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authorJohn Högberg <[email protected]>2018-02-26 12:49:57 +0100
committerJohn Högberg <[email protected]>2018-03-23 09:50:59 +0100
commit06ed628dfd013010dd6e182508c1137b9f4ba09b (patch)
tree91dd86094c4e7d9383fc542d9cff7e818b6983e2 /lib/kernel/doc
parentd77f0bdb55fd1bd36c4f19ab78cb02177d365b12 (diff)
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Lift the type restrictions on seq_trace token labels
OTP-14899
Diffstat (limited to 'lib/kernel/doc')
-rw-r--r--lib/kernel/doc/src/seq_trace.xml9
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/kernel/doc/src/seq_trace.xml b/lib/kernel/doc/src/seq_trace.xml
index 197851021f..69eb12a8a0 100644
--- a/lib/kernel/doc/src/seq_trace.xml
+++ b/lib/kernel/doc/src/seq_trace.xml
@@ -80,13 +80,18 @@ seq_trace:set_token(OldToken), % activate the trace token again
<p>Sets the individual <c><anno>Component</anno></c> of the trace token to
<c><anno>Val</anno></c>. Returns the previous value of the component.</p>
<taglist>
- <tag><c>set_token(label, <anno>Integer</anno>)</c></tag>
+ <tag><c>set_token(label, <anno>Label</anno>)</c></tag>
<item>
- <p>The <c>label</c> component is an integer which
+ <p>The <c>label</c> component is a term which
identifies all events belonging to the same sequential
trace. If several sequential traces can be active
simultaneously, <c>label</c> is used to identify
the separate traces. Default is 0.</p>
+ <warning>
+ <p>Labels were restricted to small signed integers (28 bits)
+ prior to OTP 21. The trace token will be silenty dropped if it
+ crosses over to a node that does not support the label.</p>
+ </warning>
</item>
<tag><c>set_token(serial, SerialValue)</c></tag>
<item>