From: "H. Peter Anvin" <hpa@zytor.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Yinghai Lu <yinghai@kernel.org>, Ingo Molnar <mingo@elte.hu>,
Jesse Barnes <jbarnes@virtuousgeek.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org, yannick.roehlly@free.fr
Subject: Re: [PATCH] x86/pci: make pci_mem_start to be aligned only -v4
Date: Sat, 18 Apr 2009 17:32:17 -0700 [thread overview]
Message-ID: <49EA7111.7040907@zytor.com> (raw)
In-Reply-To: <alpine.LFD.2.00.0904181602030.2199@localhost.localdomain>
Linus Torvalds wrote:
>>
>> 00000100-000973ff : System RAM
>> 00097400-0009ffff : reserved
>> 000a0000-000bffff : PCI Bus #00
>> 000c0000-000cffff : pnp 00:0c
>> 000e0000-000fffff : pnp 00:0c
>> 00100000-b7f9ffff : System RAM
>> 00200000-00c68f6b : Kernel code
>> 00c68f6c-01332f7f : Kernel data
>> 015a6000-01fcaa57 : Kernel bss
>> 20000000-23ffffff : GART
>> b7fa0000-b7fadfff : RAM buffer
>> b7fae000-b7faffff : System RAM
>> b7fb0000-b7fbdfff : ACPI Tables
>> b7fbe000-b7feffff : ACPI Non-volatile Storage
>> b7ff0000-b7ffffff : reserved
>
> Hmm. That looks correct to me. We filled in that odd area between
> b7fa0000-b7fadfff that went unmentioned in the e820 tables.
>
> And that _is_ a really odd hole. I wonder what it is all about. But the
> approach does seem to have done the right thing.
>
Looks to me as through the BIOS rounded the end of available memory to a
64K boundary after subtracting the ACPI storage. That might have been
done to work around an OS loader bug somewhere.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-04-19 0:34 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-11103-13546@http.bugzilla.kernel.org/>
[not found] ` <200904101913.n3AJDhMm018684@demeter.kernel.org>
2009-04-10 20:27 ` [Bug 11103] Can't use framebuffer or vesa Xorg with two memory modules Yinghai Lu
2009-04-11 3:29 ` Yinghai Lu
2009-04-14 20:49 ` [PATCH] pci: don't assume pref memio are 64bit -v2 Yinghai Lu
2009-04-14 20:50 ` [PATCH] x86/pci: make pci_mem_start to be aligned only Yinghai Lu
2009-04-14 21:10 ` Linus Torvalds
2009-04-14 21:27 ` H. Peter Anvin
2009-04-14 21:27 ` Yinghai Lu
2009-04-14 22:35 ` Yannick Roehlly
2009-04-15 0:29 ` [PATCH] x86/pci: make pci_mem_start to be aligned only -v2 Yinghai Lu
2009-04-15 0:41 ` [PATCH] x86/pci: make pci_mem_start to be aligned only -v3 Yinghai Lu
2009-04-15 0:42 ` [PATCH] x86/pci: fix -1 calling to e820_all_mapped with mmconfig Yinghai Lu
2009-04-16 16:31 ` [PATCH] x86/pci: make pci_mem_start to be aligned only -v3 Jesse Barnes
2009-04-16 16:44 ` Linus Torvalds
2009-04-16 16:56 ` Ingo Molnar
2009-04-16 17:18 ` Yinghai Lu
2009-04-16 17:27 ` H. Peter Anvin
2009-04-16 17:38 ` Ingo Molnar
2009-04-16 17:28 ` Ingo Molnar
2009-04-16 20:13 ` [PATCH] x86/pci: make pci_mem_start to be aligned only -v4 Yinghai Lu
2009-04-16 23:18 ` Linus Torvalds
2009-04-16 23:54 ` Ingo Molnar
2009-04-17 0:24 ` Linus Torvalds
2009-04-17 13:16 ` Ingo Molnar
2009-04-17 21:59 ` Yinghai Lu
2009-04-17 22:04 ` H. Peter Anvin
2009-04-18 5:37 ` [PATCH] pci: keep pci device resource name pointer right Yinghai Lu
2009-04-18 7:51 ` Ingo Molnar
2009-04-18 16:05 ` Jesse Barnes
2009-04-18 18:42 ` Linus Torvalds
2009-04-18 19:19 ` Yinghai Lu
2009-04-18 19:23 ` Greg KH
2009-04-18 20:00 ` Kay Sievers
2009-04-18 20:27 ` Kay Sievers
2009-04-18 20:37 ` Ingo Molnar
2009-04-18 22:05 ` [PATCH] driver: dont update dev_name via device_add path Yinghai Lu
2009-04-28 7:36 ` [PATCH] driver: make dev_set_name(, NULL) work Yinghai Lu
2009-04-28 7:42 ` [RFC PATCH] use dev_set_name(,NULL) to prevent leaking Yinghai Lu
2009-04-28 8:25 ` Kay Sievers
