Xen Project 4.11 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 4.10 with Xen 4.11. 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 4.11 Hypervisor Total. 
Note: The data below shows a reduction in public code review activity, as well as development velocity. This figure is substantially skewed by a number of large and complex security related code series that were developed in private under security embargoes. In other words, the reduction signifies that we are doing fewer public reviews to satisfy requirements that allow project members to fix issues under security embargoes. In addition, we ported many of these changes - including code that enabled these series - to older releases of Xen to uphold our maintenance and security guarantees.
Attribute 	4.10 Hypervisor Total [ 1 ] 	4.11 Hypervisor Total [ 1 ] 	4.11 Hypervisor Core [ 2 ]	4.11 Hypervisor Other [ 3 ]	Drivers and Devices (other projects) [ 4 ]
Release Cycle 	174 days111 dev window/days [ 6 ] 5.9 months	222 days 139 dev window/days [ 6 ]7.5 months	 	 	
Development Velocity 	Development Velocity 	Development Velocity 	Development Velocity 	Development Velocity 	Development Velocity
Changesets 	1250 	1206 	987 	287 	1493
Changesets (including backports) [ 8 ]	1751 	1971 	 	 	
Series (=Features) [ 5 ] 	525 	406 	 	 	
Average Size of Feature 	2.3 	3.0 	 	 	
Changes / Day 	7.2 	5.4 	 	 	
Changes / Dev Day [ 6 ] 	11.2 	8.7 	 	 	
Features / Day [ 5 ] 	3.0 	3.4 	 	 	
Code Review Statistics 	Code Review Statistics 	Code Review Statistics 	Code Review Statistics 	Code Review Statistics 	Code Review Statistics
Review Comments [ 5 ] 	6527 	7058 	 	 	
Review Comments / Day [ 5 ] 	37.8 	31.8 	 	 	
Review Comments / Dev Day [ 6 ] 	59.2 	50.8 	 	 	
Comments / Series [ 5 ] 	12.5 	17.4 	 	 	
Code Churn 	Code Churn 	Code Churn 	Code Churn 	Code Churn 	Code Churn
Lines Added 	68199 	42862 	42862 	8577 	51439
Lines Removed 	25777 	16030 	16030 	6602 	22632
Engagement 	Engagement 	Engagement 	Engagement 	Engagement 	Engagement
Individuals 	80 	62 	62 	78 	
Employers [ 7 ] 	31 	27 	27 	37 	
== 4.11 Hypervisor Only Code Contributions [ 1 ] ==
=== Breakdown by Individual ===
This table is sortable : please click on the icon besides the column header, to sort by a specific column.
Name	Changesets	Lines Added	Lines Removed
	Alan Robinson		1 		6 		4
	Alexandru Isaila		8 		242 		79
	Amit Singh Tomar		3 		357 		1
	Andre Przywara		68 		4307 		789
	Andrew Cooper		246 		8223 		3683
	Andrii Anisov		1 		4 		2
	Anthony PERARD		6 		107 		53
	Bob Moore		1 		3 		2
	Boris Ostrovsky		5 		115 		54
	Brian Woods		10 		155 		40
	Bruno Alvisio		18 		838 		264
	Daniel Kiper		5 		26 		11
	Dario Faggioli		11 		329 		206
	David E. Box		1 		2 		0
	David Esler		1 		5 		5
	David Wang		1 		4 		2
	Doug Goldstein		16 		556 		1668
	Euan Harris		1 		4 		26
	George Dunlap		12 		164 		69
	Gregory Herrero		1 		12 		4
	Haozhong Zhang		3 		12 		7
	Ian Jackson		181 		2980 		743
	Igor Druzhinin		1 		15 		3
	Jan Beulich		160 		5663 		2407
	Jan H. Schoenherr		1 		2 		2
	Jim Fehlig		1 		4 		1
	Joe Jin		1 		5 		3
	John Thomson		2 		3 		3
	Jon Ludlam		2 		197 		117
	Juergen Gross		28 		1394 		832
	Julien Grall		99 		2549 		1619
	Lars Kurth		3 		572 		13
	Liran Alon		1 		3 		1
	Maran Wilson		1 		62 		1
	Marcello Seri		3 		36 		37
	Marek Marczykowski-Górecki		10 		80 		16
	Michael Young		4 		75 		73
	Michel Lespinasse		14 		544 		372
	Olaf Hering		10 		30 		20
	Oleksandr Andrushchenko		11 		366 		44
	Oleksandr Grytsov		4 		248 		260
	Oleksandr Tyshchenko		1 		1 		1
	Paul Durrant		19 		1421 		737
	Paul Semel		2 		8 		3
	Petre Eftime		1 		1 		1
	Razvan Cojocaru		4 		293 		40
	Roger Pau Monne		121 		7116 		876
	Ross Lagerwall		9 		249 		84
	Sameer Goel		1 		2 		2
	Sergey Dyasli		8 		653 		38
	Simon Gaiser		3 		14 		12
	Stefano Stabellini		11 		258 		58
	Stewart Hildebrand		2 		4 		3
	Tom Lendacky		1 		4 		0
	Uwe Dannowski		1 		3 		2
	Wei Liu		45 		1028 		190
	Wei Yang		1 		1 		1
	Wolfram Strepp		1 		4 		4
	Xen Project Security Team		1 		95 		31
	Yi Sun		16 		1393 		408
	Zhenzhong Duan		1 		0 		3
	Zhongze Liu		1 		15 		0
== 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 	Changesets	Lines Added	Lines Removed
Al Viro 	1 	1 	1
Alistair Francis 	2 	18 	16
Andrew Turner 	1 	1 	1
Andy Shevchenko 	1 	1 	3
Arnd Bergmann 	2 	7 	9
Arvind Yadav 	1 	4 	1
Bart Van Assche 	1 	5 	5
Ben Chalmers 	1 	2 	2
Bhavesh Davda 	1 	8 	9
Bjorn Helgaas 	5 	3 	2
Boris Ostrovsky 	3 	84 	11
Manuel Bouyer 	2 	32 	11
Cherry G. Mathew 	1 	6 	6
Chris Patterson 	1 	6 	1
Christoph Hellwig 	2 	2 	16
Christos Zoulas 	6 	51 	196
Colin Ian King 	2 	2 	2
Dan Carpenter 	6 	12 	10
Daniel Vetter 	1 	1 	7
Dave Airlie 	1 	0 	0
David Gibson 	2 	15 	15
David S. Miller 	7 	0 	0
Eduardo Habkost 	2 	7 	7
Eduardo Otubo 	1 	1 	0
Ed Maste 	1 	4 	4
Frederick Lawler 	1 	9 	10
Greg Kurz 	2 	2 	3
Huang Ying 	1 	4 	0
Ian Jackson 	6 	58 	74
Igor Druzhinin 	3 	34 	23
Jan Beulich 	1 	1 	1
Jason Andryuk 	1 	6 	1
Jaromír Doleček 	9 	457 	179
Jeff Roberson 	3 	6 	6
Jens Axboe 	1 	0 	0
Jia-Ju Bai 	5 	5 	5
Joao Martins 	2 	29 	0
Joe Jin 	1 	1 	1
Joe Perches 	6 	22 	25
Juergen Gross 	2 	225 	3
Kees Cook 	5 	29 	22
Konstantin Belousov	1 	53 	2
Robert Elz 	1 	5 	4
Linus Torvalds 	38 	12 	12
Luc Van Oostenryck 	1 	1 	1
Maarten Lankhorst 	1 	0 	0
Marc-Andre Lureau 	1 	2 	2
== 4.11 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 (excludes replies to own series)
240 others (less than 10 review comments each)	555
Jan Beulich 	1,177
Andrew Cooper 	618
Julien Grall 	554
Roger Pau Monne 	395
Wei Liu 	376
Stefano Stabellini 	354
Juergen Gross 	282
Boris Ostrovsky 	226
Oleksandr Andrushchenko 	215
George Dunlap 	190
Paul Durrant 	142
Andre Przywara 	100
Ian Jackson 	136
Razvan Cojocaru 	68
Kevin Tian 	66
Konrad Wilk 	56
Tamas K Lengyel 	51
Dario Faggioli 	50
Mirela Simonovic 	50
Daniel Kiper 	45
Olaf Hering 	45
Chao Gao 	41
Alexandru Isaila 	39
Anthony Perard 	39
Lars Kurth 	38
Volodymyr Babchuk 	37
Doug Goldstein 	34
Paul Semel 	29
Manish Jagg 	28
Anthony Liguori 	26
Michael Tsirkin 	26
Takashi Iwai 	25
Tim Deegan 	23
Simon Gaiser 	22
Daniel Vetter 	21
Ross Lagerwall 	21
Marek Marczykowski 	19
Daniel Berrange 	18
Sky Liu 	15
Govinda Tatti 	15
Alexey Gerasimenk 	15
Oleksandr Grytsov 	14
Igor Druzhinin 	14
Maran Wilson 	14
Marc Zyngier 	14
Ingo Molnar 	14
Christian Lindig 	13
Brian Woods 	12
Sergey Dyasli 	12
Andrii Anisov 	11
Dmitry Torokhov 	11
Dongwon Kim 	11
Natarajan Janakarajan 	11
homas Garnier 	11
Volodymyr Babchuk 	11
Zhenzhong Duan 	11
Arnd Bergmann 	10
David Woodhouse 	10
Eric Blak 	10
Zhouyang Jia 	10
== 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 ] Only known employers are used. Unknown employers were discounted. 
[ 8 ] Includes backports to stable branches 
Category:Xen
Category:Xen 4.11