Contributors

The following companies contribute to Btrfs code, not counting the treewide and other subsystem changes. Infrequent contributions are not reflected in this list, please have a look to the git history for complete list.

Sorted alphabetically:

• Facebook
• Fujitsu
• SUSE
• Oracle

The following contributed in the past (sorted alphabetically):

• Fusion-IO
• Intel
• Linux Foundation
• Red Hat
• STRATO AG

Statistics for 5.x series

Version	Contributors	SLOC	Raw lines	Patches	Diffstat
5.0	15	98298	134159	144	+3173 -2297
5.1	18	98992	135308	116	+2208 -1059
5.2	22	99888	136521	255	+3524 -2311
5.3	20	100254	137224	124	+4106 -3400
5.4	18	100660	137889	166	+10752 -10087
5.5	17	100638	138212	168	+3055 -2729
5.6	18	101482	139742	114	+3370 -1840
5.7	22	101661	140694	221	+4484 -3532

Legend:

• Files: fs/btrfs/*.[ch], fs/btrfs/tests/*.[ch], include/uapi/linux/btrfs.h, include/uapi/linux/btrfs_tree.h, include/linux/btrfs.h, include/trace/events/btrfs.h
• Version: mainline version
• Contributors: number of people that sent patches that modified Files, direct btrfs development or originating from other tree-wide changes
• SLOC: lines of code, http://dwheeler.com/sloccount/ (generated by version 2.26)
• Raw lines: counted by wc -l over Files
• Patches: number of patches from Contributors, merge commits excluded
• Diffstat: lines added and deleted in Files

Statistics for 4.x series

Version	Contributors	SLOC	Raw lines	Patches	Diffstat
4.0	22	85849	115716	97	+1622 -937
4.1	25	87596	118253	120	+2415 -1062
4.2	19	87935	118790	119	+2392 -1855
4.3	23	88384	119576	74	+1516 -730
4.4	26	89543	121456	138	+3184 -1304
4.5	26	91708	124363	127	+4370 -1462
4.6	29	92134	125045	100	+1890 -1208
4.7	33	92922	126264	161	+3721 -2502
4.8	22	93769	127392	114	+2732 -1604
4.9	25	94237	128040	64	+1959 -1311
4.10	24	94303	128156	105	+4874 -4758
4.11	24	94365	128340	210	+2084 -1900
4.12	21	94931	129230	85	+1803 -913
4.13	29	93892	127970	135	+2017 -1607
4.14	28	94296	124346	132	+2114 -1520
4.15	30	97091	132221	128	+3761 -1795
4.16	25	97637	133305	188	+2562 -1481
4.17	21	98027	133003	194	+2723 -3024
4.18	26	98387	133667	200	+3643 -2979
4.19	25	97547	132655	193	+2058 -3070
4.20	22	97830	133283	128	+1560 -932

Statistics for 3.x series

Version	Contributors	SLOC	Raw lines	Patches	Diffstat
3.0	25	48665	65192	126	+7508 -5175
3.1	24	48647	65248	106	+1762 -1586
3.2	30	51574	69552	184	+6344 -2040
3.3	27	56216	75485	129	+7151 -1218
3.4	25	57865	77671	118	+4597 -2411
3.5	21	59683	79983	108	+3570 -1258
3.6	25	65894	88123	104	+9145 -1005
3.7	30	67348	90171	151	+3802 -1754
3.8	25	70289	93916	161	+5599 -1854
3.9	29	73414	98602	160	+6430 -1242
3.10	24	74449	99980	133	+3529 -2151
3.11	21	74875	100657	100	+2538 -1857
3.12	32	76265	102497	158	+4373 -2533
3.13	24	77532	104108	123	+2741 -1123
3.14	28	79879	107069	171	+5290 -2329
3.15	27	80308	107544	152	+2389 -1914
3.16	29	82292	110331	137	+4361 -1574
3.17	19	82625	110841	44	+1060 -550
3.18	25	83910	112906	149	+3696 -1631
3.19	18	85420	115031	82	+2802 -677

Statistics for 2.6.x series

Version	Contributors	SLOC	Raw lines	Patches	Diffstat
2.6.30	22	33838	45377	70	+4403 -2632
2.6.31	19	38825	51693	68	+9207 -2862
2.6.32	15	40211	53515	95	+4291 -2469
2.6.33	17	40408	53806	43	+1332 -1041
2.6.34	18	41100	54715	54	+1374 -465
2.6.35	14	43014	57082	50	+5230 -2863
2.6.36	4	43016	57088	6	+39 -33
2.6.37	17	44781	59491	83	+3104 -701
2.6.38	23	46573	61980	90	+3472 -983
2.6.39	28	47206	62859	102	+2115 -1236