Re: 2.5.64-mm2->4 hangs on contest

William Lee Irwin III
2003-03-10T10:11:38Z

At 08:12 PM 3/10/2003 +1100, Con Kolivas wrote:
>> Contest uses a modified process load from irman so it exhibits similar
>> behaviour. Not sure what +12 actually tells me though :-(

On Mon, Mar 10, 2003 at 11:05:25AM +0100, Mike Galbraith wrote:
> Aha! No wonder your symptoms look so similar. +12 is just a magic number
> that works... found by trusty old trial and error method. What I wanted to
> see was if your hang would also go away with the same magic number, or if
> renicing with any value helped you at all.

At 08:12 PM 3/10/2003 +1100, Con Kolivas wrote:
>> My simplistic understanding is that the pipe task in process_load gets
>> constantly elevated as "interactive" by the new scheduler, and nothing else
>> ever happens.

On Mon, Mar 10, 2003 at 11:05:25AM +0100, Mike Galbraith wrote:
> Appears so. I can make it "work" by doing a dinky (butt ugly:) tweak in
> activate_task().

IMHO directed yields should attempt to prevent priority inversion but
not elevate priorities otherwise. I'd bug mingo about it.

-- wli