30 lines
1.2 KiB
Diff
30 lines
1.2 KiB
Diff
From: Tom Zanussi <tom.zanussi@linux.intel.com>
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Date: Mon, 26 Jun 2017 17:49:12 -0500
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Subject: [PATCH 11/32] tracing: Add post-trigger flag to hist trigger command
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.11/older/patches-4.11.9-rt7.tar.xz
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Add EVENT_CMD_FL_POST_TRIGGER to the hist trigger cmd - it doesn't
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affect the hist trigger results, and allows further events such as
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synthetic events to be generated from a hist trigger.
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Without this change, generating an event from a hist trigger will
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cause the generated event to fail a ring buffer trace_recursive_lock()
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check and return without actually logging the event.
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/trace/trace_events_hist.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/kernel/trace/trace_events_hist.c
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+++ b/kernel/trace/trace_events_hist.c
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@@ -1676,7 +1676,7 @@ static int event_hist_trigger_func(struc
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static struct event_command trigger_hist_cmd = {
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.name = "hist",
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.trigger_type = ETT_EVENT_HIST,
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- .flags = EVENT_CMD_FL_NEEDS_REC,
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+ .flags = EVENT_CMD_FL_NEEDS_REC | EVENT_CMD_FL_POST_TRIGGER,
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.func = event_hist_trigger_func,
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.reg = hist_register_trigger,
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.unreg = hist_unregister_trigger,
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