From: "H. Peter Anvin" <hpa@linux.intel.com>
To: stefano.stabellini@eu.citrix.com
Cc: hpa@zytor.com, konrad.wilk@oracle.com, mingo@elte.hu,
linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com,
yinghai@kernel.org
Subject: Re: [PATCH 1/3] x86: calculate precisely the memory needed by init_memory_mapping
Date: Mon, 20 Jun 2011 15:37:33 -0700 [thread overview]
Message-ID: <4DFFCBAD.9040507@linux.intel.com> (raw)
In-Reply-To: <1307470409-7654-1-git-send-email-stefano.stabellini@eu.citrix.com>
On 06/07/2011 11:13 AM, stefano.stabellini@eu.citrix.com wrote:
>
> - remove the extra page added on x86_32 for the fixmap because is not
> needed: the PMD entry is already allocated and contiguous for the whole
> range (a PMD page covers 4G of virtual addresses) and the pte entry is
> already allocated by early_ioremap_init.
>
Hi Stefano,
I think this is wrong. A PMD page covers *1G* of virtual addresses, and
in the 2+2 and 1+3 memory configurations, we may or may not need a
separate PMD for the fixmap.
Am I missing something?
-hpa
next prev parent reply other threads:[~2011-06-20 22:38 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 18:13 [PATCH 0/3] x86: remove x86_init.mapping.pagetable_reserve Stefano Stabellini
2011-06-07 18:13 ` Stefano Stabellini
2011-06-07 18:13 ` [PATCH 1/3] x86: calculate precisely the memory needed by init_memory_mapping stefano.stabellini
2011-06-20 22:37 ` H. Peter Anvin [this message]
2011-06-21 17:57 ` Stefano Stabellini
2011-06-21 17:57 ` Stefano Stabellini
2011-06-21 18:02 ` H. Peter Anvin
2011-06-21 18:02 ` H. Peter Anvin
2011-06-21 20:37 ` [tip:x86/mm] x86, mm: Calculate " tip-bot for Stefano Stabellini
2011-06-07 18:13 ` [PATCH 2/3] Revert "x86,xen: introduce x86_init.mapping.pagetable_reserve" stefano.stabellini
2011-06-21 20:37 ` [tip:x86/mm] " tip-bot for Stefano Stabellini
2011-06-07 18:13 ` [PATCH 3/3] x86: move memblock_x86_reserve_range PGTABLE to find_early_table_space stefano.stabellini
2011-06-21 20:38 ` [tip:x86/mm] x86, init : Move " tip-bot for Stefano Stabellini
[not found] ` <m2n.s.1QU0lc-137774@chiark.greenend.org.uk>
2011-06-17 17:11 ` [Xen-devel] [PATCH 1/3] x86: calculate precisely the memory needed by init_memory_mapping Ian Jackson
2011-06-17 17:11 ` Ian Jackson
2011-06-20 19:16 ` Stefano Stabellini
2011-06-20 19:16 ` Stefano Stabellini
2011-06-21 20:58 ` [PATCH 0/3] x86: remove x86_init.mapping.pagetable_reserve Ingo Molnar
2011-06-22 17:16 ` Stefano Stabellini
2011-06-22 17:16 ` Stefano Stabellini
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