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Date:   Fri, 19 Nov 2021 08:41:58 +0100
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From:   "Drew DeVault" <sir@cmpwn.com>
To:     "Andrew Morton" <akpm@linux-foundation.org>,
        "Jens Axboe" <axboe@kernel.dk>
Cc:     "Johannes Weiner" <hannes@cmpxchg.org>,
        "Ammar Faizi" <ammarfaizi2@gnuweeb.org>,
        <linux-kernel@vger.kernel.org>, <linux-api@vger.kernel.org>,
        "io_uring Mailing List" <io-uring@vger.kernel.org>,
        "Pavel Begunkov" <asml.silence@gmail.com>, <linux-mm@kvack.org>
Subject: Re: [PATCH] Increase default MLOCK_LIMIT to 8 MiB
References: <20211028080813.15966-1-sir@cmpwn.com>
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 <20211115203530.62ff33fdae14927b48ef6e5f@linux-foundation.org>
 <YZWBkZHdsh5LtWSG@cmpxchg.org>
 <ec24ff4e-8413-914c-7cdf-203a7a5f0586@kernel.dk>
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On Thu Nov 18, 2021 at 10:58 PM CET, Andrew Morton wrote:
> Nobody's aiming for perfection. We're discussing aiming for "better".
>
> What we should have done on day one was to set the default MLOCK_LIMIT
> to zero bytes. Then everyone would have infrastructure to tune it from
> userspace and we wouldn't ever have this discussion.

Setting aside perfection or not, what you're aiming for is about 1000=C3=97
more work. I'm not prepared to do that work. I'm not going to paint this
same bikeshed 100 times for each Linux distro we have to convince to
adopt a more sophisticated solution.