Virtuozzo ReadyKernel patch 133.0 for Virtuozzo Server 7.0, 7.5

Issue date: 2021-09-30

Applies to: Virtuozzo Server 7.0, Virtuozzo Server 7.5

Virtuozzo Advisory ID: VZA-2021-048

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with a stability fix. The patch applies to all supported kernels of Virtuozzo Server 7.

2. Bug Fixes

• [3.10.0-1062.12.1.vz7.131.10 to 3.10.0-1160.41.1.vz7.183.5] Memory allocation failed unexpectedly in __add_to_page_cache_locked(). Ext4 FS was unexpectedly remounted read-only in a container after the container reached the limits set in the memory cgroup. It happened because the relevant memory allocations failed in __add_to_page_cache_locked while __GFP_NOFAIL flag was dropped for certain reason. (PSBM-134323)

3. Installing the Update

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

4. References

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-131.10-133.0-1.vl7/
• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-151.14-133.0-1.vl7/
• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-158.8-133.0-1.vl7/
• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-163.46-133.0-1.vl7/
• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-174.13-133.0-1.vl7/
• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-183.5-133.0-1.vl7/

The new and updated packages are listed in the JSON file.