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File 0313-erts-Fix-erl-emu_flavor-docs-and-expand-BeamJit-perf.patch of Package erlang (Revision c698cd69bc2bea1d808e4837af05cc32)

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From 1ef78b6594ba11e0a7f91e37b0637fde88210cd5 Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Mon, 28 Jun 2021 11:42:41 +0200
Subject: [PATCH 3/3] erts: Fix erl -emu_flavor docs and expand BeamJit perf

---
 erts/doc/src/erl_cmd.xml              | 9 ++++++---
 erts/emulator/internal_doc/BeamAsm.md | 5 +++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/erts/doc/src/erl_cmd.xml b/erts/doc/src/erl_cmd.xml
index 5220663f92..7ef3ca88f9 100644
--- a/erts/doc/src/erl_cmd.xml
+++ b/erts/doc/src/erl_cmd.xml
@@ -304,10 +304,13 @@ $ <input>erl \
       <item>
         <p>Useful for debugging. Prints the arguments sent to the emulator.</p>
       </item>
-      <tag><c><![CDATA[-emu_flavor Flavor]]></c></tag>
+      <tag><c><![CDATA[-emu_flavor emu|jit|smp]]></c></tag>
       <item>
-        <p>Start an emulator of a different flavor. The current available flavors
-          are: <c>emu</c> and <c>jit</c>. You can combine this flag with
+        <p>Start an emulator of a different flavor. Normally only one flavor is
+          available, more can be added by building specific flavors. The currently
+          available flavors are: <c>emu</c> and <c>jit</c>.
+          The <c>smp</c> flavor is an alias for the current default flavor.
+          You can combine this flag with
           <c>--emu_type</c>. You can get the current flavor at run-time using
           <seeerl marker="erlang#system_info_emu_flavor">
             <c>erlang:system_info(emu_flavor)</c></seeerl>.
diff --git a/erts/emulator/internal_doc/BeamAsm.md b/erts/emulator/internal_doc/BeamAsm.md
index 4988126e62..3b4ac619ce 100644
--- a/erts/emulator/internal_doc/BeamAsm.md
+++ b/erts/emulator/internal_doc/BeamAsm.md
@@ -407,6 +407,11 @@ we have found useful:
     Create an archive with all the artifacts needed to inspect the data
     on another host. In early version of perf this command does not work,
     instead you can use [this bash script](https://github.com/torvalds/linux/blob/master/tools/perf/perf-archive.sh).
+* `perf report` gives "failed to process sample" and/or "failed to process type: 68"
+    This probably means that you are running a bugge version of perf. We have
+    seen this when running Ubuntu 18.04 with kernel version 4. If you update
+    to Ubuntu 20.04 or use Ubuntu 18.04 with kernel version 5 the problem
+    should go away.
 
 ## FAQ
 
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File 0313-erts-Fix-erl-emu_flavor-docs-and-expand-BeamJit-perf.patch of Package erlang (Revision c698cd69bc2bea1d808e4837af05cc32)

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