WARNING: complate_all() with 7 waiters at system boot

WARNING: complate_all() with 7 waiters at system boot

[Roosen Henri]

Hi all,

My x86_64 development PC with kernel 4.4.7-rt16 throws the following warning during system boot:

[   12.606217] ------------[ cut here ]------------
[   12.606220] WARNING: CPU: 5 PID: 872 at kernel/sched/swait.c:48 complete_all+0x2a/0x40()
[   12.606220] complate_all() with 7 waiters
[   12.606243] Modules linked in: arc4 ecb md4 nls_utf8 cifs dns_resolver fscache ftdi_sio usbserial joydev hid_logitech_hidpp hid_logitech_dj hid_generic usbhid usb_storage hid intel_rapl iosf_mbi evdev iTCO_wdt iTCO_vendor_support intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd serio_raw pcspkr nouveau mxm_wmi tpm_infineon wmi ttm snd_hda_codec_hdmi drm_kms_helper drm i2c_i801 i2c_algo_bit i2c_core snd_hda_codec_realtek snd_hda_codec_generic battery snd_hda_intel snd_hda_codec fujitsu_laptop snd_hda_core snd_hwdep snd_pcm video snd_timer tpm_tis mei_me snd loop lpc_ich tpm soundcore mfd_core mei shpchp button processor fuse 
 parport_pc
[   12.606252]  ppdev lp parport autofs4 ext4 crc16 mbcache jbd2 sg sr_mod cdrom sd_mod ahci libahci crc32c_intel libata xhci_pci ehci_pci psmouse scsi_mod xhci_hcd e1000e ehci_hcd ptp usbcore pps_core usb_common fan thermal
[   12.606253] CPU: 5 PID: 872 Comm: cryptomgr_probe Not tainted 4.4.7-rt16 #2
[   12.606254] Hardware name: FUJITSU CELSIUS W530/D3227-A1, BIOS V4.6.5.4 R1.34.0 for D3227-A1x 01/08/2015
[   12.606256]  0000000000000000 ffffffff812e0e0e ffff88021142be30 ffffffff81731e02
[   12.606257]  ffffffff81073f81 ffff88003614fd30 ffff88021142be80 0000000000000246
[   12.606258]  ffff880212206400 0000000000000000 ffffffff8107401c ffffffff81726fb0
[   12.606258] Call Trace:
[   12.606262]  [<ffffffff812e0e0e>] ? dump_stack+0x5c/0x7e
[   12.606265]  [<ffffffff81073f81>] ? warn_slowpath_common+0x81/0xd0
[   12.606266]  [<ffffffff8107401c>] ? warn_slowpath_fmt+0x4c/0x50
[   12.606267]  [<ffffffff810b5849>] ? swake_up_all_locked+0x29/0x80
[   12.606268]  [<ffffffff810b5eca>] ? complete_all+0x2a/0x40
[   12.606279]  [<ffffffff812a3241>] ? cryptomgr_probe+0x91/0xd0
[   12.606280]  [<ffffffff812a31b0>] ? crypto_alg_put+0x20/0x20
[   12.606282]  [<ffffffff81092cbf>] ? kthread+0xcf/0xf0
[   12.606283]  [<ffffffff81092bf0>] ? kthread_worker_fn+0x190/0x190
[   12.606286]  [<ffffffff8156e38f>] ? ret_from_fork+0x3f/0x70
[   12.606287]  [<ffffffff81092bf0>] ? kthread_worker_fn+0x190/0x190
[   12.606288] ---[ end trace 0000000000000002 ]---

Thanks,
Henri
--

________________________________

Ginzinger electronic systems GmbH
Gewerbegebiet Pirath 16
4952 Weng im Innkreis
www.ginzinger.com

Firmenbuchnummer: FN 364958d
Firmenbuchgericht: Ried im Innkreis
UID-Nr.: ATU66521089

Re: WARNING: complate_all() with 7 waiters at system boot

[Sebastian Andrzej Siewior]

* Roosen Henri | 2016-05-06 09:23:02 [+0000]:

>Hi all,
Hi,

>My x86_64 development PC with kernel 4.4.7-rt16 throws the following warning during system boot:

Thank you for the report. The warning is harmless I am just interrested
what kind of workload / usage triggers this warning.

>[   12.606217] ------------[ cut here ]------------
>[   12.606220] WARNING: CPU: 5 PID: 872 at kernel/sched/swait.c:48 complete_all+0x2a/0x40()
>[   12.606220] complate_all() with 7 waiters

Do I assume currectly that at this point you have your filesystem already
mounted? Do you use LUKS on your harddisk or what is it that trigger
the usage of crypto code here?

