Xen Project 4.7 Acknowledgements

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 4.6 with Xen 4.7. 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 4.7 Hypervisor Total.

Attribute	4.6 Hypervisor Total [ 1 ]	4.7 Hypervisor Total [ 2 ]	4.7 Hypervisor Core[ 3 ]	4.7 Hypervisor Other [ 4 ]	Drivers and Devices (other projects)[ 5 ]
Release Cycle	264 days 8.7 months	251 days 8.2 months
Changes/month	259	230[ 7 ]
Changesets	2247	1887	1609	278	1494
Series (=Features)	1174	1025
Review Comments	14623	11628
Comments / Series	12.5	11.3
Lines Added	124035	106606	93013	13593	82820
Lines Removed	90299	37160	34651	2509	40946
Individuals	96	102	99	12	75
Employers	30	36	35	7	48

The following breakdown shows how the number of changesets per categories listed above have evolved between the 4.6 and 4.7 release cycles

4.7 Hypervisor Only Code Contributions ^{[ 3 ]}

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
Alex Xu	15	15	1
Andrew Cooper	5844	3325	161
Anthony PERARD	332	21	7
Aravind Gopalakrishnan	0	2	1
Ashwin Chaugule	42	12	1
Bob Liu	96	0	2
Bob Moore	130	13	5
Boris Ostrovsky	460	276	20
Brendan Gregg	117	18	2
Brijesh Singh	13	1	1
Changlong Xie	126	72	3
Chao Peng	107	66	7
Chester Lin	11	7	2
Chong Li	1062	105	6
Chris Brand	32	22	3
Chris Patterson	24	35	3
Chunyan Liu	2479	50	12
Corneliu ZUZU	591	354	8
Daniel De Graaf	21	16	2
Daniel Kiper	253	194	10
Dario Faggioli	1359	625	62
Dasaratharaman Chandramouli	21	0	1
David Vrabel	366	159	14
Dirk Behme	16	4	3
Doug Goldstein	26634	657	91
Edgar E. Iglesias	67	0	4
Elena Ufimtseva	11	2	1
Euan Harris	1	1	1
Feng Wu	1207	94	17
Fu Wei	96	35	3
George Dunlap	564	131	22
Graeme Gregory	17	4	2
Hanjun Guo	46	4	4
Haozhong Zhang	486	323	22
Harmandeep Kaur	263	254	12
He Chen	416	72	4
Huaitong Han	207	22	7
Ian Campbell	8046	6227	101
Ian Jackson	496	354	59
Jan Beulich	5223	4181	237
Jennifer Herbert	488	425	3
Jiandi An	1	1	1
Jim Fehlig	31	16	5
Joao Martins	8	0	1
Joe Perches	11	11	1
Jonathan Creekmore	135	39	8
Jonathan Davies	264	144	9
Joshua Otto	1	1	1
Juergen Gross	2445	1613	78
Julien Grall	2220	1282	80
Justin Weaver	102	29	1
Kai Huang	52	10	3
Kevin Tian	0	1	1
Konrad Rzeszutek Wilk	6669	2534	55
Kouya Shimura	9	5	1
Kyle J. Temkin	5	0	1
Len Brown	156	25	4
Liang Li	7	0	1
Malcolm Crossley	331	76	6
Mike Belopuhov	58	1	1
Mike Latimer	57	32	1
Mike Meyer	1	0	1
Naresh Bhat	2	1	1
Olaf Hering	92	11	9
Oleksandr Tyshchenko	37	28	2
Parth Dixit	376	18	7
Paul Durrant	3005	1838	31
Paul Lai	29	0	1
Peng Fan	3	2	2
Quan Xu	125	92	5
Razvan Cojocaru	231	228	11
Riku Voipio	2	2	1
Roger Pau Monné	3732	2341	99
Ross Lagerwall	2318	121	16
Ross Philipson	1	1	1
Sander Eikelenboom	4	1	2
Shanker Donthineni	2	2	1
Shannon Zhao	2233	224	50
Shuai Ruan	638	178	11
Simon Rowe	2	2	1
Stefano Stabellini	687	381	17
Suravee Suthikulpanit	0	4	1
Tamas K Lengyel	202	237	7
Tianyang Chen	333	96	1
Tiejun Chen	237	17	5
Tim Deegan	55	26	1
Tomasz Nowicki	123	19	3
Uma Sharma	5	5	1
Vikram Sethi	3	0	1
Vitaly Kuznetsov	564	96	15
Wei Chen	20	12	5
Wei Liu	1163	1873	72
Wei Wang	48	34	3
Wen Congyang	6370	1980	45
Yang Hongyang	1	1	1
Yang Zhang	1	1	1
Yu Zhang	15	13	2
Zhigang Wang	6	3	2
Zoltan Kiss	0	765	1

4.7 Hypervisor Related Code Contributions ^{[ 4 ]}

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 icon besides the column header, to sort by a specific column.

Name	Lines Added	Lines Removed	Changesets
Dongli Zhang	4	4	1
Doug Goldstein	13	0	3
George Dunlap	94	140	4
Ian Campbell	1522	311	95
Ian Jackson	2607	445	117
Juergen Gross	21	79	1
Konrad Rzeszutek Wilk	59	58	1
Robert Ho	303	8	8
Ross Lagerwall	8583	1308	27
Samuel Thibault	18	21	3
Stefano Stabellini	327	120	9
Wei Liu	42	15	9

Code Contributions to Xen Related Drivers and Devices in Linux, NetBSD, FreeBSD ^{[ 5 ]}

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
Alan Somers	16	32	4
Alberto Garcia	100	40	12
Alexander Motin	120	20	4
Amitoj Kaur Chawla	20	20	4
Arnd Bergmann	8	4	8
Bob Liu	4664	3372	60
Boris Ostrovsky	112	28	12
Borislav Petkov	4	4	4
Cao jin	656	612	32
Christoph Hellwig	156	256	16
Christos Zoulas	172	112	16
Colin Percival	24	4	8
Conrad Meyer	4	4	4
Dan Carpenter	44	24	12
Dave Buches	8	10	2
David S. Miller	0	0	28
David Vrabel	2156	728	68
Doug Goldstein	12	4	4
Eduardo Habkost	32	4	8
Edward Tomasz Napierała	0	16	4
Eitan Adler	4	4	4
Eric Blake	16	24	4
Florian Westphal	4	4	4
Gleb Smirnoff	12	12	4
Greg Kroah-Hartman	0	0	4
Ian Campbell	1320	1756	52
Ian Lepore	24	12	4
Ingo Molnar	0	4	16
Insu Yun	64	8	12
Ivan Vecera	0	8	4
Jan Beulich	360	420	28
Jens Axboe	12	8	16
Jiri Kosina	4	0	4
Joe Jin	28	28	4
John Baldwin	152	16	16
John Nemeth	192	64	12
Juergen Gross	4968	336	20
Julia Lawall	24	24	16
Julien Grall	5276	2288	104
Justin Hibbits	4	4	4
Kevin Wolf	16	4	4
Konrad Rzeszutek Wilk	1124	588	64
Lan Tianyu	88	8	4
Laurent Vivier	12	12	4
Linus Torvalds	0	0	104
Malcolm Crossley	12	48	4
Manuel Bouyer	520	224	16
Marcelo Araujo	0	8	4
Mark Syms	2	2	2
Markus Armbruster	220	152	20
Max Reitz	16	8	8
Max V. Kostikov	12	12	4
Michael S. Tsirkin	60	56	16
Michael van Els	20	12	8
Ngie Cooper	0	44	4
Nicholas Bellinger	468	424	8
Nick Hudson	8	4	4
Owen Smith	3668	4216	62
Paolo Bonzini	44	72	16
Paul Durrant	38276	15180	268
Paul Gortmaker	116	448	20
Pedro F. Giffuni	80	84	8
Peng Fan	4	4	4
Peter Maydell	88	228	28
Peter Zijlstra	12	8	4
Rafał Wojdyła	8870	1562	12
Roger Pau Monné	6928	6708	192
Ross Lagerwall	160	36	16
Ryota Ozak	48	48	8
Sepherosa Ziehau	12	32	8
Simon J. Gerraty	4	4	4
Stefan Weil	4	4	4
Stefano Stabellini	1040	344	64
Toshi Kani	4	4	4
Veronia Bahaa	4	0	4
Vitaly Kuznetsov	104	40	8
Wei Liu	4	4	4

4.7 Hypervisor Reviewers ^{[ 6 ]}

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
Andrew Cooper	914
Andrey Borzenkov	14
Andy Lutomirski	55
Anthony Perard	49
Arnd Bergmann	23
Ben Sanda	10
Bob Lui	24
Boris Ostrovsky	266
Borislav Petkov	58
Chunyan Liu	46
Corneliu Zuzu	76
Daniel De Graaf	52
Daniel Kiper	69
Dario Faggioli	300
David Vrabel	173
Doug Goldstein	372
Feng Wu	90
Fu Wei	32
George Dunlap	400
Gerd Hoffmann	14
Haozhong Zhang	121
Huaitong Han	15
Ian Campbell	830
Ian Jackson	494
Ingo Molnar	14
Jan Beulich	1,785
Jim Fehlig	68
Joao M Martins	56
Jonathan Creekmore	33
Juergen Gross	321
Julien Grall	371
Kevin Tian	193
Konrad Wilk	795
Liang Z Li	13
Luis R. Rodriguez	88
Malcolm Crossley	23
Mark Rutland	26
Martin Pohlack	13
Meng Xu	67
Michael S. Tsirkin	33
Olaf Hering	70
Paul Durrant	204
Peter Zijlstra	28
Quan Xu	227
Razvan Cojocaru	105
Roger Pau Monne	184
Ross Lagerwall	59
Samuel Thibault	34
Shanker Donthineni	11
Shannon Zhao	145
Shuai Ruan	16
Stefano Stabellini	502
Tamas K Lengyel	164
Tianyang Chen	22
Tim Deegan	15
Toshi Kani	17
Vladimir Serbinenko	13
Wei Liu	728
Wei W Wang	11
Wen Congyang	72
Xie Changlong	37
Yu C Zhang	67
Others (less than 10 review comments each)	501

Footnotes

^{[ 1 ]} Includes the following repos: xen (including mini-os), osstest, raisin was introduced in Xen 4.6
^{[ 2 ]} Includes the following repos: xen, mini-os, osstest, raisin, livepatch-build-tools
^{[ 3 ]} Includes the following repos: xen
^{[ 4 ]} Includes the following repos: mini-os, osstest, raisin, livepatch-build-tools
^{[ 5 ]} 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
^{[ 6 ]} This data was extracted from the Xen Project Code Review Dashboard
^{[ 7 ]} Note that the 4.7 release cycle went over the winter holidays, while the 4.6 cycle didn't span any major holidays