From: "H. Peter Anvin" <hpa@zytor.com>
To: "J.C. Pizarro" <jcpiza@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: What means Hugepage? 8KiB,16KiB,..,2MiB or 4MiB?
Date: Tue, 25 Mar 2008 15:59:47 -0700 [thread overview]
Message-ID: <47E983E3.4050806@zytor.com> (raw)
In-Reply-To: <998d0e4a0803251503v7bf20ad4ndb0e21b1eead7f9d@mail.gmail.com>
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
prev parent reply other threads:[~2008-03-25 23:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-25 22:03 What means Hugepage? 8KiB,16KiB,..,2MiB or 4MiB? J.C. Pizarro
2008-03-25 22:59 ` H. Peter Anvin [this message]
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