linux-kernel - Re: [PATCH v7 1/6] pidfd: add PIDFD_SELF* sentinels to refer to own thread/process

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Message-ID: <gij5nh63s73dj5u33uvzl5lbmsvoh6zr5xnqpnfltwi6aamy7j@47iop2wgtdac>
Date: Tue, 11 Feb 2025 16:24:07 +0100
From: Michal Koutný <mkoutny@...e.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Christian Brauner <christian@...uner.io>, 
	Shuah Khan <shuah@...nel.org>, "Liam R . Howlett" <Liam.Howlett@...cle.com>, 
	Suren Baghdasaryan <surenb@...gle.com>, Vlastimil Babka <vbabka@...e.cz>, pedro.falcato@...il.com, 
	linux-kselftest@...r.kernel.org, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, 
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Oliver Sang <oliver.sang@...el.com>, John Hubbard <jhubbard@...dia.com>, Tejun Heo <tj@...nel.org>, 
	Johannes Weiner <hannes@...xchg.org>, Andrew Morton <akpm@...ux-foundation.org>, 
	Shakeel Butt <shakeel.butt@...ux.dev>
Subject: Re: [PATCH v7 1/6] pidfd: add PIDFD_SELF* sentinels to refer to own
 thread/process

On Thu, Jan 30, 2025 at 08:40:26PM +0000, Lorenzo Stoakes <lorenzo.stoakes@...cle.com> wrote:
> 
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
> ---
>  include/uapi/linux/pidfd.h |  24 +++++++++
>  kernel/pid.c               |  24 +++++++--
>  kernel/signal.c            | 106 ++++++++++++++++++++++---------------
>  3 files changed, 107 insertions(+), 47 deletions(-)

Practical idea, thanks.

> diff --git a/include/uapi/linux/pidfd.h b/include/uapi/linux/pidfd.h
> + * To cut the Gideon knot, for internal kernel usage, we refer to

A nit
https://en.wikipedia.org/wiki/Gordian_Knot

(if still applicable)

Michal

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