On Thu, Mar 07, 2013 at 12:34:27AM -0500, Valdis.Kletnieks@xxxxxx 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 . > > > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
