linux-kernel - Re: [PATCH RFC 1/2] Add polling support to pidfd

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Message-ID: <20190416124320.GA24643@redhat.com>
Date:   Tue, 16 Apr 2019 14:43:20 +0200
From:   Oleg Nesterov <oleg@...hat.com>
To:     "Joel Fernandes (Google)" <joel@...lfernandes.org>
Cc:     linux-kernel@...r.kernel.org, luto@...capital.net,
        rostedt@...dmis.org, dancol@...gle.com, christian@...uner.io,
        jannh@...gle.com, surenb@...gle.com, torvalds@...ux-foundation.org,
        Alexey Dobriyan <adobriyan@...il.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrei Vagin <avagin@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Kees Cook <keescook@...omium.org>,
        linux-fsdevel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Michal Hocko <mhocko@...e.com>, Nadav Amit <namit@...are.com>,
        Serge Hallyn <serge@...lyn.com>, Shuah Khan <shuah@...nel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Taehee Yoo <ap420073@...il.com>, Tejun Heo <tj@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tycho Andersen <tycho@...ho.ws>
Subject: Re: [PATCH RFC 1/2] Add polling support to pidfd

On 04/16, Oleg Nesterov wrote:
>
> And ->wait_pidfd should probably
> live in task->signal_struct.

but this will need the additional cleanup in free_signal_struct(),
list_del(&sig->wait_pidfd->head).

Oleg.