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Message-ID: <20190726100252.GB16112@redhat.com>
Date: Fri, 26 Jul 2019 12:02:53 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Christian Brauner <christian@...uner.io>
Cc: linux-kernel@...r.kernel.org, arnd@...db.de, ebiederm@...ssion.com,
keescook@...omium.org, joel@...lfernandes.org, tglx@...utronix.de,
tj@...nel.org, dhowells@...hat.com, jannh@...gle.com,
luto@...nel.org, akpm@...ux-foundation.org, cyphar@...har.com,
torvalds@...ux-foundation.org, viro@...iv.linux.org.uk,
kernel-team@...roid.com
Subject: Re: [OFFLIST] [PATCH v1 0/2] pidfd: waiting on processes through
pidfds
Hi Christian,
just fyi, can't read this patch till Monday
On 07/26, Christian Brauner wrote:
> Hey everyone,
>
> /* v1 */
> This adds the ability to wait on processes using pidfds. This is one of
> the few missing pieces to make it possible to manage processes using
> only pidfds.
>
> Please note the following major changes (More details can be found in
> the individual commit changelogs.):
> - Add the new type P_PIDFD to waitid() instead of a new dedicated
> pidfd_wait() syscall.
> This is the same approach we discussed a few months ago and still
> prefer over adding a dedicated syscall.
> - Adapt the tests to the new type P_PIDFD for waitid().
> - Remove struct waitid_info patch.
> This will be sent out as a separate patch.
> - Remove CLONE_WAIT_PID patch.
> This will be sent out as a separate patch.
>
> The core patch for waitid is pleasantly small. The largest change is
> caused by adding proper tests for waitid(P_PIDFD).
>
> /* v0 */
> Link: https://lore.kernel.org/lkml/20190724144651.28272-1-christian@brauner.io
>
> Thanks!
> Christian
>
> Christian Brauner (2):
> pidfd: add P_PIDFD to waitid()
> pidfd: add pidfd_wait tests
>
> include/linux/pid.h | 4 +
> include/uapi/linux/wait.h | 1 +
> kernel/exit.c | 25 ++-
> kernel/fork.c | 8 +
> kernel/signal.c | 7 +-
> tools/testing/selftests/pidfd/pidfd.h | 25 +++
> tools/testing/selftests/pidfd/pidfd_test.c | 14 --
> tools/testing/selftests/pidfd/pidfd_wait.c | 245 +++++++++++++++++++++
> 8 files changed, 311 insertions(+), 18 deletions(-)
> create mode 100644 tools/testing/selftests/pidfd/pidfd_wait.c
>
> --
> 2.22.0
>
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