From: Josh Triplett <josh@joshtriplett.org>
To: linux-kernel@vger.kernel.org
Cc: Christian Brauner <christian@brauner.io>,
Jens Axboe <axboe@kernel.dk>,
Michael Kerrisk <mtk.manpages@gmail.com>,
linux-doc@vger.kernel.org
Subject: pidfd and O_NONBLOCK
Date: Tue, 11 Aug 2020 11:12:36 -0700 [thread overview]
Message-ID: <20200811181236.GA18763@localhost> (raw)
As far as I can tell, O_NONBLOCK has no effect on a pidfd. When calling
waitid on a pidfd for a running process, it always blocks unless you
provide WNOHANG.
I don't think anything depends on that behavior. Would it be possible to
make O_NONBLOCK on a pidfd cause waitid on a running process to return
EWOULDBLOCK?
This would make it easier to use pidfd in some non-blocking event loops.
- Josh Triplett
next reply other threads:[~2020-08-11 18:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-11 18:12 Josh Triplett [this message]
2020-08-11 20:10 ` pidfd and O_NONBLOCK Christian Brauner
2020-08-11 21:13 ` Josh Triplett
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