The kmemleak and debug_pagealloc features both disable using huge pages for direct mapping so they can do cpa() on page level granularity in any context. However they only do that for 2MB pages, which means 1GB pages can still be used if the CPU supports it, unless disabled by a boot param, which is non-obvious. Disable also 1GB pages when disabling 2MB pages. Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx> --- arch/x86/mm/init.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index cbc87ea98751..20282dfce0fa 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -170,6 +170,10 @@ static void __init probe_page_size_mask(void) */ if (boot_cpu_has(X86_FEATURE_PSE) && !debug_pagealloc_enabled()) page_size_mask |= 1 << PG_LEVEL_2M; + else + direct_gbpages = 0; +#else + direct_gbpages = 0; #endif /* Enable PSE if available */ -- 2.13.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
