linux-kernel - Re: [Patch 1/1] x86 efi: Fill all reserved memmap entries if add_efi

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Date:	Thu, 13 May 2010 14:55:16 -0700
From:	Mike Travis <travis@....com>
To:	Yinghai <yinghai.lu@...cle.com>
CC:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jens Axboe <jens.axboe@...cle.com>,
	Jack Steiner <steiner@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Patch 1/1] x86 efi: Fill all reserved memmap entries if add_efi_memmap
 specified.



...
> in setup.c::setup_arch()
> 
>         setup_memory_map();
>         parse_setup_data();
>         /* update the e820_saved too */
>         e820_reserve_setup_data();
> 	...
> 	parse_early_param();
> 	...
> 	finish_e820_parsing();
> 
> 
> 
> efi memmap is appended to e820 by parse_setup_data
> e820_reserve_setup_data() will copy e820 to e820_saved.
> 
> 
> or do you have old boot loader 
> 
>         if (boot_params.hdr.version < 0x0209)
>                 return;
> 
> YH

I saw that too, and wondered why e820_saved did not
have the extra entries.   The comment indicates it
should.

I'm on the system tonight and will investigate this
further.

Thanks!
Mike
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