Re: [PATCH] 0/2 Buddy allocator with placement policy (Version 9)+ prezeroing (Version 4)

From: Dave Hansen
Date: Thu Mar 10 2005 - 15:31:27 EST

On Thu, 2005-03-10 at 12:11 -0800, Paul Jackson wrote:
> Dave wrote:
> > Perhaps default policies inherited from a cpuset, but overridden by
> > other APIs would be a good compromise.
> Perhaps. The madvise() and numa calls (mbind, set_mempolicy) only
> affect the current task, as is usually appropriate for calls that allow
> specification of specific address ranges (strangers shouldn't be messing
> in my address space). Some external means to set default policy for
> whole tasks seems to be needed, as well, which could well be via the
> cpuset.

Shouldn't a particular task know what the policy should be when it is
launched? If the policy is only per-task and known at task exec time,
I'd imagine that a simple exec wrapper setting a flag would be much more
effective than even defining the policy in a cpuset.

-- Dave

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