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RE: [Xen-ia64-devel] Re: [PATCH]: ptc.ga for SMP-g

from [Xu, Anthony] [Permanent Link][Original]
To: "Isaku Yamahata" <yamahata@xxxxxxxxxxxxx>, "Tristan Gingold" <Tristan.Gingold@xxxxxxxx>
Subject: RE: [Xen-ia64-devel] Re: [PATCH]: ptc.ga for SMP-g
From: "Xu, Anthony" <anthony.xu@xxxxxxxxx>
Date: Fri, 31 Mar 2006 10:42:13 +0800
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Thread-topic: [Xen-ia64-devel] Re: [PATCH]: ptc.ga for SMP-g 
>From: Isaku Yamahata >Sent: 2006年3月31日 9:23
>> PAGE_OFFSET + 64MB is covered by a tr, isn't it ?
>
>[PAGE_OFFSET, PAGE_OFFSET + KERNEL_TR_PAGE_SIZE - 1] is covered.
>Here KERNEL_TR_PAGE_SIZE = 64MB which is defined
>in linux/asm-ia64/pgtable.h.
>
>For safety, please consider
>PAGE_OFFSET + KERNEL_TR_PAGE_SIZE * n + (small offsets).
>

This is true in x86.
But it is not true in ia64.

PAGE_OFFSET                     __IA64_UL_CONST(0xe000000000000000)
Linux kernel starts from 0xa000000100000000.

Thanks
Anthony
>--
>yamahata

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