Xen Project 4.9 Acknowledgements
Note that the acknowledgements have been created based on 4.9.0-rc9, which is expected to be the final RC for Xen 4.9.0 (with the exception of some security fixes under embargo). If there is another release candidate, data needs to be updated.
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 4.8 with Xen 4.9. 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 4.9 Hypervisor Total.
| Attribute | 4.8 Hypervisor Total [ 1 ] | 4.9 Hypervisor Total [ 1 ] | 4.9 Hypervisor Core [ 2 ] | 4.9 Hypervisor Other [ 3 ] | Drivers and Devices (other projects) [ 4 ] |
|---|---|---|---|---|---|
| Release Cycle | 161 days 124 dev window/days [ 6 ] 5.3 months |
203 days [ 7 ] 128 dev window/days [ 6 ] 6.3 months |
|||
| Development Velocity | |||||
| Changesets | 1245 | 1549 (+19.6%) | 1316 | 233 | 285 |
| Series (=Features) [ 5 ] | 575 | 481 (-19.5%) | |||
| Average Size of Feature | 2.17 | 3.22 (+32.6%) | |||
| Changes / Day | 7.7 | 7.6 (-0.9%) | |||
| Changes / Dev Day [ 6 ] | 10.0 | 12.1 (+17.4%) | |||
| Features / Day [ 5 ] | 3.6 | 2.4 (-51.9%) | |||
| Code Review Statistics | |||||
| Review Comments [ 5 ] | 6960 | 8349 (+16.6%) | |||
| Review Comments / Day [ 5 ] | 43.6 | 41.1 (-6.0%) | |||
| Review Comments / Dev Day [ 6 ] | 56.1 | 65.2 (+13.9%) | |||
| Comments / Series [ 5 ] | 11.9 | 17.4 (+31.4%) | |||
| Code Churn | |||||
| Lines Added | 78899 | 82336 (+4.2%) | 77190 | 5146 | 21558 |
| Lines Removed | 62325 | 47014 (-67.8%) | 45320 | 1694 | 16705 |
| Engagement | |||||
| Individuals | 68 | 85 (+20.9%) | 83 | 10 | 79 |
| Employers [ 8 ] | 25 | 29 (+16.7%) | 28 | 6 | 25 |
4.9 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
|
|---|---|---|---|
| Adrian Pop | 291 | 2 | 1 |
| Al Stone | 20 | 2 | 1 |
| Alistair Francis | 7 | 7 | 5 |
| Andre Przywara | 1809 | 26 | 11 |
| Andrew Cooper | 8219 | 7907 | 258 |
| Andrii Anisov | 1 | 0 | 1 |
| Andy Lutomirski | 7 | 5 | 1 |
| Andy Shevchenko | 39 | 0 | 1 |
| Anshul Makkar | 14 | 2 | 2 |
| Anthony PERARD | 17 | 2 | 4 |
| Armando Vega | 773 | 707 | 2 |
| Artem Mygaiev | 2 | 2 | 2 |
| Bhavesh Davda | 1 | 3 | 1 |
| Bhupinder Thakur | 66 | 16 | 2 |
| Boris Ostrovsky | 238 | 114 | 14 |
| Cedric Bosdonnat | 2094 | 1574 | 49 |
| Chao Gao | 167 | 80 | 9 |
| Charles Arnold | 1 | 1 | 1 |
| Cristian-Bogdan Sirb | 4 | 1 | 1 |
| Daniel Kiper | 1634 | 579 | 14 |
| Dario Faggioli | 1847 | 631 | 34 |
| David Woodhouse | 17 | 9 | 1 |
| Doug Goldstein | 14 | 40 | 4 |
| Edgar E. Iglesias | 5 | 41 | 5 |
| Elena Ufimtseva | 294 | 59 | 3 |
| Eric DeVolder | 85 | 15 | 7 |
| Fatih Acar | 21 | 13 | 2 |
| Feng Wu | 194 | 143 | 6 |
| George Dunlap | 170 | 73 | 9 |
| Haozhong Zhang | 464 | 345 | 24 |
| He Chen | 36 | 9 | 3 |
| Ian Jackson | 864 | 296 | 29 |
| Igor Druzhinin | 9 | 5 | 1 |
| Jan Beulich | 11008 | 4555 | 235 |
| Jennifer Herbert | 173 | 79 | 3 |
| Joao Martins | 10 | 3 | 1 |
| Jonathan Davies | 185 | 33 | 10 |
| Joshua Otto | 1 | 1 | 1 |
| Juergen Gross | 9785 | 8375 | 81 |
| Julien Grall | 666 | 407 | 47 |
| Jun Sun | 0 | 2 | 1 |
| keios | 5 | 5 | 1 |
| Kevin Tian | 0 | 1 | 1 |
