Re: rtmutex deadlock detected (3.18.19-rt15)

[Thomas Gleixner <tglx@linutronix.de>]

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On Mon, 27 Jul 2015, DIXLOR wrote:
> 26.07.2015 21:56, Thomas Gleixner пишет:
> > On Sat, 25 Jul 2015, DIXLOR wrote:
> > > # xfs_fsr;
> > > ^C
> > > 
> > > [ 3380.373641] WARNING: CPU: 6 PID: 3664 at kernel/locking/rtmutex.h:29
> > > 0xffffffff814d4ea2()
> > > [ 3380.373641] rtmutex deadlock detected
> > > [ 3380.373645] Modules linked in: cpufreq_userspace cpufreq_powersave
> > > cpufreq_conservative nct6775 hwmon_vid xhci_hcd usbcore iTCO_wdt
> > > crct10dif_pclmul iTCO_vendor_support shpchp crc32c_intel i2c_i801 lpc_ich
> > > i2c_core usb_common mfd_core button processor dm_mod raid1 ahci libahci
> > > fan
> > > thermal thermal_sys [last unloaded: xhci_pci]
> > > [ 3380.373646] CPU: 6 PID: 3664 Comm: xfs_fsr Tainted: G D
> > > 3.18.19-rt15
> > > #3
> > > [ 3380.373647] Hardware name: MSI MS-7823/B85M-G43 (MS-7823), BIOS V3.14B3
> > > 06/23/2014
> > > [ 3380.373647]  0000000000000000 0000000000000009 ffffffff814d1350
> > > ffff8807ef65f538
> > > [ 3380.373648]  ffffffff810498dd ffff8807cf289d10 ffff8807ef65f5c0
> > > 0000000000000000
> > > [ 3380.373648]  0000000000000000 0000000000000002 ffffffff81049955
> > > ffffffff81680648
> > > [ 3380.373649] Call Trace:
> > > [ 3380.373649]  [<ffffffff814d1350>] ? 0xffffffff814d1350
> > Can you please build your kernel with KALLSYSMS_ALL enabled, so we get
> > a symbolic resolution of the call trace.
> > 
> > You can also try and enable CONFIG_PROVE_LOCKING. That will give us
> > even more detailed information about the problem at hand. Note, that
> > CONFIG_PROVE_LOCKING slows down your kernel, so don't try to run on a
> > production environment.
> I found the reason:  xfs mount with filestreams option.

Ok. So we still need to investigate what happens there.

Is there anything else required than

   - xfs mount with filestreams option
   - Running xfs_fsr and ^C it?

Thanks,

	tglx