Xen Project 4.12 Acknowledgements

To Do: Complete during RC phase

Overview

As we have made significant changes to the xen source tree structure, we will count acknowledgements in line with RFC Xen 4.6 Acknowledgements.

The following table compares Xen 4.11 with Xen 4.12. We also cover changes to Xen only components in Linux, FreeBSD, NetBSD and QEMU in the "Drivers and Devices" column, which are primarily made by Xen Project developers. Note that the number is not part of the 4.12 Hypervisor Total.

Note: The data below shows a reduction in public code review activity, as well as development velocity. This figure is substantially skewed by a number of large and complex security related code series that were developed in private under security embargoes. In other words, the reduction signifies that we are doing fewer public reviews to satisfy requirements that allow project members to fix issues under security embargoes. In addition, we ported many of these changes - including code that enabled these series - to older releases of Xen to uphold our maintenance and security guarantees.

Attribute	4.11 Hypervisor Total [ 1 ]	4.12 Hypervisor Total [ 1 ]	4.12 Hypervisor Core [ 2 ]	4.12 Hypervisor Other [ 3 ]	Drivers and Devices (other projects) [ 4 ]
Release Cycle	222 days 139 dev window/days [ 6 ] 7.5 months	TODO days TODO dev window/days [ 6 ] TODO months
Development Velocity
Changesets	1206	TODO	TODO	TODO	TODO
Changesets (including backports) [ 8 ]	1971	TODO
Series (=Features) [ 5 ]	406	TODO
Average Size of Feature	3.0	TODO
Changes / Day	5.4	TODO
Changes / Dev Day [ 6 ]	8.7	TODO
Features / Day [ 5 ]	3.4	TODO
Code Review Statistics
Review Comments [ 5 ]	7058	TODO
Review Comments / Day [ 5 ]	31.8	TODO
Review Comments / Dev Day [ 6 ]	59.2	50.8
Comments / Series [ 5 ]	17.4	TODO
Code Churn
Lines Added	42862	TODD	TODO	TODO	TODO
Lines Removed	16030	TODD	TODO	TODO	TODO
Engagement
Individuals	62	TODD	TODO	TODO
Employers [ 7 ]	27	TODD	TODO	TODO

4.12 Hypervisor Only Code Contributions ^{[ 1 ]}

Breakdown by Individual

This table is sortable : please click on the icon besides the column header, to sort by a specific column.

Name	Changesets	Lines Added	Lines Removed

Code Contributions to Xen Related Drivers and Devices in Linux, NetBSD, FreeBSD ^{[ 4 ]}

Breakdown by Individual

This table is sortable : please click on the icon besides the column header, to sort by a specific column.

Name	Changesets	Lines Added	Lines Removed

4.12 Hypervisor Reviewers ^{[ 5 ]}

This table is sortable : please click on the icon besides the column header, to sort by a specific column. Note that in the table below, we only count review comments by community members other than comments by the author of a patch. We do not count replies and clarifications by the author of a patch that are made in response to review comments by others.

Name	Review Comments (excludes replies to own series)
TODO others (less than 10 review comments each)	TODO

Footnotes

^{[ 1 ]} Includes the following repos: xen, mini-os, osstest, raisin, livepatch-build-tools, xtf
^{[ 2 ]} Includes the following repos: xen
^{[ 3 ]} Includes the following repos: mini-os, osstest, raisin, livepatch-build-tools, xtf
^{[ 4 ]} Includes commits to the following Xen specific directories of the following upstream projects: linux: arch/*/xen/ arch/*/include/asm/xen/ drivers/xen/ drivers/*/*xen* include/xen/ arch/*/pci/*xen* ; netbsd: sys/arch/xen; freebsd: sys/dev/xen/ sys/x86/xen sys/xen/; qemu: xen* hw/i386/xen hw/xenpv hw/*/xen* hw/xen include/*/xen*, xen windows pv drivers
^{[ 5 ]} This data was extracted from the Xen Project Code Review Dashboard
^{[ 6 ]} These are the days/months during which we were not in code freeze
^{[ 7 ]} Only known employers are used. Unknown employers were discounted.
^{[ 8 ]} Includes backports to stable branches