| Konrad Rzeszutek Wilk | 188 | 109 | 8 |
| Luca Miccio | 2 | 1 | 1 |
| Luwei Kang | 47 | 8 | 3 |
| Lv Zheng | 126 | 0 | 1 |
| Marek Marczykowski-Górecki | 169 | 137 | 8 |
| Mohit Gambhir | 9 | 3 | 2 |
| Norbert Manthey | 3 | 3 | 2 |
| Olaf Hering | 1568 | 1 | 8 |
| Oleksandr Andrushchenko | 2098 | 27 | 4 |
| Oleksandr Tyshchenko | 28 | 26 | 3 |
| Paul Durrant | 3952 | 2186 | 31 |
| Paul Lai | 47 | 47 | 1 |
| Peng Fan | 22 | 11 | 1 |
| Peter Große | 3 | 3 | 2 |
| Piotr Luc | 1 | 0 | 1 |
| Praveen Kumar | 12 | 9 | 3 |
| Punit Agrawal | 7 | 5 | 1 |
| Quan Xu | 53 | 14 | 3 |
| Razvan Cojocaru | 451 | 153 | 7 |
| Robin Lee | 6 | 6 | 1 |
| Roger Pau Monne | 2980 | 1928 | 67 |
| Ronald Rojas | 1283 | 4 | 10 |
| Ross Lagerwall | 286 | 214 | 12 |
| Sameer Goel | 1 | 9 | 1 |
| Sander Eikelenboom | 1 | 1 | 1 |
| Seraphime Kirkovski | 2 | 2 | 2 |
| Sergey Dyasli | 377 | 54 | 13 |
| Stefano Stabellini | 2292 | 108 | 26 |
| Suravee Suthikulpanit | 207 | 133 | 3 |
| Tamas K Lengyel | 1278 | 974 | 5 |
| Thomas Sanders | 344 | 54 | 8 |
| Tim Deegan | 3 | 1 | 1 |
| Venu Busireddy | 23 | 2 | 2 |
| Vijaya Kumar K | 69 | 7 | 2 |
| Vitaly Kuznetsov | 41 | 17 | 3 |
| Wei Chen | 570 | 125 | 22 |
| Wei Liu | 16352 | 13506 | 139 |
| Xiong Zhang | 33 | 18 | 1 |
| Yu Zhang | 260 | 58 | 4 |
| Zhang Chen | 690 | 64 | 16 |
| Zhongze Liu | 49 | 10 | 2 |
4.9 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), xtf.git and livepatch-build-tools (tools to builld livepatch payloads).
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
|
|---|---|---|---|
| Andrew Cooper | 2425 | 1131 | 50 |
| Géza Gémes | 427 | 29 | 16 |
| Ian Jackson | 1952 | 470 | 150 |
| Jan Beulich | 120 | 15 | 4 |
| Mohit Gambhir | 12 | 0 | 1 |
| Paul Durrant | 2 | 0 | 1 |
| Ross Lagerwall | 82 | 1 | 2 |
| Simon Waterman | 1 | 28 | 1 |
| Stefano Stabellini | 84 | 15 | 4 |
| Wei Liu | 41 | 5 | 4 |
Code Contributions to Xen Related Drivers and Devices in Linux, NetBSD, FreeBSD [ 4 ]
Breakdown by Individual
|
Note that names from e-mail addresses from the FreeBSD and NetBSD communities have not resolved properly |
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
|
|---|---|---|---|
| Andreas Kinzler | 14 | 3 | 1 |
| Andrii Anisov | 34 | 0 | 1 |
| Ankur Arora | 27 | 9 | 2 |
| Anoob Soman | 1 | 1 | 1 |
| Anthony Xu | 22 | 82 | 3 |
| asomers | 31 | 35 | 2 |
| avg | 2 | 2 | 2 |
| Bart Van Assche | 1 | 1 | 1 |
| Ben Chalmers | 1 | 0 | 1 |
| Bhumika Goyal | 3 | 3 | 1 |
| Boris Ostrovsky | 287 | 39 | 7 |
| bouyer | 235 | 102 | 5 |
| cem | 3 | 3 | 1 |
| cherry | 43 | 10 | 2 |
| Christoph Hellwig | 27 | 13 | 3 |
| chs | 4 | 15 | 1 |
| cognet | 1 | 1 | 1 |
| Colin Ian King | 3 | 8 | 2 |
| cperciva | 11 | 0 | 2 |
| Dan Streetman | 7 | 16 | 1 |
| Daniel P. Berrange | 22 | 3 | 3 |
| Dave Jiang | 2 | 2 | 1 |
| David S. Miller | 0 | 0 | 7 |
| David Vrabel | 2 | 0 | 1 |
| dim | 2 | 2 | 1 |
| Dmitry Torokhov | 0 | 0 | 1 |
| Eduardo Habkost | 11 | 9 | 3 |
| Elena Reshetova | 6 | 5 | 1 |
| Eric Biggers | 3 | 3 | 2 |
| Eric Blake | 14 | 11 | 3 |
| Eric Dumazet | 3 | 3 | 1 |
| Geert Uytterhoeven | 2 | 2 | 1 |
| Geliang Tang | 3 | 3 | 2 |
