Author: kib
Date: Wed Mar 24 09:45:17 2010
New Revision: 205582
URL: http://svn.freebsd.org/changeset/base/205582
Log:
MFC r204957:
Fall back to wbinvd when region for CLFLUSH is >= 2MB.
MFC r205334 (by avg):
Fix a typo in a comment.
Modified:
stable/8/sys/amd64/amd64/pmap.c
stable/8/sys/i386/i386/pmap.c
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
stable/8/sys/dev/xen/xenpci/ (props changed)
stable/8/sys/net/ (props changed)
stable/8/sys/netinet/ipfw/ (props changed)
Modified: stable/8/sys/amd64/amd64/pmap.c
==============================================================================
--- stable/8/sys/amd64/amd64/pmap.c Wed Mar 24 09:27:12 2010
(r205581)
+++ stable/8/sys/amd64/amd64/pmap.c Wed Mar 24 09:45:17 2010
(r205582)
@@ -941,7 +941,8 @@ pmap_invalidate_cache_range(vm_offset_t
if (cpu_feature & CPUID_SS)
; /* If "Self Snoop" is supported, do nothing. */
- else if (cpu_feature & CPUID_CLFSH) {
+ else if ((cpu_feature & CPUID_CLFSH) != 0 &&
+ eva - sva < 2 * 1024 * 1024) {
/*
* Otherwise, do per-cache line flush. Use the mfence
@@ -958,7 +959,8 @@ pmap_invalidate_cache_range(vm_offset_t
/*
* No targeted cache flush methods are supported by CPU,
- * globally invalidate cache as a last resort.
+ * or the supplied range is bigger than 2MB.
+ * Globally invalidate cache.
*/
pmap_invalidate_cache();
}
Modified: stable/8/sys/i386/i386/pmap.c
==============================================================================
--- stable/8/sys/i386/i386/pmap.c Wed Mar 24 09:27:12 2010
(r205581)
+++ stable/8/sys/i386/i386/pmap.c Wed Mar 24 09:45:17 2010
(r205582)
@@ -982,7 +982,8 @@ pmap_invalidate_cache_range(vm_offset_t
if (cpu_feature & CPUID_SS)
; /* If "Self Snoop" is supported, do nothing. */
- else if (cpu_feature & CPUID_CLFSH) {
+ else if ((cpu_feature & CPUID_CLFSH) != 0 &&
+ eva - sva < 2 * 1024 * 1024) {
/*
* Otherwise, do per-cache line flush. Use the mfence
@@ -999,7 +1000,8 @@ pmap_invalidate_cache_range(vm_offset_t
/*
* No targeted cache flush methods are supported by CPU,
- * globally invalidate cache as a last resort.
+ * or the supplied range is bigger than 2MB.
+ * Globally invalidate cache.
*/
pmap_invalidate_cache();
}
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