On Thursday 30 September 2010 07:23:34 Alexander Motin wrote: > David Naylor wrote: > > On Wednesday 29 September 2010 18:25:13 Alexander Motin wrote: > >> David Naylor wrote: > >>> On Wednesday 29 September 2010 16:19:08 Andriy Gapon wrote: > >>>> What do you try to actually achieve? > >>> > >>> I was trying to boot a system and it was panicking due to stray > >>> interrupts. It turned out to be caused by HPET. I found > >>> `hint.hpet.0.clock=0' which fixed the problem. > >>> > >>> This means HPET does not work on any of my machines. The other one's > >>> symptoms are hda losing interrupts after a period of up-time. > >> > >> What chipset do you use? Nvidia MCP5x? Could you send me your verbose > >> dmesg? > > > > Yes, the one is a MCP51, the other is a ICH8M. > > > > The desktop is a Gigabyte N650SLI-DS4L. Its symptom is hda losing > > interrupts after a period of time. > > There are too many reports about different lost interrupts problems on > different controllers of MCP5x. I don't know the reason. Attached patch > should disable using regular HPET interrupts on NVidia chipsets. I hope > it will work as workaround. May be it is too aggressive, but better to > be safe then sorry. I assume that legacy_route mode may still work fine > there. It would be nice to test it. I assume you mean hint.hpet.0.legacy_route=1? I'll give that a try later today on both machines. Is your patch the same as hint.hpet.0.clock=0? > > The laptop is a Acer 2920. Its symptom for a GENERIC is a panic saying > > stray interrupt (irq7), with a custom kernel booting stalls. > > This is strange, as my Acer with the same ICH8M works fine in all > possible modes. Also IMHO stray interrupts are not a reason to panic. > Could you show what it looks like? See http://markmail.org/message/smxnofrdmmkxyvnd for my previous email that includes the backtrace from that panic. When I booted in i386 safe mode the kernel reported stray interrupts on irq7. vmstat -i shows irq7 as "stray irq7". Is there anything else you are looking for?
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