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

From: David Mosberger <davidm_at_napali.hpl.hp.com>
Date: 2002-11-12 08:21:34
>>>>> 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.

Received on Mon Nov 11 13:23:14 2002

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