diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..fb05ce08
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,20 @@
+# Change Log
+
+## [2.1.2] - 2021-09-10
+- Fix bench merge mode rejecting sources spuriously on ignored sysreqs.
+- Improve visibility on merge fails.
+- Merge now only cares about the major and minor semantic versions and will
+  try merging results from e.g. 2.1.0, 2.1.1 and 2.1.2 together by default.
+- CHANGELOG added.
+
+## [2.1.1] - 2021-08-23
+- bench study mode fix.
+
+## [2.1.0] - 2021-08-23
+- iocost-tune solution criteria updated.
+
+## [2.0.0] - 2021-06-24
+- resctl-bench added.
+
+## [1.0.0] - 2020-10-13
+- resctl-demo initial release.
diff --git a/Cargo.lock b/Cargo.lock
index 364cd109..0d557646 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1401,7 +1401,7 @@ dependencies = [
 
 [[package]]
 name = "rd-agent"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1429,7 +1429,7 @@ dependencies = [
 
 [[package]]
 name = "rd-agent-intf"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1445,7 +1445,7 @@ dependencies = [
 
 [[package]]
 name = "rd-hashd"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1471,7 +1471,7 @@ dependencies = [
 
 [[package]]
 name = "rd-hashd-intf"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1483,7 +1483,7 @@ dependencies = [
 
 [[package]]
 name = "rd-util"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1566,7 +1566,7 @@ dependencies = [
 
 [[package]]
 name = "resctl-bench"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -1600,7 +1600,7 @@ dependencies = [
 
 [[package]]
 name = "resctl-bench-intf"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "clap",
@@ -1613,7 +1613,7 @@ dependencies = [
 
 [[package]]
 name = "resctl-demo"
-version = "2.1.1"
+version = "2.1.2"
 dependencies = [
  "anyhow",
  "chrono",
diff --git a/rd-agent-intf/Cargo.toml b/rd-agent-intf/Cargo.toml
index 46cd097a..6a3edbf1 100644
--- a/rd-agent-intf/Cargo.toml
+++ b/rd-agent-intf/Cargo.toml
@@ -1,7 +1,7 @@
 # Copyright (c) Facebook, Inc. and its affiliates
 [package]
 name = "rd-agent-intf"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/rd-agent/Cargo.toml b/rd-agent/Cargo.toml
index cd7ccc67..9a1aae26 100644
--- a/rd-agent/Cargo.toml
+++ b/rd-agent/Cargo.toml
@@ -1,7 +1,7 @@
 # Copyright (c) Facebook, Inc. and its affiliates
 [package]
 name = "rd-agent"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/rd-hashd-intf/Cargo.toml b/rd-hashd-intf/Cargo.toml
index fb71412e..742f03e6 100644
--- a/rd-hashd-intf/Cargo.toml
+++ b/rd-hashd-intf/Cargo.toml
@@ -1,7 +1,7 @@
 # Copyright (c) Facebook, Inc. and its affiliates
 [package]
 name = "rd-hashd-intf"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/rd-hashd/Cargo.toml b/rd-hashd/Cargo.toml
index 2d4aad26..4a7fd8c7 100644
--- a/rd-hashd/Cargo.toml
+++ b/rd-hashd/Cargo.toml
@@ -1,7 +1,7 @@
 # Copyright (c) Facebook, Inc. and its affiliates
 [package]
 name = "rd-hashd"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/rd-util/Cargo.toml b/rd-util/Cargo.toml
index a4228dd3..e98cabce 100644
--- a/rd-util/Cargo.toml
+++ b/rd-util/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rd-util"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/resctl-bench-intf/Cargo.toml b/resctl-bench-intf/Cargo.toml
index e2bce109..b7f0e852 100644
--- a/resctl-bench-intf/Cargo.toml
+++ b/resctl-bench-intf/Cargo.toml
@@ -1,7 +1,7 @@
 # Copyright (c) Facebook, Inc. and its affiliates
 [package]
 name = "resctl-bench-intf"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/resctl-bench/Cargo.toml b/resctl-bench/Cargo.toml
index 8da8371a..bdd74765 100644
--- a/resctl-bench/Cargo.toml
+++ b/resctl-bench/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "resctl-bench"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/resctl-demo/Cargo.toml b/resctl-demo/Cargo.toml
index 6571d1d6..704e3ce3 100644
--- a/resctl-demo/Cargo.toml
+++ b/resctl-demo/Cargo.toml
@@ -1,7 +1,7 @@
 # Copyright (c) Facebook, Inc. and its affiliates
 [package]
 name = "resctl-demo"
-version = "2.1.1"
+version = "2.1.2"
 authors = ["Tejun Heo <tj@kernel.org>"]
 edition = "2018"
 license = "Apache-2.0"