diff options
| -rw-r--r-- | sys/amd64/amd64/pmap.c | 6 | ||||
| -rw-r--r-- | sys/i386/i386/pmap.c | 6 |
2 files changed, 8 insertions, 4 deletions
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index c4e6a3b..0be5e29 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -1105,7 +1105,8 @@ pmap_invalidate_cache_range(vm_offset_t sva, vm_offset_t eva) 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 sva, vm_offset_t eva) /* * 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(); } diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c index 4b2e34f..f448071 100644 --- a/sys/i386/i386/pmap.c +++ b/sys/i386/i386/pmap.c @@ -996,7 +996,8 @@ pmap_invalidate_cache_range(vm_offset_t sva, vm_offset_t eva) 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 sva, vm_offset_t eva) /* * 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(); } |
