From: "H. Peter Anvin" <hpa@zytor.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Rick van Rein <rick@vanrein.org>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 2.6.24] mm: BadRAM support for broken memory
Date: Tue, 04 Mar 2008 08:29:36 -0800 [thread overview]
Message-ID: <47CD78F0.2060802@zytor.com> (raw)
In-Reply-To: <20080304133028.GC32383@elte.hu>
Ingo Molnar wrote:
>>>
>> How is this different from:
>>
>> memmap=<size>$<len>
>>
>> ... ?
>
> it's the inverse? When we identify bad areas of RAM, we really want to
> "punch holes" into the existing memory map. So 'badram=' or
> 'excludemem=' would be nicer and easier to use.
>
> Or extend 'memmap=' with an inverse parameter: memmap=!0x10000000$1M
> would exclude a 1MB region at 256MB physical.
>
My understanding is that the $-form (as opposed to the @-form or #-form)
is exactly that:
memmap=nn[KMG]$ss[KMG]
[KNL,ACPI] Mark specific memory as reserved.
Region of memory to be used, from ss to ss+nn.
"Reserved" usually means "don't use as either memory or free address space".
-hpa
next prev parent reply other threads:[~2008-03-04 16:31 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-02 13:42 [PATCH 2.6.24] mm: BadRAM support for broken memory Rick van Rein
2008-03-02 17:01 ` KOSAKI Motohiro
2008-03-02 17:42 ` Rick van Rein
2008-03-03 3:21 ` KOSAKI Motohiro
2008-03-03 5:32 ` Nick Piggin
2008-03-03 7:14 ` KOSAKI Motohiro
2008-03-03 7:35 ` Nick Piggin
2008-03-03 9:49 ` KOSAKI Motohiro
2008-03-03 9:58 ` KAMEZAWA Hiroyuki
2008-03-02 17:53 ` Joseph Fannin
2008-03-02 19:34 ` Rick van Rein
2008-03-03 14:14 ` Pavel Machek
2008-03-03 16:41 ` KOSAKI Motohiro
2008-03-08 10:25 ` H. Peter Anvin
2008-03-08 10:30 ` H. Peter Anvin
2008-03-03 17:38 ` Randy Dunlap
[not found] ` <20080303082238.GB13580@elte.hu>
[not found] ` <47CC3005.5090706@zytor.com>
[not found] ` <20080304133028.GC32383@elte.hu>
2008-03-04 16:29 ` H. Peter Anvin [this message]
2008-03-04 16:47 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2008-03-04 12:21 devzero
2008-03-04 13:27 ` Ingo Molnar
2008-03-04 13:43 ` Rick van Rein
2008-03-04 14:06 ` Ingo Molnar
2008-03-04 15:05 ` Pavel Machek
2008-03-08 10:27 ` H. Peter Anvin
2008-03-08 11:13 ` Jiri Kosina
2008-03-10 10:12 ` Jan-Simon Möller
2008-03-10 11:24 ` Jan-Simon Möller
2008-03-10 11:52 ` Pavel Machek
2008-03-10 14:23 ` Jan-Simon Möller
2008-03-10 17:20 ` H. Peter Anvin
2008-03-10 17:48 ` Jan-Simon Möller
2008-03-10 18:59 ` Jan-Simon Möller
2008-03-10 19:16 ` Jan-Simon Möller
2008-03-10 22:56 ` Pavel Machek
2008-03-11 0:37 ` Jan-Simon Möller
2008-03-11 17:23 ` Len Brown
2008-03-11 17:49 ` Jan-Simon Möller
2008-03-11 19:24 ` Johannes Weiner
2008-03-11 20:00 ` Jan-Simon Möller
2008-03-10 22:07 ` Rick van Rein
2008-03-11 0:41 ` Jan-Simon Möller
2008-03-11 6:41 ` H. Peter Anvin
2008-03-04 14:00 devzero
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