linux-kernel - Re: [PATCH] x86/pci: make pci_mem

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Message-ID: <49EA629C.1020307@kernel.org>
Date:	Sat, 18 Apr 2009 16:30:36 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org, yannick.roehlly@...e.fr
Subject: Re: [PATCH] x86/pci: make pci_mem_start to be aligned only -v4

Yinghai Lu wrote:
> Linus Torvalds wrote:
>> On Sat, 18 Apr 2009, Yinghai Lu wrote:
>>> without your patch got
>>>
>>> 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
>>>   b7ff0000-b7ffffff : RAM buffer
>>> b8000000-beffffff : PCI Bus #00
>>> bf000000-bfffffff : PCI Bus #80
>> Yeah, that "RAM buffer" inside the b7ff0000-b7ffffff reserved area is 
>> obviously crap.
> 
> reserved from 0xb7ff0000 - 0xffffffff ranges are registered via e820_reserve_resources_late
> didn't have IORESOURCE_BUSY
> 
> but RAM buffer area has that IORESOURCE_BUSY
> 
aka those "reserved" is not really reserved.

YH
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