffff8107b9d1>] __warn+0xd1/0xf0
[ 13.138154] [<ffffffff8107ba3f>] warn_slowpath_fmt+0x4f/0x60
[ 13.138157] [<ffffffff81533857>] ? con_copy_unimap+0x37/0x70
[ 13.138160] [<ffffffff8149db56>] fbcon_init+0x3b6/0x610
[ 13.138163] [<ffffffff810a1119>] ? __might_sleep+0x49/0x80
[ 13.138165] [<ffffffff815349fa>] visual_init+0xca/0x130
[ 13.138168] [<ffffffff8153771a>] vc_allocate+0xea/0x1c0
[ 13.138171] [<ffffffff81537817>] con_install+0x27/0xe0
[ 13.138174] [<ffffffff815228c2>] tty_init_dev+0x72/0x1c0
[ 13.138176] [<ffffffff81522f75>] tty_open+0x565/0x640
[ 13.138181] [<ffffffff8158422f>] ? kobj_lookup+0x10f/0x160
[ 13.138185] [<ffffffff811ffcd7>] chrdev_open+0xb7/0x190
[ 13.138189] [<ffffffff811f863f>] do_dentry_open+0x1cf/0x310
[ 13.138191] [<ffffffff811ffc20>] ? cdev_put+0x30/0x30
[ 13.138194] [<ffffffff811f99d8>] vfs_open+0x58/0x60
[ 13.138196] [<ffffffff81209766>] path_openat+0x1a6/0x13d0
[ 13.138198] [<ffffffff810a1119>] ? __might_sleep+0x49/0x80
[ 13.138200] [<ffffffff8120ba2e>] do_filp_open+0x7e/0xe0
[ 13.138202] [<ffffffff8120ab66>] ? getname_flags+0x56/0x1f0
[ 13.138205] [<ffffffff811d87f5>] ? kmem_cache_alloc+0x1a5/0x200
[ 13.138207] [<ffffffff812196d6>] ? __alloc_fd+0x46/0x180
[ 13.138209] [<ffffffff811f9d16>] do_sys_open+0x116/0x1f0
[ 13.138211] [<ffffffff811f9e0e>] SyS_open+0x1e/0x20
[ 13.138214] [<ffffffff81906af2>] entry_SYSCALL_64_fastpath+0x1a/0xa4
[ 13.138215] ---[ end trace 906614667f342710 ]---
[ 13.138215] ---[ end trace 906614667f342710 ]---
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
View attachment "config-4.6.0-rc7-00001-gf6b88598" of type "text/plain" (147025 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (16724 bytes)
View attachment "job.yaml" of type "text/plain" (3428 bytes)
View attachment "reproduce" of type "text/plain" (413 bytes)
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