malloc > 3Gb

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Hi, I have a test process which continuously mallocs memory and I find
it stops at 2.625Gb. Shouldn't it malloc upto 3Gb (given the standard
split is 3/1Gb).

Furthermore on that box I ran a kernel compiled with HIGHMEM support
(64G,HIGHPTE all options turned on). There was no difference to malloc
however and I still errored out at the same limit.

Any ideas? Thanks,

			Vikram



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