linux-kernel - Re: [PATCH v1 00/14] futex: More futex2 bits

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Message-Id: <59ba1179-d166-4bae-b7b6-c1084471192e@app.fastmail.com>
Date:   Fri, 21 Jul 2023 17:49:56 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Peter Zijlstra" <peterz@...radead.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        "Jens Axboe" <axboe@...nel.dk>
Cc:     linux-kernel@...r.kernel.org, "Ingo Molnar" <mingo@...hat.com>,
        "Darren Hart" <dvhart@...radead.org>, dave@...olabs.net,
        andrealmeid@...lia.com,
        "Andrew Morton" <akpm@...ux-foundation.org>, urezki@...il.com,
        "Christoph Hellwig" <hch@...radead.org>,
        "Lorenzo Stoakes" <lstoakes@...il.com>, linux-api@...r.kernel.org,
        linux-mm@...ck.org, Linux-Arch <linux-arch@...r.kernel.org>,
        malteskarupke@....de
Subject: Re: [PATCH v1 00/14] futex: More futex2 bits

On Fri, Jul 21, 2023, at 12:22, Peter Zijlstra wrote:
> Hi,
>
> New version of the futex2 patches. These are actually tested and appear to work
> as expected.
>
> I'm hoping to get at least the first 3 patches merged such that Jens can base
> the io_uring futex patches on them.
>
>
> Changes since v0:
>  - switched over to 'unsigned long' for values (Arnd)
>  - unshare vmalloc_huge() (Willy)
>  - added wait/requeue syscalls
>  - fixed NUMA to support sparse nodemask
>  - added FUTEX2_n vs FUTEX2_NUMA check to ensure
>    the node_id fits in the futex
>  - added selftests
>  - fixed a ton of silly bugs

The changes look good to me, and the ABI should be fine without
special compat handler now. I sent a couple of minor comments, but
nothing important.

     Arnd