From: Jeff Hartmann <jhartmann@valinux.com>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: linux-kernel@vger.kernel.org
Subject: Re: x86 PAT errata
Date: Thu, 25 Jan 2001 10:51:32 -0700 [thread overview]
Message-ID: <3A7067A4.7080206@valinux.com> (raw)
In-Reply-To: <200101251745.SAA07063@harpo.it.uu.se>
Mikael Pettersson wrote:
> Before people get too exited about the x86 Page Attribute Table ...
> Does Linux use mode B (CR4.PSE=1) or mode C (CR4.PAE=1) paging?
> If so, known P6 errata must be taken into account.
> In particular, Pentium III errata E27 and Pentium II errata A56
> imply that only the low four PAT entries are working for 4KB
> pages, if CR4.PSE or CR4.PAE is enabled.
>
> /Mikael
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> Please read the FAQ at http://www.tux.org/lkml/
Yes it does use PSE/PAE paging. Could you point me to these errata
documents? According to the documentation I've seen it says that only
the low four PAT entries work for 4MB pages. I've never seen
documentation that says the same is true for 4k pages.
-Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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Please read the FAQ at http://www.tux.org/lkml/
next prev parent reply other threads:[~2001-01-25 17:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-25 17:45 x86 PAT errata Mikael Pettersson
2001-01-25 17:51 ` Jeff Hartmann [this message]
2001-01-25 22:28 ` H. Peter Anvin
2001-01-26 0:35 ` Jeff Hartmann
-- strict thread matches above, loose matches on Subject: below --
2001-01-25 18:12 Mikael Pettersson
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