svn commit: r267855 - projects/amd64_xen_pv/sys/vm

[Cherry G. Mathew]

Author: cherry
Date: Wed Jun 25 08:45:35 2014
New Revision: 267855
URL: http://svnweb.freebsd.org/changeset/base/267855

Log:
  On XEN PV, in order to include reclaimed startup/bootstrap pages, we
  need to set low_water to 0, unlike on native.
  
  XEN on amd64  uses the direct map, so include all mapped kernel pages
  in the crash dump, just like native.
  
  Approved by: gibbs(implicit)

Modified:
  projects/amd64_xen_pv/sys/vm/vm_page.c

Modified: projects/amd64_xen_pv/sys/vm/vm_page.c
==============================================================================
--- projects/amd64_xen_pv/sys/vm/vm_page.c	Wed Jun 25 07:57:01 2014	(r267854)
+++ projects/amd64_xen_pv/sys/vm/vm_page.c	Wed Jun 25 08:45:35 2014	(r267855)
@@ -323,7 +323,7 @@ vm_page_startup(vm_offset_t vaddr)
 			high_water = phys_avail[i + 1];
 	}
 
-#if defined(XEN) && !defined(__amd64__)
+#if defined(XEN)
 	low_water = 0;
 #endif	
 
@@ -423,7 +423,7 @@ vm_page_startup(vm_offset_t vaddr)
 	 */
 	new_end = vm_reserv_startup(&vaddr, new_end, high_water);
 #endif
-#if defined(__amd64__) && !defined(XEN) || defined(__mips__) 
+#if defined(__amd64__) || defined(__mips__) 
 	/*
 	 * pmap_map on amd64 and mips can come out of the direct-map, not kvm
 	 * like i386, so the pages must be tracked for a crashdump to include