diff options
| -rw-r--r-- | tools/testing/selftests/mm/va_high_addr_switch.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/tools/testing/selftests/mm/va_high_addr_switch.c b/tools/testing/selftests/mm/va_high_addr_switch.c index 6679213effed..7cfaf4a74c57 100644 --- a/tools/testing/selftests/mm/va_high_addr_switch.c +++ b/tools/testing/selftests/mm/va_high_addr_switch.c @@ -30,8 +30,8 @@ #endif /* - * >= 128TB is the hint addr value we used to select - * large address space. + * The hint addr value is used to allocate addresses + * beyond the high address switch boundary. */ #define ADDR_MARK_128TB (1UL << 47) @@ -73,9 +73,10 @@ static struct testcase testcases[] = { }, { /* - * We should never allocate at the requested address or above it - * The len cross the 128TB boundary. Without MAP_FIXED - * we will always search in the lower address space. + * Unless MAP_FIXED is specified, allocation based on hint + * addr is never at requested address or above it, which is + * beyond high address switch boundary in this case. Instead, + * a suitable allocation is found in lower address space. */ .addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)), .size = 2 * PAGE_SIZE, @@ -85,8 +86,8 @@ static struct testcase testcases[] = { }, { /* - * Exact mapping at 128TB, the area is free we should get that - * even without MAP_FIXED. + * Exact mapping at high address switch boundary, should + * be obtained even without MAP_FIXED as area is free. */ .addr = ((void *)(ADDR_SWITCH_HINT)), .size = PAGE_SIZE, |