Date: Wed, 10 Mar 2010 15:50:38 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r204957 - in head/sys: amd64/amd64 i386/i386 Message-ID: <201003101550.o2AFocNF081419@svn.freebsd.org>
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Author: kib Date: Wed Mar 10 15:50:38 2010 New Revision: 204957 URL: http://svn.freebsd.org/changeset/base/204957 Log: Fall back to wbinvd when region for CLFLUSH is >= 2MB. Submitted by: Kevin Day <toasty dragondata com> Reviewed by: jhb MFC after: 2 weeks Modified: head/sys/amd64/amd64/pmap.c head/sys/i386/i386/pmap.c Modified: head/sys/amd64/amd64/pmap.c ============================================================================== --- head/sys/amd64/amd64/pmap.c Wed Mar 10 15:47:33 2010 (r204956) +++ head/sys/amd64/amd64/pmap.c Wed Mar 10 15:50:38 2010 (r204957) @@ -1105,7 +1105,8 @@ 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 @@ -1122,7 +1123,8 @@ 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 then 2MB. + * Globally invalidate cache. */ pmap_invalidate_cache(); } Modified: head/sys/i386/i386/pmap.c ============================================================================== --- head/sys/i386/i386/pmap.c Wed Mar 10 15:47:33 2010 (r204956) +++ head/sys/i386/i386/pmap.c Wed Mar 10 15:50:38 2010 (r204957) @@ -996,7 +996,8 @@ 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 @@ -1013,7 +1014,8 @@ 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 then 2MB. + * Globally invalidate cache. */ pmap_invalidate_cache(); }
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