90 lines
3.4 KiB
Diff
90 lines
3.4 KiB
Diff
From 241f130e3d3edb242e471114b6c994f98c32abf2 Mon Sep 17 00:00:00 2001
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Message-Id: <241f130e3d3edb242e471114b6c994f98c32abf2.1601675152.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Sun, 17 Jul 2011 21:56:42 +0200
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Subject: [PATCH 116/333] trace: Add migrate-disabled counter to tracing output
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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include/linux/trace_events.h | 2 ++
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kernel/trace/trace.c | 9 ++++++---
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kernel/trace/trace_events.c | 2 ++
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kernel/trace/trace_output.c | 5 +++++
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4 files changed, 15 insertions(+), 3 deletions(-)
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diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
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index 0643c083ed86..1cc4d2da954c 100644
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--- a/include/linux/trace_events.h
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+++ b/include/linux/trace_events.h
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@@ -62,6 +62,8 @@ struct trace_entry {
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unsigned char flags;
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unsigned char preempt_count;
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int pid;
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+ unsigned short migrate_disable;
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+ unsigned short padding;
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};
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#define TRACE_EVENT_TYPE_MAX \
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diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
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index 4966410bb0f4..a7b187f74f34 100644
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--- a/kernel/trace/trace.c
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+++ b/kernel/trace/trace.c
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@@ -2151,6 +2151,8 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags,
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((pc & SOFTIRQ_OFFSET) ? TRACE_FLAG_SOFTIRQ : 0) |
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(tif_need_resched() ? TRACE_FLAG_NEED_RESCHED : 0) |
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(test_preempt_need_resched() ? TRACE_FLAG_PREEMPT_RESCHED : 0);
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+
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+ entry->migrate_disable = (tsk) ? __migrate_disabled(tsk) & 0xFF : 0;
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}
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EXPORT_SYMBOL_GPL(tracing_generic_entry_update);
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@@ -3354,9 +3356,10 @@ static void print_lat_help_header(struct seq_file *m)
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"# | / _----=> need-resched \n"
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"# || / _---=> hardirq/softirq \n"
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"# ||| / _--=> preempt-depth \n"
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- "# |||| / delay \n"
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- "# cmd pid ||||| time | caller \n"
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- "# \\ / ||||| \\ | / \n");
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+ "# |||| / _--=> migrate-disable\n"
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+ "# ||||| / delay \n"
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+ "# cmd pid |||||| time | caller \n"
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+ "# \\ / ||||| \\ | / \n");
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}
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static void print_event_info(struct trace_buffer *buf, struct seq_file *m)
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diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
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index 27726121d332..7b59bc9077de 100644
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--- a/kernel/trace/trace_events.c
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+++ b/kernel/trace/trace_events.c
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@@ -188,6 +188,8 @@ static int trace_define_common_fields(void)
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__common_field(unsigned char, flags);
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__common_field(unsigned char, preempt_count);
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__common_field(int, pid);
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+ __common_field(unsigned short, migrate_disable);
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+ __common_field(unsigned short, padding);
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return ret;
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}
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diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
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index 6e6cc64faa38..46c96744f09d 100644
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--- a/kernel/trace/trace_output.c
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+++ b/kernel/trace/trace_output.c
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@@ -494,6 +494,11 @@ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
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else
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trace_seq_putc(s, '.');
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+ if (entry->migrate_disable)
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+ trace_seq_printf(s, "%x", entry->migrate_disable);
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+ else
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+ trace_seq_putc(s, '.');
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+
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return !trace_seq_has_overflowed(s);
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}
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--
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2.17.1
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