DLPX-94968 [Backport of DLPX-94858] Delphix Engine NFS Server stops responding under heavy I/O #68#363
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Problem
The logic we use to build the kernel assumes the kernel version can be found in the "release" field, output by "debian/rules printenv". This changed in the new 6.14 kernels, and now that information is found in the "DEB_VERSION_UPSTREAM" field.
See also: https://github.com/delphix/linux-kernel/oracle/commit/f28fb04c41f29e416570431dd6f9b726356664ed
The solution taken in this PR is to have our build logic first check the "release" field, but fall back to "DEB_VERSION_UPSTREAM" if the release cannot be found. This way, it should work for kernels prior to 6.14, as well as 6.14+ kernels.Solution