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Marco Elver
11ac25c62c
Add __stack_depot_save(), which provides more fine-grained control over stackdepot's memory allocation behaviour, in case stackdepot runs out of "stack slabs". Normally stackdepot uses alloc_pages() in case it runs out of space; passing can_alloc==false to __stack_depot_save() prohibits this, at the cost of more likely failure to record a stack trace. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Marco Elver <[email protected]> Tested-by: Shuah Khan <[email protected]> Acked-by: Sebastian Andrzej Siewior <[email protected]> Reviewed-by: Andrey Konovalov <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: "Gustavo A. R. Silva" <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Taras Madan <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vijayanand Jitta <[email protected]> Cc: Vinayak Menon <[email protected]> Cc: Walter Wu <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
40 lines
926 B
C
40 lines
926 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* A generic stack depot implementation
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*
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* Author: Alexander Potapenko <[email protected]>
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* Copyright (C) 2016 Google, Inc.
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*
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* Based on code by Dmitry Chernenkov.
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*/
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#ifndef _LINUX_STACKDEPOT_H
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#define _LINUX_STACKDEPOT_H
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#include <linux/gfp.h>
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typedef u32 depot_stack_handle_t;
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depot_stack_handle_t __stack_depot_save(unsigned long *entries,
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unsigned int nr_entries,
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gfp_t gfp_flags, bool can_alloc);
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depot_stack_handle_t stack_depot_save(unsigned long *entries,
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unsigned int nr_entries, gfp_t gfp_flags);
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unsigned int stack_depot_fetch(depot_stack_handle_t handle,
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unsigned long **entries);
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unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries);
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#ifdef CONFIG_STACKDEPOT
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int stack_depot_init(void);
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#else
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static inline int stack_depot_init(void)
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{
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return 0;
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}
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#endif /* CONFIG_STACKDEPOT */
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#endif
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