Hi Roman, > The interaction between ptrace and freezer is complicated > (as ptrace in general),so there are known cases when spurious > cgroup transitions (frozen <-> non frozen <-> frozen ) can happen. When test ran for 8 times it got failed 5 times. I have noticed intermittent failure on x86_64, arm64 hikey device and qemu_arm64. > > Does it create any difficulties? If so, I'll send a diff to ignore > the result of this test for now. No difficulties. I will mark this test case as known failure. > > > This patch implements 9 tests for the freezer controller for > > > cgroup v2: > > ... > > > 6) ptrace test: the test checks that it's possible to attach to > > > a process in a frozen cgroup, get some information and detach, and > > > the cgroup will remain frozen. > > > > selftests cgroup test_freezer failed because of the sys entry path not found. > > Can you, please, elaborate on this? I see this failure output on screen and sharing log here. Please find full test log here, https://lkft.validation.linaro.org/scheduler/job/825346#L673 - Naresh
