linux-kernel - Re: [PATCH 1/1] mm: introduce process

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Date:   Wed, 07 Jul 2021 11:46:42 +0200
From:   Florian Weimer <fweimer@...hat.com>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     akpm@...ux-foundation.org, mhocko@...nel.org, mhocko@...e.com,
        rientjes@...gle.com, willy@...radead.org, hannes@...xchg.org,
        guro@...com, riel@...riel.com, minchan@...nel.org,
        christian@...uner.io, hch@...radead.org, oleg@...hat.com,
        david@...hat.com, jannh@...gle.com, shakeelb@...gle.com,
        timmurray@...gle.com, linux-api@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH 1/1] mm: introduce process_reap system call

* Suren Baghdasaryan:

> The API is as follows,
>
>           int process_reap(int pidfd, unsigned int flags);
>
>         DESCRIPTION
>           The process_reap() system call is used to free the memory of a
>           dying process.
>
>           The pidfd selects the process referred to by the PID file
>           descriptor.
>           (See pidofd_open(2) for further information)
>
>           The flags argument is reserved for future use; currently, this
>           argument must be specified as 0.
>
>         RETURN VALUE
>           On success, process_reap() returns 0. On error, -1 is returned
>           and errno is set to indicate the error.

I think the manual page should mention what it means for a process to be
“dying”, and how to move a process to this state.

Thanks,
Florian