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Koen Kooi
9bc77dff5f
Regenerate all beaglebone patches and add one vfs tracer patch for powertop Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
57 lines
1.9 KiB
Diff
57 lines
1.9 KiB
Diff
From 04098d77869c04c5bf703846783cb89b4297b2bb Mon Sep 17 00:00:00 2001
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From: Vaibhav Nagarnaik <vnagarnaik@google.com>
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Date: Thu, 3 May 2012 18:59:52 -0700
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Subject: [PATCH 23/49] tracing: change CPU ring buffer state from
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tracing_cpumask
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commit 71babb2705e2203a64c27ede13ae3508a0d2c16c upstream.
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According to Documentation/trace/ftrace.txt:
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tracing_cpumask:
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This is a mask that lets the user only trace
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on specified CPUS. The format is a hex string
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representing the CPUS.
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The tracing_cpumask currently doesn't affect the tracing state of
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per-CPU ring buffers.
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This patch enables/disables CPU recording as its corresponding bit in
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tracing_cpumask is set/unset.
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Link: http://lkml.kernel.org/r/1336096792-25373-3-git-send-email-vnagarnaik@google.com
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Cc: Frederic Weisbecker <fweisbec@gmail.com>
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Cc: Ingo Molnar <mingo@redhat.com>
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Cc: Laurent Chavey <chavey@google.com>
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Cc: Justin Teravest <teravest@google.com>
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Cc: David Sharp <dhsharp@google.com>
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Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
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Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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---
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kernel/trace/trace.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
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index 7e4edd3..5638104 100644
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--- a/kernel/trace/trace.c
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+++ b/kernel/trace/trace.c
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@@ -2541,10 +2541,12 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
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if (cpumask_test_cpu(cpu, tracing_cpumask) &&
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!cpumask_test_cpu(cpu, tracing_cpumask_new)) {
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atomic_inc(&global_trace.data[cpu]->disabled);
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+ ring_buffer_record_disable_cpu(global_trace.buffer, cpu);
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}
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if (!cpumask_test_cpu(cpu, tracing_cpumask) &&
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cpumask_test_cpu(cpu, tracing_cpumask_new)) {
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atomic_dec(&global_trace.data[cpu]->disabled);
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+ ring_buffer_record_enable_cpu(global_trace.buffer, cpu);
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}
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}
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arch_spin_unlock(&ftrace_max_lock);
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--
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1.7.10
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