[DTrace-devel] [PATCH] Revert "dt_pid: pid grabs should be shortlived"

[Sam James]

Sam James via DTrace-devel <dtrace-devel at oss.oracle.com> writes:

> Nick Alcock via DTrace-devel <dtrace-devel at oss.oracle.com> writes:
>
>> On 22 May 2025, eugene loh verbalised:
>>
>>> From: Eugene Loh <eugene.loh at oracle.com>
>>>
>>> Commit 4aec5c9931eb ("dt_pid: pid grabs should be shortlived") made
>>> grabs short-lived.  No test cases show the utility of this patch.
>>> Meanwhile, the patch causes roughly a dozen tests to fail on OL9
>>> when the test suite is started remotely using ssh, closing ttys.  The
>>
>> I think this is a consequence of another bug (Psystem_daemon() was
>> failing to detect that systemd was running correctly on systemd v2
>
> (Do you mean cgroup v2?)

Nevermind, I see that in the patch you posted.

>
>> systems, and we were falling back to the old approach, which is indeed
>> going to conclude that processes in system groups without controlling
>> terminals or associated TTYs are system daemons).
>>
>> I have a fix for this detection failure under test now and will post it
>> shortly.
>
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