2009-04-28 15:21 ` Yinghai Lu
2009-04-28 15:34 ` Yinghai Lu
2009-04-28 15:39 ` Greg KH
2009-04-28 15:51 ` Yinghai Lu
2009-04-28 15:56 ` Kay Sievers
2009-04-28 16:08 ` Yinghai Lu
2009-04-28 16:15 ` Kay Sievers
2009-04-28 19:04 ` Yinghai Lu
2009-04-28 16:36 ` Yinghai Lu
2009-04-28 16:50 ` Kay Sievers
2009-04-28 14:52 ` Greg KH
2009-04-28 14:51 ` [PATCH] driver: make dev_set_name(, NULL) work Greg KH
2009-04-28 15:14 ` Yinghai Lu
2009-04-28 15:39 ` Greg KH
2009-04-18 21:07 ` [PATCH] pci: keep pci device resource name pointer right Yinghai Lu
2009-04-18 22:17 ` Linus Torvalds
2009-04-18 20:00 ` [PATCH] driver: dont update dev_name if it is not changed Yinghai Lu
2009-04-18 20:11 ` Ingo Molnar
2009-04-18 20:20 ` Yinghai Lu
2009-04-18 20:27 ` Ingo Molnar
2009-04-18 8:33 ` [PATCH] x86/pci: make pci_mem_start to be aligned only -v4 Yinghai Lu
2009-04-18 9:22 ` Ingo Molnar
2009-04-18 17:07 ` Yinghai Lu
2009-04-18 18:57 ` Linus Torvalds
2009-04-18 19:14 ` Ingo Molnar
2009-04-18 19:26 ` Yinghai Lu
2009-04-18 22:20 ` Yinghai Lu
2009-04-18 22:31 ` Linus Torvalds
2009-04-18 20:13 ` Ivan Kokshaysky
2009-04-18 18:50 ` Linus Torvalds
2009-04-18 22:44 ` Yinghai Lu
2009-04-18 23:01 ` Yinghai Lu
2009-04-18 23:06 ` Linus Torvalds
2009-04-18 23:26 ` Yinghai Lu
2009-04-18 23:30 ` Yinghai Lu
2009-04-18 23:04 ` Linus Torvalds
2009-04-19 0:32 ` H. Peter Anvin [this message]
2009-04-19 4:50 ` Linus Torvalds
2009-04-19 5:26 ` Yinghai Lu
2009-04-19 19:35 ` Yannick Roehlly
2009-04-19 19:59 ` Yinghai Lu
2009-04-19 20:24 ` Yannick Roehlly
2009-04-19 9:02 ` Ingo Molnar
2009-04-19 9:06 ` Ingo Molnar
2009-04-19 17:52 ` Jesse Barnes
2009-04-20 22:33 ` Ivan Kokshaysky
2009-04-20 22:52 ` Yinghai Lu
2009-04-21 10:54 ` Ivan Kokshaysky
2009-04-21 0:09 ` Yinghai Lu
2009-04-21 10:56 ` Ivan Kokshaysky
2009-04-21 15:57 ` Yinghai Lu
2009-04-22 22:37 ` [RFC PATCH 1/2] pci: don't assume pref memio are 64bit -v3 Yinghai Lu
2009-04-22 22:38 ` [RFC PATCH 2/2] pci: try to assign res for device under transparent bridges Yinghai Lu
2009-04-22 22:49 ` [RFC PATCH 1/2] pci: don't assume pref memio are 64bit -v3 Jesse Barnes
2009-04-23 0:49 ` Yinghai Lu
2009-04-23 1:05 ` Jesse Barnes
2009-04-23 2:03 ` Yinghai Lu
2009-04-23 12:58 ` Ivan Kokshaysky
2009-04-23 15:30 ` Yinghai Lu
2009-04-23 2:10 ` Yinghai Lu
2009-04-23 13:22 ` Ivan Kokshaysky
2009-04-23 15:13 ` Yinghai Lu
2009-04-23 22:19 ` Ivan Kokshaysky
2009-04-24 3:48 ` [PATCH 1/4] pci/x86: don't assume pref memio are 64bit -v4 Yinghai Lu
2009-04-24 3:49 ` [PATCH 2/4] pci: try to assign res for device under transparent bridges -v2 Yinghai Lu
2009-04-24 3:50 ` [PATCH 3/4] x86: reserve range near the ram Yinghai Lu
2009-04-24 3:50 ` [PATCH 4/4] x86/pci: make pci_mem_start to be aligned only -v5 Yinghai Lu
2009-04-24 13:16 ` [PATCH 1/4] pci/x86: don't assume pref memio are 64bit -v4 Ivan Kokshaysky
2009-05-05 18:52 ` Jesse Barnes
2009-05-06 12:33 ` Ingo Molnar
2009-05-06 15:06 ` [PATCH 1/2] x86: reserve range near the ram Yinghai Lu
2009-05-11 9:51 ` [tip:x86/mm] x86, e820, pci: reserve extra free space near end of RAM tip-bot for Linus Torvalds
2009-05-06 15:07 ` [PATCH 1/2] x86/pci: make pci_mem_start to be aligned only -v5 Yinghai Lu
2009-05-11 9:51 ` [tip:x86/mm] x86/pci: remove rounding quirk from e820_setup_gap() tip-bot for Yinghai Lu
2009-04-23 12:36 ` [RFC PATCH 1/2] pci: don't assume pref memio are 64bit -v3 Ivan Kokshaysky
2009-04-23 12:41 ` Ingo Molnar
2009-04-23 13:09 ` Ivan Kokshaysky
2009-04-23 15:05 ` Yinghai Lu
2009-04-21 15:41 ` [PATCH] x86/pci: make pci_mem_start to be aligned only -v4 Jesse Barnes
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