Linux compat: Minimum kernel version 3.10 #9566
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12 tasks
behlendorf
added
the
Type: Building
|
Maybe add this to Project 25 "OpenZFS integration", under "Code Refactoring"? |
Increase the minimum supported kernel version from 2.6.32 to 3.10.
This removes support for the following Linux enterprise distributions.
Distribution | Kernel | End of Life
---------------- | ------ | -------------
Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017
SLES 11 | 3.0 | Mar 32, 2019
RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020
The following changes were made as part of removing support.
* Updated `configure` to enforce a minimum kernel version as
specified in the META file (Linux-Minimum: 3.10).
configure: error:
*** Cannot build against kernel version 2.6.32.
*** The minimum supported kernel version is 3.10.
* Removed all `configure` kABI checks and matching C code for
interfaces which solely predate the Linux 3.10 kernel.
* Updated all `configure` kABI checks to fail when an interface is
missing which was in the 3.10 kernel up to the latest 5.1 kernel.
Removed the HAVE_* preprocessor defines for these checks and
updated the code to unconditionally use the verified interface.
* Inverted the detection logic in several kABI checks to match
the new interface as it appears in 3.10 and newer and not the
legacy interface.
* Consolidated the following checks in to individual files. Due
the large number of changes in the checks it made sense to handle
this now. It would be desirable to group other related checks in
the same fashion, but this as left as future work.
- config/kernel-blkdev.m4 - Block device kABI checks
- config/kernel-blk-queue.m4 - Block queue kABI checks
- config/kernel-bio.m4 - Bio interface kABI checks
* Removed the kABI checks for sops->nr_cached_objects() and
sops->free_cached_objects(). These interfaces are currently unused.
Signed-off-by: Brian Behlendorf <[email protected]>
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Rebased on master to resolve merge conflicts from recent changes. Added to the OpenZFS tracking project, while not required for FreeBSD integration it is semi-related work. |
|
Net deletion of 2000+ lines of code, woohoo!!! |
behlendorf
added
Status: Accepted
Codecov Report
@@ Coverage Diff @@
## master #9566 +/- ##
==========================================
- Coverage 79.05% 79.03% -0.03%
==========================================
Files 418 418
Lines 123680 123678 -2
==========================================
- Hits 97777 97743 -34
- Misses 25903 25935 +32
Continue to review full report at Codecov.
|
12 tasks
ahrens
pushed a commit
to ahrens/zfs
that referenced
this pull request
Jul 17, 2020
Increase the minimum supported kernel version from 2.6.32 to 3.10.
This removes support for the following Linux enterprise distributions.
Distribution | Kernel | End of Life
---------------- | ------ | -------------
Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017
SLES 11 | 3.0 | Mar 32, 2019
RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020
The following changes were made as part of removing support.
* Updated `configure` to enforce a minimum kernel version as
specified in the META file (Linux-Minimum: 3.10).
configure: error:
*** Cannot build against kernel version 2.6.32.
*** The minimum supported kernel version is 3.10.
* Removed all `configure` kABI checks and matching C code for
interfaces which solely predate the Linux 3.10 kernel.
* Updated all `configure` kABI checks to fail when an interface is
missing which was in the 3.10 kernel up to the latest 5.1 kernel.
Removed the HAVE_* preprocessor defines for these checks and
updated the code to unconditionally use the verified interface.
* Inverted the detection logic in several kABI checks to match
the new interface as it appears in 3.10 and newer and not the
legacy interface.
* Consolidated the following checks in to individual files. Due
the large number of changes in the checks it made sense to handle
this now. It would be desirable to group other related checks in
the same fashion, but this as left as future work.
- config/kernel-blkdev.m4 - Block device kABI checks
- config/kernel-blk-queue.m4 - Block queue kABI checks
- config/kernel-bio.m4 - Bio interface kABI checks
* Removed the kABI checks for sops->nr_cached_objects() and
sops->free_cached_objects(). These interfaces are currently unused.
Signed-off-by: Brian Behlendorf <[email protected]>
Closes openzfs#9566
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Motivation and Context
Maintain a healthy code base to support on going development by removing unused, or rarely used, compatibility code.
Linux version 3.10 was selected as the new minimum version in order to continue to support CentOS / RHEL 7, Ubuntu 14.04, and SLES 12. These enterprise distributions are still widely deployed and in the case of CentOS / RHEL 7 / SLES will not be EoL for several years.
Description
Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions.
The following changes were made as part of removing support.
Updated
configureto enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10).Removed all
configurekABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel.Updated all
configurekABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface.Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface.
Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work.
Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused.
How Has This Been Tested?
Additional CI testing pending, this PR is expected to fail on certain builders running kernels which are no longer supported. They will be retired after this PR is merged.
Types of changes
Checklist:
Signed-off-by.