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From:   Roman Gushchin <guro@fb.com>
To:     Naresh Kamboju <naresh.kamboju@linaro.org>
CC:     Roman Gushchin <guroan@gmail.com>, Tejun Heo <tj@kernel.org>,
        "Oleg Nesterov" <oleg@redhat.com>,
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Subject: Re: [PATCH v10 6/9] kselftests: cgroup: add freezer controller
 self-tests
Thread-Topic: [PATCH v10 6/9] kselftests: cgroup: add freezer controller
 self-tests
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Date:   Thu, 18 Jul 2019 18:19:10 +0000
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On Wed, Jul 17, 2019 at 02:26:49PM +0530, Naresh Kamboju wrote:
> Hi Roman,
>=20
> > 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.
>=20
> 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.

Oh, it wasn't nearly as bad when I ran it. I'll take a look.

>=20
> >
> > Does it create any difficulties? If so, I'll send a diff to ignore
> > the result of this test for now.
>=20
> No difficulties. I will mark this test case as known failure.

Sure.

Thanks!