Kernel update: Virtuozzo ReadyKernel patch 114.2 for Virtuozzo Hybrid Server 7.0

Issue date: 2020-08-24

Applies to: Virtuozzo Hybrid Server 7.0

Virtuozzo Advisory ID: VZA-2020-059

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with stability fixes. The patch applies to the kernels 3.10.0-1062.12.1.vz7.131.10 (Virtuozzo Hybrid Server 7.0.13), 3.10.0-1127.8.2.vz7.151.14 (Virtuozzo Hybrid Server 7.0.14).

2. Bug Fixes

  • [3.10.0-1062.12.1.vz7.131.10 to 3.10.0-1127.8.2.vz7.151.14] Memory reclaim could become too slow leading to high LA on the nodes. The original fix for PSBM-99181 and related issues introduced a problem: management of shrinkers used to reclaim memory could become very inefficient in certain cases, causing higher load on the affected nodes. (PSBM-99181)

  • [3.10.0-1062.12.1.vz7.131.10 to 3.10.0-1127.8.2.vz7.151.14] nf_conntrack: potential kernel crash in nf_ct_gre_keymap_destroy(). (PSBM-106273)

3. Installing the Update

Download, install, and immediately apply the patch to the current kernel by running ‘readykernel update’.