Re: What means Hugepage? 8KiB,16KiB,..,2MiB or 4MiB?
From: H. Peter Anvin
Date: Tue Mar 25 2008 - 19:00:14 EST
J.C. Pizarro wrote:
What means Hugepage?
Does it mean 8KiB? 16KiB? 32KiB? 64KiB? 2MiB? 4MiB?
The real page sizes of x86 and x86-64 are 4 KiB for this linux kernel.
But the page sizes can be soft 8 KiB or 16 KiB or 32 KiB or 64 KiB
if it is implemented in the memory manager of the kernel.
But too they exist real page sizes of 2 MiB and 4 MiB that they have
some reserved entries of TLB in the specs of Intel/AMD processors
for these gigant pages.
On x86, it means 2/4 MiB, or even 1 GiB in some very strange
circumstances. Other architectures might be different.
-hpa
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