From: Florian Weimer <fweimer@redhat.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Jürg Billeter" <j@bitron.ch>,
"Christian Brauner" <christian@brauner.io>,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
luto@kernel.org, arnd@arndb.de, 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 14:44:36 +0100 [thread overview]
Message-ID: <877egm6a7v.fsf@oldenburg2.str.redhat.com> (raw)
In-Reply-To: <87efaun587.fsf@xmission.com> (Eric W. Biederman's message of "Thu, 06 Dec 2018 07:40:24 -0600")
* Eric W. Biederman:
> Floriam are you seeing a problem with this behavior or the way Christian
> was describing it?
My hope is that you could use taskfd_send_signal one day to send a
signal to a process which you *known* (based on how you've written your
application) should be running and not in a zombie state, and get back
an error if it has exited.
If you get this error, only then you wait on the process, using the file
descriptor you have, and run some recovery code.
Wouldn't that be a reasonable approach once we've got task descriptors?
Thanks,
Florian
next prev parent reply other threads:[~2018-12-06 13:44 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
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 [this message]
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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