Messages in this thread | | | Date | Mon, 12 Nov 2007 17:32:36 +0200 | From | Yoav Artzi <> | Subject | Re: PAGE_SIZE on 64bit and 32bit machines |
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Well, since the size of the kernel stack is one page, I figured it will grow when switching to 64-bit, because some of the types grow and a similar flow/stack will be bigger in 64-bit in comparison to 32-bit.
Keeping the page size at 4kb and so keeping the stack at 4kb is a bit dangerous. Isn't it?
I know that using one page for a kernel stack is a optional feature, but:
a) It's a good feature
b) It's already used by major distros, e.g. Red Hat
-------- Original Message --------
Subject: Re: PAGE_SIZE on 64bit and 32bit machines From: Jiri Slaby <jirislaby@gmail.com> To: Yoav Artzi <yoavar@checkpoint.com> Date: Monday, November 12, 2007 5:14:17 PM
> On 11/12/2007 03:39 PM, Yoav Artzi wrote: > >> According to my knowledge the PAGE_SIZE on 32bit architectures in 4KB. >> Logically, the PAGE_SIZE on 64bit architectures should be 8KB. That's at >> least the way I understand it. However, looking at the kernel code of >> x86_64, I see the PAGE_SIZE is 4KB. >> > > Yes, it stood unchanged, the only difference is 4-level page tables. > > >> Can anyone explain to me what am I missing here? >> > > What led you to that it must be 8k? > > regards, >
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