[PATCH v2 4/4] nmi_backtrace: generate one-line reports for idle cpus
From: peterz@infradead.org (Peter Zijlstra)
Date: 2016-03-21 15:42:06
Also in:
linux-arch, lkml
On Wed, Mar 16, 2016 at 01:02:13PM -0400, Chris Metcalf wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 9f7c21c22477..d569ae7fde37 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c@@ -298,7 +298,7 @@ void arch_cpu_idle(void) /* * We use this if we don't have any better idle routine.. */ -void default_idle(void) +void __cpuidle default_idle(void) { trace_cpu_idle_rcuidle(1, smp_processor_id()); safe_halt();@@ -413,7 +413,7 @@ static int prefer_mwait_c1_over_halt(const struct cpuinfo_x86 *c) * with interrupts enabled and no flags, which is backwards compatible with the * original MWAIT implementation. */ -static void mwait_idle(void) +static __cpuidle void mwait_idle(void) { if (!current_set_polling_and_test()) { trace_cpu_idle_rcuidle(1, smp_processor_id());
The most common idle function for x86 is: mwait_idle_with_hints(), trouble is, its an inline, so I'm not sure adding __cpuidle to it does anything. I've yet to find the magic objdump incantation to check. Or rather objdump -h doesn't appear to list .cpuidle.text at all :/ I'm probably doing something silly...