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[Xen-devel] What "PDX" stands for in xen source code.


  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: john selliatel <john.selliatel@xxxxxxxxx>
  • Date: Fri, 27 Aug 2010 10:40:16 +0200
  • Delivery-date: Fri, 27 Aug 2010 01:41:22 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Hello,

Excuse my very naive questions!

What "PDX" stands for in xen source code ? ( as in "PDX_GROUP_COUNT" )

and in this _expression_
"#define PDX_GROUP_COUNT ((1 << L2_PAGETABLE_SHIFT) / (sizeof(*frame_table) & -sizeof(*frame_table)))" , what is the meaning of "(sizeof(*frame_table) & -sizeof(*frame_table))" ?
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