Messages in this thread | | | From | Martin <> | Subject | Re: Kernel panic on HT machine - maybe i915 related? | Date | Wed, 15 Jun 2011 22:24:34 +0200 |
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wzab wrote:
> Hi, > I tried to find the source of the problem I experience, supposing, that > it may affect also other users of machine with Hyper-Threaded CPU. > [...]
Hi wzab et al,
only today I have started to use a spare machine at work, with a hyperthreaded CPU (P4 3.2GHz). I also experience random kernel panics with 2.6.39.1 and SMP/HT enabled. The machine usually runs for a couple of hours before the panic occurs.
> Crash seems to happen in random places: > [...]
Same here, although my panics look different from yours. In both cases I had a lot of hardware interrupts on the stack trace but no kmemcheck. I only remembered to take a photo with my mobile phone the second time. The stack trace contains handle_*irq*, tg3, ata_bmdma, __ata_sff, i915, drm_vblank_put, intel_thermal, try_preempt, resched*, drm_vblank_put, do_invalid_op, oops_end, do_bounds, panic. The EIP is drm_vblank_put+0x13/0x50.
Could this be an i915 issue with 2.6.39.1? At home I have two other machines on i915 but with different chipsets that run fine with the same kernel.
> As crash occurs only with HT on and doesn't happen on another machine > with 2 cores, it seems that maybe the problem is associated with > incorrect allocation of resources or locking for HT enabled CPU...
I do not observe the issue with the regular non-SMP 2.6.38.7 distro kernel, so it might be HT related. Truth be told I need to investigate further since my 2.6.39.1 kernel is patched. In the meantime, if someone recognizes the issue please come forward.
Thanks and regards,
Martin
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