Date: Thu, 04 Nov 2010 13:07:29 +0200 From: Andriy Gapon <avg@freebsd.org> To: Alan Cox <alc@rice.edu> Cc: Alan Cox <alc@freebsd.org>, freebsd-current@freebsd.org Subject: Re: minidump size on amd64 Message-ID: <4CD293F1.8040000@freebsd.org> In-Reply-To: <4CD24D37.5060701@rice.edu> References: <4CA0DA49.2090006@freebsd.org> <4CA3A48A.5070300@freebsd.org> <4CA3BD1E.5070807@rice.edu> <4CA5911E.3000101@freebsd.org> <4CAE0060.7050607@freebsd.org> <4CAECC4D.90707@rice.edu> <4CD1AA45.7000504@freebsd.org> <4CD1AD80.2090903@rice.edu> <4CD1B02E.2070708@freebsd.org> <4CD24D37.5060701@rice.edu>
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on 04/11/2010 08:05 Alan Cox said the following: > > There is actually a point to using PG_PS_FRAME. The PAT bit for a 2MB page > mapping occupies a bit that is a part of the physical page number with PG_FRAME. > I suspect that the same is true of 1GB page mappings, but I haven't double checked > the manual. Ah, yes, you are right - bit 12 is a part of an address in PTE, but is used for PAT in PDE or PDPE if PS bit is 1. -- Andriy Gapon
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