Re: + per-cpuset-hugetlb-accounting-and-administration.patch addedto -mm tree

[Paul Jackson]

Adding Christoph Lameter <clameter@xxxxxxx> to the cc list, as he knows
more about hugetlb pages than I do.

This patch strikes me as a bit odd.

Granted, it's solving what could be a touchy problem with a fairly
simple solution, which is usually a Good Thing(tm).

However, the idea that different tasks would see different values for
the following fields in /proc/meminfo:

	HugePages_Total:     0
	HugePages_Free:      0

strikes me as odd, and risky.  I would have thought that usually, all
tasks in the system should see the same values in the files in /proc
(as opposed to the files in particular task subdirectories /proc/<pid>.)

This patch strikes me as a bit of a hack, good for compatibility, but
hiding a booby trap that will bite some user code in the long run.

But I'm not enough of an expert to know what the right tradeoffs are
in this matter.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@xxxxxxx> 1.925.600.0401
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