From: june.tune.sea@gmail.com (ishare)
To: kernelnewbies@lists.kernelnewbies.org
Subject: zap_low_mappings
Date: Thu, 7 Mar 2013 19:50:10 +0800 [thread overview]
Message-ID: <20130307115009.GA2467@debian.localdomain> (raw)
In-Reply-To: <21409.1362634467@turing-police.cc.vt.edu>
On Thu, Mar 07, 2013 at 12:34:27AM -0500, Valdis.Kletnieks at vt.edu wrote:
> On Thu, 07 Mar 2013 12:48:06 +0800, ishare said:
>
> > because all the pde (0-768) are set to 0x0 ,so no phsical pages are mapping to these pde .
> > isn't it?
>
> The pdes don't end at 768. Think about what pde numbers the kernel gets when
> it loads at 0xc0000000 (which is where it lands with the default 3G/1G split).
Of course , the mapping of address above 0xc0000000 have not been effected ever ,
think about address 0x5 there is no phsical address mapping it .
>
>
>
prev parent reply other threads:[~2013-03-07 11:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-07 2:33 zap_low_mappings ishare
2013-03-07 3:19 ` zap_low_mappings Valdis.Kletnieks at vt.edu
2013-03-07 3:43 ` zap_low_mappings ishare
2013-03-07 4:00 ` zap_low_mappings Valdis.Kletnieks at vt.edu
2013-03-07 4:48 ` zap_low_mappings ishare
2013-03-07 5:34 ` zap_low_mappings Valdis.Kletnieks at vt.edu
2013-03-07 11:50 ` ishare [this message]
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