Xen 4.3 Acknowledgements

Note that these results are preliminary and will somewhat change when Xen 4.3 is released.

Overview

Xen 4.3 (compared to Xen 4.2) was made up of

• 1232 commits (excluding merges) or
• 122800 lines of code changes.

Changes were made by

• 87 individuals (after removing knowledge of e-mail aliases)
• from 49 distinct organisations (after clean-up, counting each unaffiliated individual as 1).

Note that the the development cycle has shortened from 18 months (from Xen 4.1 to Xen 4.2) to 9 months (from Xen 4.2 to Xen 4.3).

Breakdown by Individual

Name	Commits	Changes	Notes
Andre Przywara	8	55
Andrei Lifchits	1	1
Andres Lagar-Cavilla	3	27
Andrew Cooper	21	340
Anthony PERARD	21	948
Aravindh Puthiyaparambil	1	8
Bamvor Jian Zhang	1	2
Bastian Blank	2	252
Ben Guthro	4	163
Bob Moore	3	57
Boris Ostrovsky	15	456
Charles Arnold	2	21
Choonho Son	1	1
Christoph Egger	22	1171
Chunyan Liu	1	21
Dan Magenheimer	6	284
Daniel De Graaf	67	5443
Daniel Kiper	13	70
Dario Faggioli	22	1288
Dave McCracken	1	101
David Scott	9	345
David Vrabel	9	616
Dietmar Hahn	5	214
Dongxiao Xu	32	838
Dr. Greg Wettstein	2	16
Eric Shelton	2	11
Fabio Fantoni	5	99
Frediano Ziglio	12	1045
George Dunlap	21	408
Huang Ying	3	83
Ian Campbell	216	62507	This includes teh removal of the Itanium port which made up nearly 47980 lines of code
Ian Jackson	39	799
Ian Murray	1	3
Jacek Konieczny	1	1
Jacob Shin	1	17
Jaeyong Yoo	1	4
Jan Beulich	224	8353
Jason McCarver	1	5
Jim Fehlig	2	40
Jiongxi Li	5	434
Joe Jin	1	1
Juergen Gross	1	14
Julien Grall	51	3631
Keir Fraser	27	600
Konrad Rzeszutek Wilk	30	438
Kouya Shimura	1	1
Lalith Suresh	1	1
Lars Rasmusson	1	2
Len Brown	2	62
Liu Jinsong	13	465
M A Young	2	11
Malcolm Crossley	1	32
Marek Marczykowski	2	103
Matt Wilson	2	301
Matthew Daley	6	14
Matthew Fioravante	29	19322
Miroslav Rezanina	1	1
Olaf Hering	38	386
Paolo Bonzini	1	26
Patrick Welche	2	18
Paul Durrant	2	48
Razvan Cojocaru	2	25
Robbie VanVossen	1	5
Robert Phillips	2	1528
Roger Pau Monne	22	644
Ronny Hegewald	2	4
Ross Philipson	7	830
Samuel Thibault	5	188
Sander Eikelenboom	4	20
Shakeel Butt	1	4
Shriram Rajagopalan	1	19
Stefan Bader	2	15
Stefano Stabellini	79	3331
Steven Maresca	1	4
Suravee Suthikulpanit	3	49
Tim Deegan	34	1814
Tomasz Wroblewski	1	63
Vincent Bernardoff	1	1
Wei Huang	1	2
Wei Liu	13	697
Wei Wang	3	69
Xi Wang	2	3
Xiantao Zhang	11	1042
Xu Zhang	6	191
Xudong Hao	1	50
Yang Zhang	6	176
Zhenzhong Duan	1	2

Breakdown by Domain / Organisations

Employer	Commits	Changes
(Academia, ENS Lyon)	1	21
(Academia, John Hopkins University)	29	36728
(Academia, MIT)	2	3
(Academia, Swedish Institute of Computer Science)	1	2
(Academia, UIC)	6	192
(Academia, University of Cambridge)	2	18
(Unaffiliated Individual)1)	103	3475
Amazon	11	499
AMD	25	1518
Calxeda	6	44
Canonical	2	15
Cisco	1	8
Citrix	508	87131 2)
Fujitsu	7	229
GridCentric	3	27
Intel	76	3446
Invisible Things Lab	2	103
KT	1	1
Linaro	45	3430
Oracle	60	1261
Red Hat	2	27
Samsung	2	6
Suse	268	9898
US National Security Agency	67	7467
Virtual Computer	1	10
Zentific	1	4

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Note that this list also contains individuals with no obvious affiliation to an organisation. These are grouped under :

• ¹⁾ Unaffiliated Individuals (of which there are 23). Note that some of these may be affiliated to an organization. We just may not know.
• ²⁾ This figure contains the removal of the Xen Itanium port (47980 lines of code), which is skewing this figure heavily. Without this removal, the Citrix contribution is only 39151 lines of code

Breakdown by Organisations contributing 1% or more

The following list shows Organizations which contributed either more than 1% in terms of code or changesets. Note that we showed the removal of the toolstack support of the IA64 port (performed by a Ian Campbell, a committer employed by Citrix), whereas in Xen 4.2 the hypervisor portion of the IA64 port was we removed by Jan Beulich (a committer employed by Suse).

This image contains groups of people or organisations:

• Other : a bucket for commercial organizations contributing under 1%
• Individual : a bucket 23 unaffiliated individuals (or whose affiliation is unknown) who contributing under 1%
• Academia : a bucket for Universities contributing under 1%