From 8aa49762dba3e8ce9a52a9b6da221e61a0c6de08 Mon Sep 17 00:00:00 2001 From: Changbin Du Date: Tue, 5 Mar 2019 15:46:19 -0800 Subject: mm/page_owner: move config option to mm/Kconfig.debug Move the PAGE_OWNER option from submenu "Compile-time checks and compiler options" to dedicated submenu "Memory Debugging". Link: http://lkml.kernel.org/r/20190120024254.6270-1-changbin.du@gmail.com Signed-off-by: Changbin Du Acked-by: Vlastimil Babka Cc: Masahiro Yamada Cc: Ingo Molnar Cc: Arnd Bergmann Cc: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/Kconfig.debug | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'mm/Kconfig.debug') diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index 9a7b8b049d04..e3df921208c0 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -39,6 +39,23 @@ config DEBUG_PAGEALLOC_ENABLE_DEFAULT Enable debug page memory allocations by default? This value can be overridden by debug_pagealloc=off|on. +config PAGE_OWNER + bool "Track page owner" + depends on DEBUG_KERNEL && STACKTRACE_SUPPORT + select DEBUG_FS + select STACKTRACE + select STACKDEPOT + select PAGE_EXTENSION + help + This keeps track of what call chain is the owner of a page, may + help to find bare alloc_page(s) leaks. Even if you include this + feature on your build, it is disabled in default. You should pass + "page_owner=on" to boot parameter in order to enable it. Eats + a fair amount of memory if enabled. See tools/vm/page_owner_sort.c + for user-space helper. + + If unsure, say N. + config PAGE_POISONING bool "Poison pages after freeing" select PAGE_POISONING_NO_SANITY if HIBERNATION -- cgit v1.2.3-59-g8ed1b