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Re: [Xen-devel] bad memory and xen

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] bad memory and xen
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Fri, 06 Aug 2004 10:37:24 +0100
Cc: Jody Belka <lists-xen@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 06 Aug 2004 10:40:45 +0100
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> > On Thu, Aug 05, 2004 at 11:12:13PM +0100, Keir Fraser wrote:
> > > 
> > > If it's in the lowest 64MB of memory then it would be tricky, as Xen
> > > has a fairly rigid memory map in that space during boot. Above 64MB we
> > > could add support for resreving bad memory pages so they can't be
> > > allocated for use.
> > 
> > That wouldn't be a problem here. My bad patch is up around the 750meg point 
> > :)
> > -- 
> > Jody Belka
> > knew (at) pimb (dot) org
> 
> I'll take a look. It shouldn't be very tricky to add.
> 
>  -- Keir

Okay, I checked in a command-line option for Xen:

 badpage=<page number>[,<page number>]*
          Specify a list of pages not to be allocated for use 
          because they contain bad bytes. For example, if your
          memory tester says that byte 0x12345678 is bad, you would
          place 'badpage=0x12345' on Xen's command line (i.e., the
          last three digits of the byte address are not included!).

 -- Keir


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