kernel: Failed to release pages: bind_count=1, pages_pin_count=1, pin_global=0 #42
Description
Trying to run on current master of the driver, ubuntu 18.04 (kernel 4.15), and using mmap for the file, I got that in the kernel logs:
May 3 14:32:33 portable-alex kernel: [ 6993.616308] ------------[ cut here ]------------
May 3 14:32:33 portable-alex kernel: [ 6993.616310] Failed to release pages: bind_count=1, pages_pin_count=1, pin_global=0
May 3 14:32:33 portable-alex kernel: [ 6993.616395] WARNING: CPU: 1 PID: 8071 at /build/linux-QLn4bB/linux-4.15.0/drivers/gpu/drm/i915/i915_gem_userptr.c:89 cancel_userptr+0xe8/0xf0 [i915]
May 3 14:32:33 portable-alex kernel: [ 6993.616396] Modules linked in: msr ccm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat rfcomm nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables devlink cmac iptable_filter snd_hrtimer ipmi_devintf ipmi_msghandler bnep binfmt_misc nls_iso8859_1 arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_soc_skl snd_soc_skl_ipc kvm_intel snd_hda_ext_core snd_soc_sst_dsp snd_soc_sst_ipc snd_hda_codec_hdmi snd_soc_acpi kvm uvcvideo videobuf2_vmalloc videobuf2_memops btusb videobuf2_v4l2 irqbypass cdc_mbim btrtl cdc_wdm crct10dif_pclmul snd_hda_codec_realtek crc32_pclmul cdc_ncm
May 3 14:32:33 portable-alex kernel: [ 6993.616427] videobuf2_core ghash_clmulni_intel videodev btbcm snd_hda_codec_generic usbnet pcbc iwlmvm snd_soc_core cdc_acm btintel mii media mac80211 snd_compress ac97_bus snd_pcm_dmaengine bluetooth aesni_intel aes_x86_64 crypto_simd glue_helper cryptd ecdh_generic intel_cstate intel_rapl_perf iwlwifi idma64 virt_dma snd_seq_midi snd_hda_intel snd_seq_midi_event input_leds joydev cfg80211 snd_hda_codec serio_raw snd_hda_core snd_hwdep intel_lpss_pci thinkpad_acpi mei_me intel_wmi_thunderbolt wmi_bmof snd_pcm nvram snd_rawmidi mei processor_thermal_device intel_lpss shpchp intel_pch_thermal ucsi_acpi typec_ucsi intel_soc_dts_iosf snd_seq typec snd_seq_device snd_timer snd soundcore int3403_thermal int340x_thermal_zone int3400_thermal tpm_crb acpi_pad acpi_thermal_rel mac_hid sch_fq_codel parport_pc
May 3 14:32:33 portable-alex kernel: [ 6993.616457] ppdev lp parport ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear uas usb_storage i915 i2c_algo_bit drm_kms_helper e1000e psmouse syscopyarea sysfillrect nvme sysimgblt ptp pps_core fb_sys_fops nvme_core thunderbolt drm wmi video
May 3 14:32:33 portable-alex kernel: [ 6993.616477] CPU: 1 PID: 8071 Comm: kworker/u16:2 Tainted: G OE 4.15.0-21-generic #22-Ubuntu
May 3 14:32:33 portable-alex kernel: [ 6993.616478] Hardware name: LENOVO 20L7CTO1WW/20L7CTO1WW, BIOS N22ET34W (1.11 ) 03/13/2018
May 3 14:32:33 portable-alex kernel: [ 6993.616499] Workqueue: i915-userptr-release cancel_userptr [i915]
May 3 14:32:33 portable-alex kernel: [ 6993.616515] RIP: 0010:cancel_userptr+0xe8/0xf0 [i915]
May 3 14:32:33 portable-alex kernel: [ 6993.616516] RSP: 0000:ffffa45552e57e60 EFLAGS: 00010282
May 3 14:32:33 portable-alex kernel: [ 6993.616518] RAX: 0000000000000000 RBX: ffff8b3a5115fc00 RCX: 0000000000000006
May 3 14:32:33 portable-alex kernel: [ 6993.616518] RDX: 0000000000000007 RSI: 0000000000000082 RDI: ffff8b3ac1456490
May 3 14:32:33 portable-alex kernel: [ 6993.616519] RBP: ffffa45552e57e78 R08: 0000000000000001 R09: 0000000000000577
May 3 14:32:33 portable-alex kernel: [ 6993.616520] R10: ffffa45552e57e38 R11: 0000000000000000 R12: ffff8b3a5115fda8
May 3 14:32:33 portable-alex kernel: [ 6993.616521] R13: 0000000000000000 R14: ffff8b38e1ad0700 R15: 0000000000000000
May 3 14:32:33 portable-alex kernel: [ 6993.616522] FS: 0000000000000000(0000) GS:ffff8b3ac1440000(0000) knlGS:0000000000000000
May 3 14:32:33 portable-alex kernel: [ 6993.616523] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May 3 14:32:33 portable-alex kernel: [ 6993.616523] CR2: 00007f8b333c3000 CR3: 00000004e0c0a001 CR4: 00000000003606e0
May 3 14:32:33 portable-alex kernel: [ 6993.616524] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
May 3 14:32:33 portable-alex kernel: [ 6993.616525] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
May 3 14:32:33 portable-alex kernel: [ 6993.616526] Call Trace:
May 3 14:32:33 portable-alex kernel: [ 6993.616530] process_one_work+0x1de/0x410
May 3 14:32:33 portable-alex kernel: [ 6993.616532] worker_thread+0x32/0x410
May 3 14:32:33 portable-alex kernel: [ 6993.616534] kthread+0x121/0x140
May 3 14:32:33 portable-alex kernel: [ 6993.616535] ? process_one_work+0x410/0x410
May 3 14:32:33 portable-alex kernel: [ 6993.616537] ? kthread_create_worker_on_cpu+0x70/0x70
May 3 14:32:33 portable-alex kernel: [ 6993.616539] ret_from_fork+0x35/0x40
May 3 14:32:33 portable-alex kernel: [ 6993.616540] Code: bf 46 ff ff eb c9 8b 93 c8 01 00 00 8b 8b a4 01 00 00 48 c7 c7 70 d2 61 c0 8b b3 9c 01 00 00 c6 05 f5 56 10 00 01 e8 38 85 94 ee <0f> 0b eb bc 0f 1f 40 00 0f 1f 44 00 00 55 ba 08 00 00 00 48 89
May 3 14:32:33 portable-alex kernel: [ 6993.616566] ---[ end trace 5d962f9c324bf541 ]---
So far, a one-time message, but this might be a hint of something?