linux-kernel - Re: [PATCH v7 0/6] introduce PIDFD

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Message-ID: <7a8a1719-466f-4e10-b1eb-9e9e1ef8ad52@lucifer.local>
Date: Tue, 4 Feb 2025 10:01:44 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Christian Brauner <brauner@...nel.org>
Cc: 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>, Michal Koutny <mkoutny@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shakeel Butt <shakeel.butt@...ux.dev>
Subject: Re: [PATCH v7 0/6] introduce PIDFD_SELF* sentinels

On Tue, Feb 04, 2025 at 10:46:35AM +0100, Christian Brauner wrote:
> On Thu, 30 Jan 2025 20:40:25 +0000, Lorenzo Stoakes wrote:
> > If you wish to utilise a pidfd interface to refer to the current process or
> > thread it is rather cumbersome, requiring something like:
> >
> > 	int pidfd = pidfd_open(getpid(), 0 or PIDFD_THREAD);
> >
> > 	...
> >
> > [...]
>
> Updated merge message. I've slightly rearranged pidfd_send_signal() so
> we don't have to call CLASS(fd, f)(pidfd) unconditionally anymore.

Sounds good and thank you! Glad to get this in :)

>
> ---
>
> Applied to the vfs-6.15.pidfs branch of the vfs/vfs.git tree.
> Patches in the vfs-6.15.pidfs branch should appear in linux-next soon.
>
> Please report any outstanding bugs that were missed during review in a
> new review to the original patch series allowing us to drop it.
>
> It's encouraged to provide Acked-bys and Reviewed-bys even though the
> patch has now been applied. If possible patch trailers will be updated.
>
> Note that commit hashes shown below are subject to change due to rebase,
> trailer updates or similar. If in doubt, please check the listed branch.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
> branch: vfs-6.15.pidfs
>
> [1/6] pidfd: add PIDFD_SELF* sentinels to refer to own thread/process
>       https://git.kernel.org/vfs/vfs/c/e6e4ed42f8d8
> [2/6] selftests/pidfd: add missing system header imcludes to pidfd tests
>       https://git.kernel.org/vfs/vfs/c/c9f04f4a251d
> [3/6] tools: testing: separate out wait_for_pid() into helper header
>       https://git.kernel.org/vfs/vfs/c/fb67fe44116e
> [4/6] selftests: pidfd: add pidfd.h UAPI wrapper
>       https://git.kernel.org/vfs/vfs/c/ac331e56724d
> [5/6] selftests: pidfd: add tests for PIDFD_SELF_*
>       https://git.kernel.org/vfs/vfs/c/881a3515c191
> [6/6] selftests/mm: use PIDFD_SELF in guard pages test
>       https://git.kernel.org/vfs/vfs/c/b4703f056f42