diff options
| author | Aaro Koskinen <aaro.koskinen@nokia.com> | 2015-10-23 15:39:02 +0300 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-11-11 08:36:46 +0100 |
| commit | e1e1611598148e03c6d65e6c23338f4ff2cee71e (patch) | |
| tree | 060f9704cc326ffb3d3554b60751923a114f7eda /arch | |
| parent | 972cfd5502cc87d388a6d358eae717ac48ca4817 (diff) | |
MIPS: Add LATENCYTOP support
Add LATENCYTOP support for MIPS. Tested on OCTEON.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11353/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/Kconfig | 4 | ||||
| -rw-r--r-- | arch/mips/kernel/stacktrace.c | 27 |
2 files changed, 19 insertions, 12 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 2f45c866e7ca..10feb1520b0c 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2759,6 +2759,10 @@ config STACKTRACE_SUPPORT bool default y +config HAVE_LATENCYTOP_SUPPORT + bool + default y + config PGTABLE_LEVELS int default 3 if 64BIT && !PAGE_SIZE_64KB diff --git a/arch/mips/kernel/stacktrace.c b/arch/mips/kernel/stacktrace.c index 1ba775d24d38..506021f62549 100644 --- a/arch/mips/kernel/stacktrace.c +++ b/arch/mips/kernel/stacktrace.c @@ -12,14 +12,15 @@ * Save stack-backtrace addresses into a stack_trace buffer: */ static void save_raw_context_stack(struct stack_trace *trace, - unsigned long reg29) + unsigned long reg29, int savesched) { unsigned long *sp = (unsigned long *)reg29; unsigned long addr; while (!kstack_end(sp)) { addr = *sp++; - if (__kernel_text_address(addr)) { + if (__kernel_text_address(addr) && + (savesched || !in_sched_functions(addr))) { if (trace->skip > 0) trace->skip--; else @@ -31,7 +32,7 @@ static void save_raw_context_stack(struct stack_trace *trace, } static void save_context_stack(struct stack_trace *trace, - struct task_struct *tsk, struct pt_regs *regs) + struct task_struct *tsk, struct pt_regs *regs, int savesched) { unsigned long sp = regs->regs[29]; #ifdef CONFIG_KALLSYMS @@ -43,20 +44,22 @@ static void save_context_stack(struct stack_trace *trace, (unsigned long)task_stack_page(tsk); if (stack_page && sp >= stack_page && sp <= stack_page + THREAD_SIZE - 32) - save_raw_context_stack(trace, sp); + save_raw_context_stack(trace, sp, savesched); return; } do { - if (trace->skip > 0) - trace->skip--; - else - trace->entries[trace->nr_entries++] = pc; - if (trace->nr_entries >= trace->max_entries) - break; + if (savesched || !in_sched_functions(pc)) { + if (trace->skip > 0) + trace->skip--; + else + trace->entries[trace->nr_entries++] = pc; + if (trace->nr_entries >= trace->max_entries) + break; + } pc = unwind_stack(tsk, &sp, pc, &ra); } while (pc); #else - save_raw_context_stack(trace, sp); + save_raw_context_stack(trace, sp, savesched); #endif } @@ -82,6 +85,6 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) regs->cp0_epc = tsk->thread.reg31; } else prepare_frametrace(regs); - save_context_stack(trace, tsk, regs); + save_context_stack(trace, tsk, regs, tsk == current); } EXPORT_SYMBOL_GPL(save_stack_trace_tsk); |