| glebius | 1 | 2 | 2 |
| Greg Kurz | 1 | 5 | 1 |
| Gustavo A. R. Silva | 5 | 3 | 1 |
| Hu Ziji | 1495 | 6 | 5 |
| Igor Druzhinin | 45 | 22 | 3 |
| imp | 1 | 0 | 1 |
| Ingo Molnar | 4 | 1 | 6 |
| Jan Beulich | 18 | 10 | 4 |
| Jan Kara | 1 | 1 | 1 |
| Jens Axboe | 0 | 0 | 4 |
| Jiandi An | 5 | 3 | 1 |
| Jisheng Zhang | 2 | 19 | 1 |
| Joe Perches | 14 | 33 | 2 |
| Juergen Gross | 947 | 736 | 14 |
| Julia Lawall | 0 | 2 | 1 |
| Julien Grall | 23 | 0 | 2 |
| kamil | 20 | 26 | 3 |
| kevlo | 0 | 4 | 1 |
| Konrad Rzeszutek Wilk | 6 | 2 | 2 |
| kre | 2 | 3 | 1 |
| Linus Torvalds | 0 | 0 | 35 |
| Marc Olson | 3 | 0 | 1 |
| Marc Zyngier | 431 | 0 | 1 |
| Marc-Andre Lureau | 5 | 5 | 2 |
| Mart van Santen | 8 | 8 | 1 |
| Masahiro Yamada | 1 | 1 | 1 |
| Masanari Iida | 0 | 1 | 1 |
| maxv | 209 | 336 | 13 |
| Michal Hocko | 1 | 13 | 1 |
| mlelstv | 5 | 5 | 1 |
| msaitoh | 3 | 3 | 1 |
| nonaka | 29 | 17 | 2 |
| Oleksandr Andrushchenko | 2078 | 27 | 4 |
| Owen Smith | 3268 | 3932 | 10 |
| ozaki-r | 4 | 12 | 1 |
| Pan Bian | 7 | 4 | 2 |
| Paolo Bonzini | 3 | 0 | 1 |
| Parav Pandit | 4 | 4 | 1 |
| Paul Durrant | 10490 | 10816 | 89 |
| Peter Maydell | 0 | 0 | 2 |
| Philippe Reynes | 65 | 58 | 1 |
| Ross Lagerwall | 13 | 22 | 2 |
| royger | 183 | 107 | 10 |
| Shyam Saini | 1 | 2 | 1 |
| skrll | 3 | 4 | 1 |
| Stefano Stabellini | 1271 | 31 | 18 |
| Stephen Hemminger | 6 | 10 | 1 |
| Thomas Gleixner | 1 | 2 | 2 |
| Vineeth Remanan Pillai | 12 | 4 | 2 |
| Vitaly Kuznetsov | 36 | 13 | 4 |
| Wei Yongjun | 1 | 4 | 1 |
4.9 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
|
|---|---|
| 119 others (less than 10 review comments each) | 345 |
| Alistair Francis | 14 |
| Andre Przywara | 71 |
| Andrew Cooper | 792 |
| Andy Lutomirski | 11 |
| Anthony Perard | 13 |
| Bhupinder Thakur | 22 |
| Boris Ostrovsky | 286 |
| Cedric Bosdonnat | 11 |
| Chao Gao | 41 |
| Dan Streetman | 10 |
| Daniel De Graaf | 16 |
| Daniel Kiper | 100 |
| Dario Faggioli | 69 |
| Doug Goldstein | 82 |
| Elena Reshetova | 13 |
| Fu Wei | 10 |
| George Dunlap | 144 |
| Géza Gémes | 10 |
| Greg Kurz | 24 |
| Grek KH | 17 |
| Haozhong Zhang | 46 |
| Ian Jackson | 225 |
| Jacob Shin | 13 |
| Jan Beulich | 1634 |
| Juergen Gross | 222 |
| Julien Grall | 534 |
| Kevin Tian | 133 |
| Konrad Wilk | 179 |
| Luis R. Rodriguez | 74 |
| Luwei Kang | 11 |
| Olaf Hering | 14 |
| Oleksandr Andrushchenko | 64 |
| Oleksandr Grytsov | 11 |
| Oleksandr Tyshchenko | 24 |
| Paul Durrant | 172 |
| Peter Zijlstra | 14 |
| Praveen Kumar | 19 |
| Quan Xu | 24 |
| Razvan Cojocaru | 66 |
| Roger Pau Monné | 167 |
| Ronald Rojas | 21 |
| Ross Lagerwall | 11 |
| Sergey Dyasli | 17 |
| Shanker Donthineni | 11 |
| Stefano Stabellini | 628 |
| Suravee Suthikulpanit | 26 |
| Tamas Lengyel | 60 |
| Thomas Garnier | 28 |
| Tim Deegan | 68 |
| Vijay Kilari | 10 |
| Waiman Long | 13 |
| Wei Liu | 532 |
| Yi Y Sun | 119 |
| Yu Zhang | 51 |
| Zhang Chen | 18 |
| Zhongze Liu | 14 |
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 4.9.0-rc9. 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. Note that in [1] that clean-up did not happen
