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authorVijayanand Jitta <vjitta@codeaurora.org>2021-02-25 17:21:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-26 09:41:04 -0800
commite1fdc403349c64fa58f4c163f4bf9b860b4db808 (patch)
tree18d2e4c6908552dccc5069f3aa393e39f0ca9655 /init
parentd262093656a0eec6d6114a3178a9d887fddd0ded (diff)
lib: stackdepot: add support to disable stack depot
Add a kernel parameter stack_depot_disable to disable stack depot. So that stack hash table doesn't consume any memory when stack depot is disabled. The use case is CONFIG_PAGE_OWNER without page_owner=on. Without this patch, stackdepot will consume the memory for the hashtable. By default, it's 8M which is never trivial. With this option, in CONFIG_PAGE_OWNER configured system, page_owner=off, stack_depot_disable in kernel command line, we could save the wasted memory for the hashtable. [akpm@linux-foundation.org: fix CONFIG_STACKDEPOT=n build] Link: https://lkml.kernel.org/r/1611749198-24316-2-git-send-email-vjitta@codeaurora.org Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org> Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org> Cc: Alexander Potapenko <glider@google.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Yogesh Lal <ylal@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index 261051070e3c..3648c9f94882 100644
--- a/init/main.c
+++ b/init/main.c
@@ -97,6 +97,7 @@
#include <linux/mem_encrypt.h>
#include <linux/kcsan.h>
#include <linux/init_syscalls.h>
+#include <linux/stackdepot.h>
#include <asm/io.h>
#include <asm/bugs.h>
@@ -827,6 +828,7 @@ static void __init mm_init(void)
init_mem_debugging_and_hardening();
kfence_alloc_pool();
report_meminit();
+ stack_depot_init();
mem_init();
/* page_owner must be initialized after buddy is ready */
page_ext_init_flatmem_late();

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