remap_pfn_range() not suitable for physical RAM?

From: Frank Mehnert
Date: Wed Mar 04 2009 - 14:26:10 EST


Hi,

since 2.6.29-rcX it seems to be not allowed anymore to use
remap_pfn_range() to remap physical RAM to userland. This restriction
applies only if CONFIG_X86_PAT is enabled. It seems that vm_insert_page()
does not have this restriction. Am I correct? And what is the reason
for this restriction?

Kind regards,

Frank
--
Dr.-Ing. Frank Mehnert Sun Microsystems http://www.sun.com/

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