On Wed, 30 Apr 2014, Peter Zijlstra wrote:
> Vince, could you add the below to whatever tracing muck you already
> have?
OK, running with your patch, I get this messages a few times. No crashing
or memory corruption messages, but as I've said before that only happens
maybe 10% of the time, let me run a few more times.
line 1666 is
WARN_ON(event->ctx != ctx);
[ 583.051054] ------------[ cut here ]------------
[ 583.056011] WARNING: CPU: 1 PID: 2479 at kernel/events/core.c:1666
event_sched_in.isra.77+0x209/0x230()
[ 583.066099] Modules linked in: fuse snd_hda_codec_hdmi x86_pkg_temp_thermal
intel_powerclamp coretemp i915 kvm snd_hda_codec_realtek snd_hda_codec_generic
snd_hda_intel snd_hda_controller crct10dif_pclmul drm_kms_helper snd_hda_codec
crc32_pclmul ghash_clmulni_intel aesni_intel snd_hwdep snd_pcm drm snd_seq
aes_x86_64 lrw evdev parport_pc iTCO_wdt gf128mul snd_timer tpm_tis
snd_seq_device glue_helper i2c_i801 snd iTCO_vendor_support ablk_helper cryptd
parport psmouse pcspkr serio_raw button processor video battery i2c_algo_bit
i2c_core tpm wmi lpc_ich mfd_core mei_me mei soundcore sg sd_mod sr_mod
crc_t10dif crct10dif_common cdrom ahci libahci ehci_pci xhci_hcd ehci_hcd
libata e1000e scsi_mod ptp usbcore crc32c_intel pps_core usb_common fan thermal
thermal_sys
[ 583.139793] CPU: 1 PID: 2479 Comm: perf_fuzzer Not tainted 3.15.0-rc1+ #92
[ 583.147150] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS
01/26/2014
[ 583.155136] 0000000000000009 ffff8800cdb85bf0 ffffffff81649790
0000000000000000
[ 583.163109] ffff8800cdb85c28 ffffffff810646ad ffff8800cf085000
ffff8800cd762c00
[ 583.171171] ffff88011ea58398 ffff88011ea5839c 0000007c37c9d592
ffff8800cdb85c38
[ 583.179182] Call Trace:
[ 583.181834] [<ffffffff81649790>] dump_stack+0x45/0x56
[ 583.187355] [<ffffffff810646ad>] warn_slowpath_common+0x7d/0xa0
[ 583.193802] [<ffffffff8106478a>] warn_slowpath_null+0x1a/0x20
[ 583.200054] [<ffffffff81135d69>] event_sched_in.isra.77+0x209/0x230
[ 583.206830] [<ffffffff81135e42>] group_sched_in+0xb2/0x1e0
[ 583.212824] [<ffffffff81136094>] ctx_sched_in+0x124/0x1f0
[ 583.218711] [<ffffffff811361c0>] perf_event_sched_in+0x60/0x90
[ 583.225063] [<ffffffff81136a1f>] __perf_install_in_context+0x11f/0x1a0
[ 583.232181] [<ffffffff811317a0>] remote_function+0x40/0x50
[ 583.238127] [<ffffffff810dda26>] generic_exec_single+0x126/0x170
[ 583.244681] [<ffffffff81131760>] ? task_clock_event_add+0x40/0x40
[ 583.251300] [<ffffffff810ddad7>] smp_call_function_single+0x67/0xa0
[ 583.258103] [<ffffffff81130784>] task_function_call+0x44/0x50
[ 583.264366] [<ffffffff81136900>] ? perf_cpu_hrtimer_handler+0x200/0x200
[ 583.271547] [<ffffffff81131ba6>] perf_install_in_context+0x86/0x100
[ 583.278342] [<ffffffff8113a488>] SYSC_perf_event_open+0x968/0xb00
[ 583.284990] [<ffffffff8113aa09>] SyS_perf_event_open+0x9/0x10
[ 583.291249] [<ffffffff8165a46d>] system_call_fastpath+0x1a/0x1f
[ 583.297658] ---[ end trace 41ec7a21bb260454 ]---
[ 623.740479] ------------[ cut here ]------------
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