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

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> -----Ursprüngliche Nachricht-----
> Von: Sebastian Andrzej Siewior [mailto:bigeasy@xxxxxxxxxxxxx]
> Gesendet: Freitag, 6. Mai 2016 16:23
> An: Roosen Henri
> Cc: linux-rt-users@xxxxxxxxxxxxxxx; 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

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