linux-kernel - Re: [PATCH v2 2/2] Add selftests for pidfd polling

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Date:   Tue, 14 May 2019 17:17:08 +0200
From:   Christian Brauner <christian@...uner.io>
To:     "Joel Fernandes (Google)" <joel@...lfernandes.org>
Cc:     linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Arnd Bergmann <arnd@...db.de>,
        Daniel Colascione <dancol@...gle.com>,
        David Howells <dhowells@...hat.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>, Jann Horn <jannh@...gle.com>,
        Jonathan Kowalski <bl0pbl33p@...il.com>,
        Kees Cook <keescook@...omium.org>, kernel-team@...roid.com,
        KJ Tsanaktsidis <ktsanaktsidis@...desk.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kselftest@...r.kernel.org, Michal Hocko <mhocko@...e.com>,
        Nadav Amit <namit@...are.com>, Oleg Nesterov <oleg@...hat.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Serge Hallyn <serge@...lyn.com>, Shuah Khan <shuah@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tim Murray <timmurray@...gle.com>,
        Tycho Andersen <tycho@...ho.ws>
Subject: Re: [PATCH v2 2/2] Add selftests for pidfd polling

On Tue, Apr 30, 2019 at 12:21:54PM -0400, Joel Fernandes (Google) wrote:
> Other than verifying pidfd based polling, the tests make sure that
> wait semantics are preserved with the pidfd poll. Notably the 2 cases:
> 1. If a thread group leader exits while threads still there, then no
>    pidfd poll notifcation should happen.
> 2. If a non-thread group leader does an execve, then the thread group
>    leader is signaled to exit and is replaced with the execing thread
>    as the new leader, however the parent is not notified in this case.
> 
> Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>

Applied to 

https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=for-next

and targeted for the 5.3 merge window.

Thank you all!
Christian