Xen Project 4.8 Acknowledgements

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Icon Info.png Note that the Acknowledgements have been created based on 4.8.0-rc8 as the author of this page will likely be on vacation during the release. This means that a small number of contributions may be missed.


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 4.7 with Xen 4.8. 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 4.8 Hypervisor Total.

Attribute 4.7 Hypervisor Total [ 1 ] 4.8 Hypervisor Total [ 1 ] 4.8 Hypervisor Core[ 2 ] 4.8 Hypervisor Other [ 3 ] Drivers and Devices (other projects)[ 4 ]
Release Cycle 255 days
197 dev window/days[ 6 ]
8.4 months
161 days
124 dev window/days[ 6 ]
5.3 months
Development Velocity
Changesets 1887 1245 967 278 321
Series (=Features) [ 5 ] 1025 575
Average Size of Feature 1.84 2.17 (+15%)
Changes / Day 7.5 7.7 (+3%)
Changes / Dev Day [ 6 ] 9.6 10.0 (+4%)
Features / Day [ 5 ] 4.0 3.6 (-11%)
Code Review Statistics
Review Comments [ 5 ] 11628 6854
Review Comments / Day [ 5 ] 45.6 43.6 (-4%)
Comments / Series [ 5 ] 11.3 11.9 (+4%)
Code Churn
Lines Added 106606 78899 70833 8066 18421
Lines Removed 37160 62325 59502 2823 13775
Engagement
Individuals 102 68 68 5 59
Employers 36 34 33 4 37


4.8 Hypervisor Only Code Contributions [ 2 ]

Breakdown by Individual

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

Name Sortable.gif Lines Added Sortable.gif Lines Removed Sortable.gif Changesets Sortable.gif
Andrew Cooper 1605 1418 101
Anshul Makkar 89 28 3
Anthony PERARD 409 251 13
Bob Liu 1 1 1
Boris Ostrovsky 1933 724 36
Cedric Bosdonnat 5 5 1
Casion Woo 3 3 1
Chao Gao 1 1 1
Chris Patterson 27 2 2
Corneliu ZUZU 391 232 14
Daniel De Graaf 787 1103 20
Daniel Kiper 160 94 7
Dario Faggioli 2130 661 50
David Vrabel 1 7 1
Derek Straka 35 2 1
Dirk Behme 29 80 4
Dongli Zhang 73 22 4
Doug Goldstein 124 69 7
Edgar E. Iglesias 139 48 8
Elena Ufimtseva 1 1 1
Emanuel Czirai 14 1 1
Euan Harris 24 8 3
Feng Wu 1 1 1
George Dunlap 266 415 10
Haozhong Zhang 15 23 2
He Chen 152 50 2
Ian Jackson 46 91 13
Jacob Pan 28 0 1
Jan Beulich 4540 3049 164
Jiandi An 1 1 1
Jim Fehlig 6 2 1
Joao Martins 212 36 5
Jonathan Daugherty 2 2 2
Juergen Gross 2888 2178 49
Julien Grall 3441 2024 112
Kai Huang 24 22 1
Konrad Rzeszutek Wilk 2219 1064 50
Kyle Huey 100 6 2
Lan Tianyu 11 6 2
Lars Kurth 534 14 6
Len Brown 160 1 3
Luwei Kang 60 1 2
Marek Marczykowski-Górecki 45 1 3
Meng Xu 13 6 4
Mihai Dontu 58 2 1
Olaf Hering 26 2 2
Paul Durrant 192 137 3
Paul Lai 43 30 1
Paulina Szubarczyk 317 115 7
Peng Fan 6 11 6
Quan Xu 774 415 18
Razvan Cojocaru 410 125 7
Roger Pau Monne 153 75 16
Ronald Rojas 13 13 1
Ross Lagerwall 155 1 1
Rusty Bird 18 1 1
Shanker Donthineni 341 158 15
Shannon Zhao 782 43 18
Stefano Stabellini 47 6 5
Suravee Suthikulpanit 109 46 3
Tamas K Lengyel 1181 455 19
Tianyang Chen 56 50 2
Trammell Hudson 2 2 1
Vitaly Kuznetsov 8 0 1
Wei Chen 558 9 6
Wei Liu 42518 44048 117
Zhi Wang 321 4 1


4.8 Hypervisor Related Code Contributions [ 3 ]

Breakdown by Individual

Note that the table below does not cover contributions to Linux, NetBSD, FreeBSD, QEMU, libvirt and other related projects. It lists contributors to mini-os (formerly part of xen.git), osstest (our test code and test cases), raisin (a deployment and test tool) and livepatch-build-tools (tools to builld livepatch payloads).

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

Name Sortable.gif Lines Added Sortable.gif Lines Removed Sortable.gif Changesets Sortable.gif
Ian Jackson 3452 745 182
Juergen Gross 3778 1792 58
Konrad Rzeszutek Wilk 24 6 7
Ross Lagerwall 99 28 5
Wei Liu 713 252 28


Icon todo.png To Do:

Redo the stats as I forgot to include xtf.git which was new in Xen 4.8 - will have to do this post the 4.8 release


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

Breakdown by Individual

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

Name Sortable.gif Lines Added Sortable.gif Lines Removed Sortable.gif Changesets Sortable.gif
Andrey Grodzovsky 2 4 1
Anthony PERARD 6 7 2
Arnd Bergmann 3 3 1
Bryan Drewery 1 1 1
Ben Chalmers 88 25 5
Bhaktipriya Shridhar 3 25 2
Bob Liu 96 92 4
Manuel Bouyer 57 57 2
Bruce Rogers 1 1 1
Cao Jin 2 3 1
Christoph Hellwig 0 1 1
Christophe Ricard 19 17 4
Dan Williams 1 2 1
David Buches 9 1 1
David S. Miller 2 107 3
David Vrabel 297 411 6
Dmitry Torokhov 0 0 1
Dongli Zhang 4 4 2
Emil Condrea 661 583 13
Eric Blake 5 4 2
Eytan Heidingsfeld 5 0 1
Fabian Frederick 1 1 1
Fam Zheng 2 6 2
Filipe Manco 30 16 1
Gerd Hoffmann 3 0 1
Jan Beulich 108 151 21
Jaromír Dolecek 14 11 1
Jens Axboe 0 0 1
John Baldwin 2 0 1
Jung-uk Kim 0 0 1
Joerg Wunsch 4 1 1
John Snow 0 2 1
Juergen Gross 616 371 21
Kamil Rytarowski 72 5 1
KarimAllah Ahmed 11 84 1
Kevin Wolf 1 1 1
Konstantin Belousov 8 0 1
Robert Elz 9 1 1
Krzysztof Kozlowski 13 13 1
Linus Torvalds 0 0 16
Marc-Andre Lureau 38 41 6
Markus Armbruster 12 14 3
Maxime Villard 327 384 12
Masanobu SAITOH 71 70 2
Muhammad Falak R Wani 3 3 1
Nonaka Kimihiro 8 2 1
Olaf Hering 30 1 2
Owen Smith 2251 3552 22
Ryota Ozaki 2 3 1
Paul Durrant 11274 7362 127
Paul Gortmaker 1 1 1
Paulina Szubarczyk 162 5 1
Peter Maydell 0 0 3
Radim Krčmář 6 0 1
Ross Lagerwall 43 25 2
Roger Pau Monné 1599 87 8
Sebastian Andrzej Siewior 12 22 1
Shannon Zhao 379 165 9
Stefano Stabellini 2 2 1
Thomas Huth 1 1 1
Vitaly Kuznetsov 34 11 7
Vlastimil Babka 2 2 1
Wei Liu 6 0 1
Wei Yongjun 2 11 1


4.8 Hypervisor Reviewers [ 5 ]

Icon todo.png To Do:

Insert data - will have to do this post the 4.8 release


Footnotes

[ 1 ] Includes the following repos: xen, mini-os, osstest, raisin, livepatch-build-tools
[ 2 ] Includes the following repos: xen
[ 3 ] Includes the following repos: mini-os, osstest, raisin, livepatch-build-tools
[ 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