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Date:   Tue, 16 Nov 2021 07:32:33 +0100
Message-Id: <CFQZSHV700KV.18Y62SACP8KOO@taiga>
Cc:     <linux-kernel@vger.kernel.org>, <linux-api@vger.kernel.org>,
        "io_uring Mailing List" <io-uring@vger.kernel.org>,
        "Jens Axboe" <axboe@kernel.dk>,
        "Pavel Begunkov" <asml.silence@gmail.com>, <linux-mm@kvack.org>
Subject: Re: [PATCH] Increase default MLOCK_LIMIT to 8 MiB
From:   "Drew DeVault" <sir@cmpwn.com>
To:     "Andrew Morton" <akpm@linux-foundation.org>,
        "Ammar Faizi" <ammarfaizi2@gnuweeb.org>
References: <20211028080813.15966-1-sir@cmpwn.com>
 <CAFBCWQ+=2T4U7iNQz_vsBsGVQ72s+QiECndy_3AMFV98bMOLow@mail.gmail.com>
 <CFII8LNSW5XH.3OTIVFYX8P65Y@taiga>
 <593aea3b-e4a4-65ce-0eda-cb3885ff81cd@gnuweeb.org>
 <20211115203530.62ff33fdae14927b48ef6e5f@linux-foundation.org>
In-Reply-To: <20211115203530.62ff33fdae14927b48ef6e5f@linux-foundation.org>
Precedence: bulk

On Tue Nov 16, 2021 at 5:35 AM CET, Andrew Morton wrote:
> Unfortunately I didn't know about this until Nov 4, which was formally
> too late for 5.16. I guess I could try to sneak it past Linus if
> someone were to send me some sufficiently convincing words explaining
> the urgency.

I don't think it's that urgent, but I also wouldn't protest if someone
wants to usher it in sooner rather than later.

> And a question: rather than messing around with a constant which will
> need to be increased again in a couple of years, can we solve this one
> and for all? For example, permit root to set the system-wide
> per-process max mlock size and depend upon initscripts to do this
> appropriately.

Not sure I understand. Root and init scripts can already manage this
number - the goal of this patch is just to provide a saner default.