From b9ff4e536d767d8829bd95c23b223196eb590686 Mon Sep 17 00:00:00 2001
From: Rolf Neugebauer <rolf.neugebauer@docker.com>
Date: Thu, 7 Sep 2017 18:02:08 +0100
Subject: [PATCH] blueprints: Use kernel 4.11.1 for LCOW (for now)

Newer 4.11.x kernels seem to trigger a bug (either in Linux or the
NVDIMM backend in Hyper-V) which causes silent failures of the
container VM.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
---
 blueprints/lcow.yml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/blueprints/lcow.yml b/blueprints/lcow.yml
index f0ffc8ea0..d1114a2af 100644
--- a/blueprints/lcow.yml
+++ b/blueprints/lcow.yml
@@ -1,5 +1,10 @@
+# We specifically pick 4.11.1 here as newer 4.11.x kernel have some
+# interactions with the current Hyper-V NVDIMM implementation.
+# Specifically, Linux commit 5a3651b4a92c ("ext4: return to starting
+# transaction in ext4_dax_huge_fault()") seems to trigger silent failures
+# when running the Hyper-V container VM.
 kernel:
-  image: linuxkit/kernel:4.11.12-f3fa7c62a28c70ada944121a8579290ad5b8bfb2
+  image: linuxkit/kernel:4.11.1-ce8345023d3f2dff16f8edeeca9331b26a199949
   cmdline: "console=ttyS0"
   tar: none
 init: