Xen Project 4.10 Acknowledgements
Note that the acknowledgements have been created based on 4.10.0-rc7, which are provisional. The table assumes we release on December 13th, 2017 based on 4.10.0-rc7 including some security fixes that are currently under embargo. These fixes are not included in these statistics.
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 4.9 with Xen 4.10. 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 4.10 Hypervisor Total.
| Attribute | 4.9 Hypervisor Total [ 1 ] | 4.10 Hypervisor Total [ 1 ] | 4.10 Hypervisor Core [ 2 ] | 4.10 Hypervisor Other [ 3 ] | Drivers and Devices (other projects) [ 4 ] |
|---|---|---|---|---|---|
| Release Cycle | 203 days 128 dev window/days [ 6 ] 6.3 months |
174 days [ 7 ] 111 dev window/days [ 6 ] 5.9 months |
|||
| Development Velocity | |||||
| Changesets | 1549 | 1250 | 1143 | 107 | 202 |
| Series (=Features) [ 5 ] | 807 | 525 | |||
| Average Size of Feature | 3.2 | 2.4 | |||
| Changes / Day | 7.6 | 7.2 (-6.2%) | |||
| Changes / Dev Day [ 6 ] | 12.1 | 11.2 (-7.5%) | |||
| Features / Day [ 5 ] | 4.0 | 3.0 | |||
| Code Review Statistics | |||||
| Review Comments [ 5 ] | 8349 | 6527 | |||
| Review Comments / Day [ 5 ] | 41.1 | 37.8 (-8.9%) | |||
| Review Comments / Dev Day [ 6 ] | 65.2 | 59.2 (-10.2%) | |||
| Comments / Series [ 5 ] | 17.4 | 12.5 (-38.7%) | |||
| Code Churn | |||||
| Lines Added | 82336 | 68199 (-20.7%) | 44135 | 24064 | 8577 |
| Lines Removed | 47014 | 25777 (-82.4%) | 23965 | 1812 | 6602 |
| Engagement | |||||
| Individuals | 85 | 80 (-7.5%) | |||
| Employers [ 8 ] | 29 | 31 (+6.5%) | |||
4.10 Hypervisor Only Code Contributions [ 2 ]
Breakdown by Individual
This table is sortable : please click on the 
icon besides the column header, to sort by a specific column.
| Name
|
Lines Added
|
Lines Removed
|
Changesets
|
|---|
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
|
Lines Added
|
Lines Removed
|
Changesets
|
|---|---|---|---|
| Alexey G | 11 | 2 | 1 |
| Alistair Francis | 4 | 3 | 2 |
| Annie Li | 8 | 2 | 1 |
| Anoob Soman | 1 | 1 | 1 |
| Anton Nefedov | 2 | 2 | 2 |
| Arnd Bergmann | 5 | 8 | 2 |
| Arvind Yadav | 1 | 1 | 1 |
| Bart Van Assche | 22 | 38 | 7 |
| Ben Chalmers | 10 | 6 | 2 |
| Bhumika Goyal | 2 | 2 | 1 |
| Boris Ostrovsky | 5 | 3 | 1 |
| Cherry G. Mathew | 140 | 475 | 4 |
| Christoph Hellwig | 2 | 14 | 2 |
| Christos Gkekas | 0 | 3 | 1 |
| Colin Ian King | 1 | 1 | 1 |
| David S. Miller | 0 | 0 | 3 |
| Dmitry Torokhov | 0 | 0 | 1 |
| Dongli Zhang | 11 | 8 | 1 |
| Eric Dumazet | 1 | 1 | 1 |
| Eric Mackay | 386 | 121 | 2 |
| Greg Kroah-Hartman | 20 | 24 | 1 |
| Greg Kurz | 2 | 1 | 1 |
| Gregory CLEMENT | 21 | 4 | 1 |
| Gustavo A. R. Silva | 2 | 2 | 1 |
| Hu Ziji | 70 | 7 | 2 |
| Ian Lepore | 0 | 5 | 1 |
| Igor Druzhinin | 214 | 59 | 5 |
| Jan Beulich | 10 | 1 | 1 |
| Jason A Harmening | 0 | 1 | 1 |
| Jens Axboe | 0 | 0 | 2 |
| Jérôme Glisse | 0 | 8 | 1 |
| Juergen Gross | 104 | 95 | 5 |
| Julien Grall | 3 | 4 | 1 |
| Junxiao Bi | 1 | 1 | 1 |
| Liang Yan | 5 | 1 | 2 |
| Linus Torvalds | 0 | 0 | 29 |
| Liu Shuo | 1 | 1 | 1 |
| Manuel Bouyer | 3 | 3 | 1 |
| Maxime Villard | 75 | 132 | 15 |
| Michal Hocko | 1 | 1 | 1 |
| Munehisa Kamata | 3 | 3 | 1 |
| Olaf Hering | 1 | 1 | 1 |
| Oleksandr Andrushchenko | 179 | 40 | 1 |
| Owen Smith | 5250 | 5137 | 28 |
| Paul Durrant | 280 | 188 | 12 |
| Peter Maydell | 12 | 5 | 5 |
| Peter Xu | 20 | 5 | 3 |
| Philippe Mathieu-Daudé | 1 | 1 | 1 |
| Punit Agrawal | 0 | 1 | 1 |
| Roger Pau Monné | 45 | 10 | 3 |
| Ross Lagerwall | 11 | 0 | 1 |
| Ryan Libby | 2 | 2 | 1 |
| Shawn Lin | 0 | 2 | 1 |
| Stefano Stabellini | 1506 | 115 | 22 |
| Thomas Gleixner | 2 | 4 | 1 |
| Tycho Andersen | 0 | 10 | 1 |
| Ulf Hansson | 0 | 0 | 1 |
| Vladimir Sementsov-Ogievskiy | 17 | 17 | 2 |
| Wengang Wang | 8 | 1 | 1 |
| Willem de Bruijn | 2 | 2 | 1 |
| Xiong Zhang | 1 | 0 | 1 |
| Zhoujie Wu | 93 | 17 | 3 |
4.10 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
|
|---|---|
| 314 others (less than 10 review comments each) | 534 |
| Alexandru Stefan | 15 |
| Andre Przywara | 42 |
| Andrew Cooper | 388 |
| Anthony Perard | 44 |
| Boris Ostrovsky | 239 |
| Brian Gerst | 10 |
| Bruce Richardson | 10 |
| Chao Gao | 39 |
| Chao P Peng | 19 |
| Daniel De Graaf | 26 |
| Daniel Kiper | 24 |
| Dario Faggioli | 97 |
| Dongli Zhang | 13 |
| Dou Liyang | 13 |
| Doug Goldstein | 15 |
| George Dunlap | 17 |
| Govinda Tatti | 13 |
| Haozhong Zhang | 13 |
| Ian Jackson | 247 |
| Igor Druzhinin | 22 |
| Ingo Molnar | 10 |
| Jan Beulich | 1167 |
| Jiri Slaby | 13 |
| Joao M Martins | 16 |
| Josh Poimboeuf | 16 |
| Juergen Gross | 527 |
| Julien Grall | 429 |
| Kevin Tian | 76 |
| Konrad Wilk | 100 |
| Manish Jaggi | 16 |
| Marek Marczykowski-Górecki | 17 |
| Meng Xu | 22 |
| Olaf Hering | 43 |
| Oleksandr Andrushchenko | 10 |
| Oleksandr Grytsov | 53 |
| Oleksandr Tyshchenko | 21 |
| Paolo Bonzini | 11 |
| Paul Durrant | 207 |
| Peter Zijlstra | 11 |
| Petre Pircalabu | 23 |
| Praveen Kumar | 10 |
| Razvan Cojocaru | 43 |
| Roger Pau Monne | 357 |
| Ross Lagerwall | 26 |
| Sergej Proskurin | 50 |
| Sergey Dyasli | 21 |
| Stefano Stabellini | 439 |
| Tamas K Lengyel | 52 |
| Thomas Gleixner | 15 |
| Thomas Lendacky | 10 |
| Tianyu Lan | 52 |
| Tim Deegan | 22 |
| Venu Busireddy | 11 |
| Volodymyr Babchuk | 35 |
| Waiman Long | 14 |
| Wei Chen | 14 |
| Wei Liu | 698 |
| Yi Y Sun | 123 |
| Zhongze Liu | 21 |
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 ] Calculated using 4.10.0-rc7. Note that the code freeze for this release was 4 weeks longer than expected, due to several security issues being fixed towards the end of the release cycle and were held under embargo.
[ 8 ] Only known employers are used. Unknown employers were discounted.
