Module Name:    src
Committed By:   bouyer
Date:           Sat Mar 17 19:41:02 UTC 2012

Modified Files:
        src/doc [netbsd-4]: CHANGES-4.1

Log Message:
ticket 1443


To generate a diff of this commit:
cvs rdiff -u -r1.1.2.235 -r1.1.2.236 src/doc/CHANGES-4.1

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/doc/CHANGES-4.1
diff -u src/doc/CHANGES-4.1:1.1.2.235 src/doc/CHANGES-4.1:1.1.2.236
--- src/doc/CHANGES-4.1:1.1.2.235	Fri Mar  2 17:47:48 2012
+++ src/doc/CHANGES-4.1	Sat Mar 17 19:41:02 2012
@@ -1,4 +1,4 @@
-#	$NetBSD: CHANGES-4.1,v 1.1.2.235 2012/03/02 17:47:48 riz Exp $
+#	$NetBSD: CHANGES-4.1,v 1.1.2.236 2012/03/17 19:41:02 bouyer Exp $
 
 A complete list of changes from the NetBSD 4.0 release to the NetBSD 4.1
 release:
@@ -4600,3 +4600,21 @@ share/zoneinfo/zone.tab				patch
 	Update to tzdata2012b.
 	[apb, ticket #1442]
 
+doc/HACKS					1.123 via patch
+sys/arch/sparc64/conf/Makefile.sparc64		1.71 via patch
+sys/arch/sparc64/conf/files.sparc64		1.138 via patch
+sys/arch/sparc64/sparc64/locore.s		1.340 via patch
+
+	Fix the root cause of the hack "disable optimizations for uvm_bio.c
+	on 32 bit kernels".
+
+	gcc converts a division in the calculation of UBC_UMAP_ADDR macro
+	to multiplication (smul or combination of add/sll), and the
+	register of its result contains a garbage in upper 32 bits (the
+	upper 32 bits of smul/add/sll's result isn't zero cleared).
+
+	Then it passes to pseg_get{,_real} through pmap_extract without the
+	zero clear of upper 32 bits in the optimization case.  So the
+	result of pseg_get and pmap_extact sometimes gets screwed up.
+	[nakayama, ticket #1443]
+

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