Messages in this thread Patch in this message | | | Date | Wed, 27 Jan 2021 16:57:40 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH v6 2/2] lib: stackdepot: Add support to disable stack depot |
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On Wed, 27 Jan 2021 17:36:38 +0530 vjitta@codeaurora.org wrote:
> 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 usecase 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.
CONFIG_STACKDEPOT=n:
main.c:(.init.text+0x4c1): undefined reference to `stack_depot_init'
--- a/include/linux/stackdepot.h~lib-stackdepot-add-support-to-disable-stack-depot-fix +++ a/include/linux/stackdepot.h @@ -21,5 +21,13 @@ unsigned int stack_depot_fetch(depot_sta 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 _
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