>[   12.606253] CPU: 5 PID: 872 Comm: cryptomgr_probe Not tainted 4.4.7-rt16 #2
>[   12.606254] Hardware name: FUJITSU CELSIUS W530/D3227-A1, BIOS V4.6.5.4 R1.34.0 for D3227-A1x 01/08/2015
>[   12.606256]  0000000000000000 ffffffff812e0e0e ffff88021142be30 ffffffff81731e02
>[   12.606257]  ffffffff81073f81 ffff88003614fd30 ffff88021142be80 0000000000000246
>[   12.606258]  ffff880212206400 0000000000000000 ffffffff8107401c ffffffff81726fb0
>[   12.606258] Call Trace:
>[   12.606262]  [<ffffffff812e0e0e>] ? dump_stack+0x5c/0x7e
>[   12.606265]  [<ffffffff81073f81>] ? warn_slowpath_common+0x81/0xd0
>[   12.606266]  [<ffffffff8107401c>] ? warn_slowpath_fmt+0x4c/0x50
>[   12.606267]  [<ffffffff810b5849>] ? swake_up_all_locked+0x29/0x80
>[   12.606268]  [<ffffffff810b5eca>] ? complete_all+0x2a/0x40
>[   12.606279]  [<ffffffff812a3241>] ? cryptomgr_probe+0x91/0xd0
>[   12.606280]  [<ffffffff812a31b0>] ? crypto_alg_put+0x20/0x20
>[   12.606282]  [<ffffffff81092cbf>] ? kthread+0xcf/0xf0
>[   12.606283]  [<ffffffff81092bf0>] ? kthread_worker_fn+0x190/0x190
>[   12.606286]  [<ffffffff8156e38f>] ? ret_from_fork+0x3f/0x70
>[   12.606287]  [<ffffffff81092bf0>] ? kthread_worker_fn+0x190/0x190
>[   12.606288] ---[ end trace 0000000000000002 ]---
>
>Thanks,
>Henri

Sebastian

AW: WARNING: complate_all() with 7 waiters at system boot

[Roosen Henri]

> -----Ursprüngliche Nachricht-----
> Von: Sebastian Andrzej Siewior [mailto:bigeasy@linutronix.de]
> Gesendet: Freitag, 6. Mai 2016 16:23
> An: Roosen Henri
> Cc: linux-rt-users@vger.kernel.org; Daniel Wagner
> Betreff: Re: WARNING: complate_all() with 7 waiters at system boot
>
> * Roosen Henri | 2016-05-06 09:23:02 [+0000]:
>
> >Hi all,
> Hi,
>
> >My x86_64 development PC with kernel 4.4.7-rt16 throws the following
> warning during system boot:
>
> Thank you for the report. The warning is harmless I am just interrested what
> kind of workload / usage triggers this warning.
>
> >[   12.606217] ------------[ cut here ]------------
> >[   12.606220] WARNING: CPU: 5 PID: 872 at kernel/sched/swait.c:48
> complete_all+0x2a/0x40()
> >[   12.606220] complate_all() with 7 waiters
>
> Do I assume currectly that at this point you have your filesystem already
> mounted? Do you use LUKS on your harddisk or what is it that trigger the
> usage of crypto code here?

Root-filesystem is already loaded, but I'm not using LUKS.
However, the mounting of the (CIFS) network-drives seems to trigger this.

If I remove the network drives from fstab and mount them later, no complete_all() warning is triggered. So this ontly triggers during system startup.

>
> >[   12.606253] CPU: 5 PID: 872 Comm: cryptomgr_probe Not tainted 4.4.7-
> rt16 #2
> >[   12.606254] Hardware name: FUJITSU CELSIUS W530/D3227-A1, BIOS
> V4.6.5.4 R1.34.0 for D3227-A1x 01/08/2015
> >[   12.606256]  0000000000000000 ffffffff812e0e0e ffff88021142be30
> ffffffff81731e02
> >[   12.606257]  ffffffff81073f81 ffff88003614fd30 ffff88021142be80
> 0000000000000246
> >[   12.606258]  ffff880212206400 0000000000000000 ffffffff8107401c
> ffffffff81726fb0
> >[   12.606258] Call Trace:
> >[   12.606262]  [<ffffffff812e0e0e>] ? dump_stack+0x5c/0x7e
> >[   12.606265]  [<ffffffff81073f81>] ? warn_slowpath_common+0x81/0xd0
> >[   12.606266]  [<ffffffff8107401c>] ? warn_slowpath_fmt+0x4c/0x50
> >[   12.606267]  [<ffffffff810b5849>] ? swake_up_all_locked+0x29/0x80
> >[   12.606268]  [<ffffffff810b5eca>] ? complete_all+0x2a/0x40
> >[   12.606279]  [<ffffffff812a3241>] ? cryptomgr_probe+0x91/0xd0
> >[   12.606280]  [<ffffffff812a31b0>] ? crypto_alg_put+0x20/0x20
> >[   12.606282]  [<ffffffff81092cbf>] ? kthread+0xcf/0xf0
> >[   12.606283]  [<ffffffff81092bf0>] ? kthread_worker_fn+0x190/0x190
> >[   12.606286]  [<ffffffff8156e38f>] ? ret_from_fork+0x3f/0x70
> >[   12.606287]  [<ffffffff81092bf0>] ? kthread_worker_fn+0x190/0x190
> >[   12.606288] ---[ end trace 0000000000000002 ]---
> >
> >Thanks,
> >Henri
>
> Sebastian

________________________________

Ginzinger electronic systems GmbH
Gewerbegebiet Pirath 16
4952 Weng im Innkreis
www.ginzinger.com

Firmenbuchnummer: FN 364958d
Firmenbuchgericht: Ried im Innkreis
UID-Nr.: ATU66521089