Regression testing done with 3 approaches:
1) synthetic reproducer in kernel.org BZ#202833 [1] 2) stress-ng --class filesystem,io 3) xfstests (aka fstests)
No regressions observed in Bionic/Focal/Groovy between original/patched kernels, in s390x native VMs in canonistack-bos01.
Regression testing done with 3 approaches:
1) synthetic reproducer in kernel.org BZ#202833 [1]
2) stress-ng --class filesystem,io
3) xfstests (aka fstests)
No regressions observed in Bionic/Focal/Groovy between original/patched kernels, in s390x native VMs in canonistack-bos01.