[Xen-changelog] Add "set_pte_at_sync" (integrated invlpg) in Linux i386/mm/highmem.c to improve performance for domains with >900MB of memory.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User iap10@xxxxxxxxxxxxxxxxxxxxx
# Node ID 050bf85fb870a7c6c8ad052229a3bd35bebaf802
# Parent  08d19da852c73c82eaa8c87b741d22adbcf9a710
Add "set_pte_at_sync" (integrated invlpg) in Linux i386/mm/highmem.c to improve 
performance for domains with >900MB of memory.

Signed-off-by: ian@xxxxxxxxxxxxx

diff -r 08d19da852c7 -r 050bf85fb870 
linux-2.6-xen-sparse/arch/xen/i386/mm/highmem.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/mm/highmem.c   Sat Aug 13 21:26:49 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/mm/highmem.c   Sat Aug 13 21:52:46 2005
@@ -41,8 +41,7 @@
        if (!pte_none(*(kmap_pte-idx)))
                BUG();
 #endif
-       set_pte(kmap_pte-idx, mk_pte(page, prot));
-       __flush_tlb_one(vaddr);
+       set_pte_at_sync(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
 
        return (void*) vaddr;
 }
diff -r 08d19da852c7 -r 050bf85fb870 
linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h    Sat Aug 
13 21:26:49 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h    Sat Aug 
13 21:52:46 2005
@@ -22,6 +22,17 @@
         HYPERVISOR_update_va_mapping( (addr), (val), 0 ) )
     {
         set_pte(ptep, val);
+    }
+}
+
+inline static void set_pte_at_sync(struct mm_struct *mm, unsigned long addr, 
+                      pte_t *ptep, pte_t val )
+{
+    if ( ((mm != current->mm) && (mm != &init_mm)) ||
+        HYPERVISOR_update_va_mapping( (addr), (val), UVMF_INVLPG ) )
+    {
+        set_pte(ptep, val);
+       xen_invlpg(addr);
     }
 }
 
diff -r 08d19da852c7 -r 050bf85fb870 
linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h    Sat Aug 
13 21:26:49 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h    Sat Aug 
13 21:52:46 2005
@@ -76,6 +76,17 @@
         HYPERVISOR_update_va_mapping( (addr), (val), 0 ) )
     {
         set_pte(ptep, val);
+    }
+}
+
+inline static void set_pte_at_sync(struct mm_struct *mm, unsigned long addr, 
+                      pte_t *ptep, pte_t val )
+{
+    if ( ((mm != current->mm) && (mm != &init_mm)) ||
+        HYPERVISOR_update_va_mapping( (addr), (val), UVMF_INVLPG ) )
+    {
+        set_pte(ptep, val);
+       xen_invlpg(addr);
     }
 }
 

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog