1 XFS Maintainer Entry Profile
2 ============================
6 XFS is a well known high-performance filesystem in the Linux kernel.
7 The aim of this project is to provide and maintain a robust and
10 Patches are generally merged to the for-next branch of the appropriate
12 After a testing period, the for-next branch is merged to the master
15 Kernel code are merged to the xfs-linux tree[0].
16 Userspace code are merged to the xfsprogs tree[1].
17 Test cases are merged to the xfstests tree[2].
18 Ondisk format documentation are merged to the xfs-documentation tree[3].
20 All patchsets involving XFS *must* be cc'd in their entirety to the mailing
21 list linux-xfs@vger.kernel.org.
25 There are eight key roles in the XFS project.
26 A person can take on multiple roles, and a role can be filled by
28 Anyone taking on a role is advised to check in with themselves and
29 others on a regular basis about burnout.
31 - **Outside Contributor**: Anyone who sends a patch but is not involved
32 in the XFS project on a regular basis.
33 These folks are usually people who work on other filesystems or
34 elsewhere in the kernel community.
36 - **Developer**: Someone who is familiar with the XFS codebase enough to
37 write new code, documentation, and tests.
39 Developers can often be found in the IRC channel mentioned by the ``C:``
40 entry in the kernel MAINTAINERS file.
42 - **Senior Developer**: A developer who is very familiar with at least
43 some part of the XFS codebase and/or other subsystems in the kernel.
44 These people collectively decide the long term goals of the project
45 and nudge the community in that direction.
46 They should help prioritize development and review work for each release
49 Senior developers tend to be more active participants in the IRC channel.
51 - **Reviewer**: Someone (most likely also a developer) who reads code
52 submissions to decide:
54 0. Is the idea behind the contribution sound?
55 1. Does the idea fit the goals of the project?
56 2. Is the contribution designed correctly?
57 3. Is the contribution polished?
58 4. Can the contribution be tested effectively?
60 Reviewers should identify themselves with an ``R:`` entry in the kernel
61 and fstests MAINTAINERS files.
63 - **Testing Lead**: This person is responsible for setting the test
64 coverage goals of the project, negotiating with developers to decide
65 on new tests for new features, and making sure that developers and
66 release managers execute on the testing.
68 The testing lead should identify themselves with an ``M:`` entry in
69 the XFS section of the fstests MAINTAINERS file.
71 - **Bug Triager**: Someone who examines incoming bug reports in just
72 enough detail to identify the person to whom the report should be
75 The bug triagers should identify themselves with a ``B:`` entry in
76 the kernel MAINTAINERS file.
78 - **Release Manager**: This person merges reviewed patchsets into an
79 integration branch, tests the result locally, pushes the branch to a
80 public git repository, and sends pull requests further upstream.
81 The release manager is not expected to work on new feature patchsets.
82 If a developer and a reviewer fail to reach a resolution on some point,
83 the release manager must have the ability to intervene to try to drive a
86 The release manager should identify themselves with an ``M:`` entry in
87 the kernel MAINTAINERS file.
89 - **Community Manager**: This person calls and moderates meetings of as many
90 XFS participants as they can get when mailing list discussions prove
91 insufficient for collective decisionmaking.
92 They may also serve as liaison between managers of the organizations
93 sponsoring work on any part of XFS.
95 - **LTS Maintainer**: Someone who backports and tests bug fixes from
96 uptream to the LTS kernels.
97 There tend to be six separate LTS trees at any given time.
99 The maintainer for a given LTS release should identify themselves with an
100 ``M:`` entry in the MAINTAINERS file for that LTS tree.
101 Unmaintained LTS kernels should be marked with status ``S: Orphan`` in that
104 Submission Checklist Addendum
105 -----------------------------
106 Please follow these additional rules when submitting to XFS:
108 - Patches affecting only the filesystem itself should be based against
109 the latest -rc or the for-next branch.
110 These patches will be merged back to the for-next branch.
112 - Authors of patches touching other subsystems need to coordinate with
113 the maintainers of XFS and the relevant subsystems to decide how to
114 proceed with a merge.
116 - Any patchset changing XFS should be cc'd in its entirety to linux-xfs.
117 Do not send partial patchsets; that makes analysis of the broader
118 context of the changes unnecessarily difficult.
120 - Anyone making kernel changes that have corresponding changes to the
121 userspace utilities should send the userspace changes as separate
122 patchsets immediately after the kernel patchsets.
124 - Authors of bug fix patches are expected to use fstests[2] to perform
125 an A/B test of the patch to determine that there are no regressions.
126 When possible, a new regression test case should be written for
129 - Authors of new feature patchsets must ensure that fstests will have
130 appropriate functional and input corner-case test cases for the new
133 - When implementing a new feature, it is strongly suggested that the
134 developers write a design document to answer the following questions:
136 * **What** problem is this trying to solve?
138 * **Who** will benefit from this solution, and **where** will they
141 * **How** will this new feature work? This should touch on major data
142 structures and algorithms supporting the solution at a higher level
145 * **What** userspace interfaces are necessary to build off of the new
148 * **How** will this work be tested to ensure that it solves the
149 problems laid out in the design document without causing new
152 The design document should be committed in the kernel documentation
154 It may be omitted if the feature is already well known to the
157 - Patchsets for the new tests should be submitted as separate patchsets
158 immediately after the kernel and userspace code patchsets.
160 - Changes to the on-disk format of XFS must be described in the ondisk
161 format document[3] and submitted as a patchset after the fstests
164 - Patchsets implementing bug fixes and further code cleanups should put
165 the bug fixes at the beginning of the series to ease backporting.
167 Key Release Cycle Dates
168 -----------------------
169 Bug fixes may be sent at any time, though the release manager may decide to
170 defer a patch when the next merge window is close.
172 Code submissions targeting the next merge window should be sent between
174 This gives the community time to review the changes, to suggest other changes,
175 and for the author to retest those changes.
177 Code submissions also requiring changes to fs/iomap and targeting the
178 next merge window should be sent between -rc1 and -rc4.
179 This allows the broader kernel community adequate time to test the
180 infrastructure changes.
184 In general, please wait at least one week before pinging for feedback.
185 To find reviewers, either consult the MAINTAINERS file, or ask
186 developers that have Reviewed-by tags for XFS changes to take a look and
191 | [0] https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/
192 | [1] https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git/
193 | [2] https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/
194 | [3] https://git.kernel.org/pub/scm/fs/xfs/xfs-documentation.git/