diff options
| author | Paul Mundt | 2008-09-13 01:44:03 +0900 |
|---|---|---|
| committer | Paul Mundt | 2008-09-13 01:44:03 +0900 |
| commit | 5a89f1adbc5ce44988aab0c370ae2f1478061307 (patch) | |
| tree | 934ea889b6fecd00eacaa18be210a063177f98b0 /arch/sh | |
| parent | 0e660d2d433393f983cd58fe8c54f831fa7c7713 (diff) | |
sh: latencytop support.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/Kconfig | 4 | ||||
| -rw-r--r-- | arch/sh/kernel/stacktrace.c | 23 |
2 files changed, 26 insertions, 1 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index acaba1bdd8a6..18a1cc8a6aa3 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -100,6 +100,10 @@ config STACKTRACE_SUPPORT config LOCKDEP_SUPPORT def_bool y +config HAVE_LATENCYTOP_SUPPORT + def_bool y + depends on !SMP + config ARCH_HAS_ILOG2_U32 def_bool n diff --git a/arch/sh/kernel/stacktrace.c b/arch/sh/kernel/stacktrace.c index 54d1f61aa007..1a2a5eb76e41 100644 --- a/arch/sh/kernel/stacktrace.c +++ b/arch/sh/kernel/stacktrace.c @@ -3,7 +3,7 @@ * * Stack trace management functions * - * Copyright (C) 2006 Paul Mundt + * Copyright (C) 2006 - 2008 Paul Mundt * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -36,3 +36,24 @@ void save_stack_trace(struct stack_trace *trace) } } EXPORT_SYMBOL_GPL(save_stack_trace); + +void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) +{ + unsigned long *sp = (unsigned long *)tsk->thread.sp; + + while (!kstack_end(sp)) { + unsigned long addr = *sp++; + + if (__kernel_text_address(addr)) { + if (in_sched_functions(addr)) + break; + if (trace->skip > 0) + trace->skip--; + else + trace->entries[trace->nr_entries++] = addr; + if (trace->nr_entries >= trace->max_entries) + break; + } + } +} +EXPORT_SYMBOL_GPL(save_stack_trace_tsk); |