linux-kernel - Re: [PATCH] Increase default MLOCK

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Message-ID: <10ccf01b-f13a-d626-beba-cbee70770cf1@redhat.com>
Date:   Tue, 23 Nov 2021 14:39:19 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Jason Gunthorpe <jgg@...pe.ca>
Cc:     Jens Axboe <axboe@...nel.dk>,
        Andrew Dona-Couch <andrew@...acou.ch>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Drew DeVault <sir@...wn.com>,
        Ammar Faizi <ammarfaizi2@...weeb.org>,
        linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
        io_uring Mailing List <io-uring@...r.kernel.org>,
        Pavel Begunkov <asml.silence@...il.com>, linux-mm@...ck.org
Subject: Re: [PATCH] Increase default MLOCK_LIMIT to 8 MiB

> 
>> 2) Could be provide a mmu variant to ordinary users that's just good
>> enough but maybe not as fast as what we have today? And limit
>> FOLL_LONGTERM to special, privileged users?
> 
> rdma has never been privileged

Feel free to correct me if I'm wrong: it requires special networking
hardware and the admin/kernel has to prepare the system in a way such
that it can be used.

-- 
Thanks,

David / dhildenb