RE: +AFs-Linux-ia64+AF0- reader-writer livelock proble

David Mosberger (davidm@napali.hpl.hp.com)
Mon, 11 Nov 2002 13:21:34 -0800


>>>>> On Mon, 11 Nov 2002 14:36:38 -0600, "Van Maren, Kevin" <kevin.vanmaren@unisys.com> said:

Van> I have not looked at this, but I don't believe it is the right
Van> way to solve the problem: users who +AF8-need+AF8- to use all
Van> the CPUs for computation would be punished just to work around
Van> a kernel implementation issue: that's like saying don't allow
Van> processes to allocate virtual memory because if the VM is
Van> over-committed by X amount the kernel deadlocks.

Van> It would be a bad hack to limit the system-call rate just to
Van> prevent livelock.

Certainly. I didn't suggest PRM as a way to _solve_ the livelock
problem, but since Mario asked for a method to cap CPU utilization, I
mentiond it.

--david
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