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Date: Fri, 3 Jun 2011 21:44:01 +0900 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Arne Jansen <lists@...-jansens.de> Cc: Peter Zijlstra <peterz@...radead.org>, mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org, efault@....de, npiggin@...nel.dk, akpm@...ux-foundation.org, frank.rowand@...sony.com, tglx@...utronix.de, mingo@...e.hu, linux-tip-commits@...r.kernel.org Subject: Re: [tip:sched/locking] sched: Add p->pi_lock to task_rq_lock() On Fri, Jun 3, 2011 at 7:02 PM, Arne Jansen <lists@...-jansens.de> wrote: > > No, it doesn't trigger, but the hang is not as complete as I first > thought. A running iostat via ssh continues to give output for a while, > the serial console still reacts to return and prompts for login. But > after a while more and more locks up. The console locks as soon as I > sysrq-t. Is it the tty rescheduling bug? That would explain the printk's mattering. Remove the schedule_work() call from flush_to_ldisc() in drivers/tty/tty_buffer.c and see if the problem goes away. See the other discussion thread on lkml ("tty breakage in X (Was: tty vs workqueue oddities)") Hmm? Linus -- 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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