From 3a1f39e1de3d003782cc40c13c29ccc73e23f550 Mon Sep 17 00:00:00 2001
From: Austin Seipp <aseipp@pobox.com>
Date: Fri, 22 Feb 2019 11:19:36 -0600
Subject: [PATCH] kernel: enable pressure stall information on 4.20+

Closes #56207.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
---
 pkgs/os-specific/linux/kernel/common-config.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 61dbf2393bb..18911044579 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -636,6 +636,8 @@ let
       MLX4_EN_VXLAN = whenOlder "4.8" yes;
       MLX5_CORE_EN       = option yes;
 
+      PSI = whenAtLeast "4.20" yes;
+
       MODVERSIONS        = whenOlder "4.9" yes;
       MOUSE_PS2_ELANTECH = yes; # Elantech PS/2 protocol extension
       MTRR_SANITIZER     = yes;