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Message-ID: <20070526171231.GG11760@vanheusden.com> Date: Sat, 26 May 2007 19:12:31 +0200 From: Folkert van Heusden <folkert@...heusden.com> To: Thomas Gleixner <tglx@...utronix.de> Cc: Parag Warudkar <parag.warudkar@...il.com>, linux-kernel@...r.kernel.org Subject: Re: [2.6.21.1] soft lockup when removing netconsole module > > > > > > Seems to be hrtimers related - CC'ed Thomas. > > > > > I doubt that. The tick interrupt just finds out, that the machine is > > > > > stuck in rmmod. > > > > > > > Also the rmmod hangs and would not exit even with kill -9. It also > > > > > > > sucks up 100% cpu. > > > > > Can you please enable CONFIG_PROVE_LOCKING ? > > > > Luckily I already had :-) > > > > Here is its output: > > > So there is no output from lockdep, during the rmmod hang ? The rmmod > > Nope, just other subsystems (nfs, usb) minutes before that. > Hmm. Can you provide the output of that ? Might be some stale stuff > leading to the hang later. It is output like: [ 843.122782] usb 7-2: usbfs: USBDEVFS_CONTROL failed cmd newhidups rqt 161 rq 1 len 10 ret -110 [ 1292.121131] usb 7-2: usbfs: USBDEVFS_CONTROL failed cmd newhidups rqt 161 rq 1 len 10 ret -110 and about the nfs server temporarily not available. Please note that I did not do the rmmod from a nfs mountpoint. Folkert van Heusden -- Multitail - gibkaja utilita po sledovaniju log-fajlov i vyvoda kommand. Fil'trovanie, raskrašivanie, slijanie, vizual'noe sravnenie, i t.d. http://www.vanheusden.com/multitail/ ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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