Kernel update: new kernel 3.10.0-693.21.1.vz7.46.7, Virtuozzo 7.0 Update 7 Hotfix 2 (7.0.7-453)¶
Issue date: 2018-04-28
Applies to: Virtuozzo 7.0
Virtuozzo Advisory ID: VZA-2018-023
1. Overview¶
The Hotfix 2 for Virtuozzo 7.0 Update 7 provides a new kernel 3.10.0-693.21.1.vz7.46.7 that introduces stability and usability bug fixes. In addition, this kernel was recompiled by the updated gcc with retpolines support. Retpolines are a technique used by the kernel to reduce overhead of mitigating Spectre Variant 2 attacks described in CVE-2017-5715.
2. Bug Fixes¶
Loadavg reported incorrect values for containers with CPU CGroups. (PSBM-81572)
IPv6 routing tables incorrectly handled routing rules for throw routes. (PSBM-81798)
Container could stay mounted after ‘shutdown -h now’ had been run inside it. (PSBM-82766)
Fixed nodes crashing in various circumstances. (PSBM-82984, PSBM-83102, PSBM-83474)
prlctl could stop working on node due to dispatcher using too many file descriptors. (PSBM-83282)
Improved performance of inode extents shrinking in cases when many shrinkers are working on a single superblock simultaneously. (PSBM-83335)
VA Agent could crash due to a segmentation fault. (PSBM-83405)
3. Installing the Update¶
Install the update by running ‘yum update’.
The JSON file with the list of new and updated packages is available at http://docs.virtuozzo.com/vza/VZA-2018-023.json.