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From: Florian Weimer <fweimer@redhat.com>
To: Christian Brauner <christian@brauner.io>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
	luto@kernel.org, arnd@arndb.de, ebiederm@xmission.com,
	serge@hallyn.com, jannh@google.com, akpm@linux-foundation.org,
	oleg@redhat.com, cyphar@cyphar.com, viro@zeniv.linux.org.uk,
	linux-fsdevel@vger.kernel.org, dancol@google.com,
	timmurray@google.com, linux-man@vger.kernel.org,
	keescook@chromium.org, tglx@linutronix.de, x86@kernel.org
Subject: Re: [PATCH v4] signal: add taskfd_send_signal() syscall
Date: Thu, 06 Dec 2018 13:30:19 +0100	[thread overview]
Message-ID: <87h8fq7s84.fsf@oldenburg2.str.redhat.com> (raw)
In-Reply-To: <20181206121858.12215-1-christian@brauner.io> (Christian Brauner's message of "Thu, 6 Dec 2018 13:18:58 +0100")

* Christian Brauner:

> /* zombies */
> Zombies can be signaled just as any other process. No special error will be
> reported since a zombie state is an unreliable state (cf. [3]).

I still disagree with this analysis.  If I know that the target process
is still alive, and it is not, this is a persistent error condition
which can be reliably reported.  Given that someone might send SIGKILL
to the process behind my back, detecting this error condition could be
useful.

Rest looks good to me (with the usual caveats).

Thanks,
Florian

  reply	other threads:[~2018-12-06 12:30 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-06 12:18 [PATCH v4] signal: add taskfd_send_signal() syscall Christian Brauner
2018-12-06 12:30 ` Florian Weimer [this message]
2018-12-06 12:45   ` Jürg Billeter
2018-12-06 13:12     ` Florian Weimer
2018-12-06 13:18       ` Jürg Billeter
2018-12-06 13:20         ` Florian Weimer
2018-12-06 13:40       ` Eric W. Biederman
2018-12-06 13:44         ` Florian Weimer
2018-12-06 14:27           ` Aleksa Sarai
2018-12-06 14:46           ` Eric W. Biederman
2018-12-06 12:53   ` Christian Brauner
2018-12-06 13:17     ` Florian Weimer
2018-12-06 15:01 ` Eric W. Biederman
2018-12-06 16:17   ` Daniel Colascione
2018-12-06 17:24     ` Eric W. Biederman
2018-12-06 17:41       ` Christian Brauner
2018-12-06 18:30         ` Kees Cook
2018-12-06 22:27           ` Serge E. Hallyn
2018-12-06 17:14   ` Christian Brauner
2018-12-06 19:17     ` Eric W. Biederman
2018-12-06 19:30       ` Christian Brauner
2018-12-06 20:29         ` Eric W. Biederman
2018-12-06 20:37           ` Daniel Colascione
2018-12-06 22:22             ` Eric W. Biederman
2018-12-06 22:43               ` Daniel Colascione
2018-12-06 21:31           ` Christian Brauner
2018-12-06 21:46             ` Eric W. Biederman
2018-12-06 22:01               ` Daniel Colascione
2018-12-06 22:39               ` Christian Brauner
2018-12-06 23:17                 ` Christian Brauner
2018-12-07  0:31                   ` Serge E. Hallyn
2018-12-07  0:34                     ` Daniel Colascione
2018-12-07  0:59                       ` Serge E. Hallyn
2018-12-07  1:39                         ` Daniel Colascione
2018-12-07  1:54                           ` Christian Brauner
2018-12-07 16:49                             ` Serge E. Hallyn
2018-12-07 16:47 ` Serge E. Hallyn
2018-12-08 21:46 ` kbuild test robot

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