linux-kernel - Re: [PATCH 3/3] Limit E820 map when a user-defined memory map is specified

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Message-ID: <20080625180319.122819ea@halley.suse.de>
Date:	Wed, 25 Jun 2008 18:03:19 +0200
From:	Bernhard Walle <bwalle@...e.de>
To:	"Yinghai Lu" <yhlu.kernel@...il.com>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, vgoyal@...hat.com,
	kexec@...ts.infradead.org
Subject: Re: [PATCH 3/3] Limit E820 map when a user-defined memory map is
 specified

* Yinghai Lu [2008-06-25 09:01]:
> On Wed, Jun 25, 2008 at 5:02 AM, Bernhard Walle <bwalle@...e.de> wrote:
> >  }
> >  early_param("mem", parse_memopt);
> > @@ -1023,6 +1025,7 @@ static int __init parse_memmap_opt(char *p)
> >                e820_add_region(start_at, mem_size, E820_RESERVED);
> >        } else {
> >                end_user_pfn = (mem_size >> PAGE_SHIFT);
> > +               e820_update_range(mem_size, ULLONG_MAX, E820_RAM, E820_RESERVED);
> >        }
> >        return *p == '\0' ? 0 : -EINVAL;
> >  }
> > --
> 
> only this one is needed now. but please change ULLONG_MAX to
> ULLONG_MAX - mem_size

Why can't we add that check at the beginning of e820_update_range() as
you suggested?


Bernhard
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