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Commit 766b2618 authored by Vinayak Menon's avatar Vinayak Menon Committed by Swathi Sridhar
Browse files

mm: allow page poisoning to be enabled by default. 



Add a config option to enable page poisoning by
default. The kernel command line option "page_poison"
can be used to change the behaviour during boot.

Change-Id: Ie70763841191a722b1c6125dfad119a29ed0f605
Signed-off-by: default avatarVinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: default avatarCharan Teja Reddy <charante@codeaurora.org>
[swatsrid@codeaurora.org: Fix merge errors and warnings]
Signed-off-by: default avatarSwathi Sridhar <swatsrid@codeaurora.org>
parent 5aabb433

mm/Kconfig.debug

+10 −0
Original line number Diff line number Diff line
@@ -54,6 +54,16 @@ config PAGE_POISONING 


	  If unsure, say N



config PAGE_POISONING_ENABLE_DEFAULT

	bool "Enable page poisoning by default?"

	default n

	depends on PAGE_POISONING

	help

	  Enable page poisoning of free pages by default? This value

	  can be overridden by page_poison=off|on. This can be used

	  to avoid passing the kernel parameter and let page poisoning

	  feature enabled by default.



config PAGE_POISONING_NO_SANITY

	depends on PAGE_POISONING

	bool "Only poison, don't sanity check"

mm/page_poison.c

+2 −1
Original line number Diff line number Diff line
@@ -7,7 +7,8 @@ 
#include <linux/poison.h>

#include <linux/ratelimit.h>



static bool want_page_poisoning __read_mostly;

static bool want_page_poisoning __read_mostly

		= IS_ENABLED(CONFIG_PAGE_POISONING_ENABLE_DEFAULT);



static int __init early_page_poison_param(char *buf)

{