On (08/10/16 15:16), [email protected] wrote: > From: Joonsoo Kim <[email protected]> > > What debug_pagealloc does is just mapping/unmapping page table. > Basically, it doesn't need additional memory space to memorize something. > But, with guard page feature, it requires additional memory to distinguish > if the page is for guard or not. Guard page is only used when > debug_guardpage_minorder is non-zero so this patch removes additional > memory allocation (page_ext) if debug_guardpage_minorder is zero. > > It saves memory if we just use debug_pagealloc and not guard page. > > Signed-off-by: Joonsoo Kim <[email protected]>
Reviewed-by: Sergey Senozhatsky <[email protected]> -ss
