mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Vijayanand Jitta](/assets/img/avatar_default.png)
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>
33 lines
768 B
C
33 lines
768 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* A generic stack depot implementation
|
|
*
|
|
* Author: Alexander Potapenko <glider@google.com>
|
|
* Copyright (C) 2016 Google, Inc.
|
|
*
|
|
* Based on code by Dmitry Chernenkov.
|
|
*/
|
|
|
|
#ifndef _LINUX_STACKDEPOT_H
|
|
#define _LINUX_STACKDEPOT_H
|
|
|
|
typedef u32 depot_stack_handle_t;
|
|
|
|
depot_stack_handle_t stack_depot_save(unsigned long *entries,
|
|
unsigned int nr_entries, gfp_t gfp_flags);
|
|
|
|
unsigned int stack_depot_fetch(depot_stack_handle_t handle,
|
|
unsigned long **entries);
|
|
|
|
unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries);
|
|
|
|
#ifdef CONFIG_STACKDEPOT
|
|
int stack_depot_init(void);
|
|
#else
|
|
static inline int stack_depot_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_STACKDEPOT */
|
|
|
|
#endif
|