[Linux-ia64] Re: O(1) scheduler fix for 2.5-ia64

David Mosberger
2002-11-05T00:22:01Z

>>>>> On Mon, 4 Nov 2002 19:53:07 +0100, Erich Focht <efocht@ess.nec.de> said:

Erich> Hi David, this problem is wellknown and I actually thought
Erich> that it was solved. But it looks like the complex
Erich> prepare_arch_switch() etc. macros didn't make it into the 2.5
Erich> kernels for IA64. They are needed on IA64 because we have to
Erich> release the runqueue lock during context switch. This is
Erich> similar to sparc64. Thanks to John Hawks for noticing this.

Yes, this seems to have fallen through the cracks. Can you remind me
what the deadlock scenario looked like?

--david