--- a/include/linux/gfp.h~mm-make-it-clear-that-gfp-reclaim-modifiers-are-valid-only-for-sleepable-allocations +++ a/include/linux/gfp.h @@ -124,6 +124,8 @@ struct vm_area_struct; * * Reclaim modifiers * ~~~~~~~~~~~~~~~~~ + * Please note that all the following flags are only applicable to sleepable + * allocations (e.g. %GFP_NOWAIT and %GFP_ATOMIC will ignore them). * * %__GFP_IO can start physical IO. *