Messages in this thread | | | Subject | Re: [BUG] "sched: Remove rq->lock from the first half of ttwu()" locks up on ARM | From | Peter Zijlstra <> | Date | Thu, 26 May 2011 13:32:55 +0200 |
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On Thu, 2011-05-26 at 12:02 +0100, Marc Zyngier wrote:
> The box is currently building kernels in a loop (using -j64...). So far, > so good. Oh, and that fixed the load-average thing as well.
OK, great.
> Oh wait (my turn...): > INFO: task gcc:10030 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > > One of my ssh sessions is locking up periodically, and it generally > feels a bit sluggish.
The good news is that I can indeed confirm that, I somehow failed to notice that last night. I simply put the machine to build kernels and walked off, only to come back 30 minutes or so later to see it was still happily chugging along.
Further good news is that by disabling __ARCH_WANT_INTERRUPTS_ON_CTXSW again it goes away, so it must be something funny with the relatively little code under that directive.
The bad news is of course that I've got a little more head-scratching to do, will keep you informed.
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