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Wed, 17 Nov 2021 15:17:27 -0800 (PST) Received: from [192.168.1.116] ([66.219.217.159]) by smtp.gmail.com with ESMTPSA id b15sm844654iln.36.2021.11.17.15.17.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 17 Nov 2021 15:17:27 -0800 (PST) Subject: Re: [PATCH] Increase default MLOCK_LIMIT to 8 MiB To: Johannes Weiner , Andrew Morton Cc: Ammar Faizi , Drew DeVault , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, io_uring Mailing List , Pavel Begunkov , linux-mm@kvack.org References: <20211028080813.15966-1-sir@cmpwn.com> <593aea3b-e4a4-65ce-0eda-cb3885ff81cd@gnuweeb.org> <20211115203530.62ff33fdae14927b48ef6e5f@linux-foundation.org> From: Jens Axboe Message-ID: Date: Wed, 17 Nov 2021 16:17:26 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: C382250000BD X-Stat-Signature: kugfbg3k6b53hk4peuz7u454ht3r6tib Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=kernel-dk.20210112.gappssmtp.com header.s=20210112 header.b=2PdrfO7y; spf=pass (imf04.hostedemail.com: domain of axboe@kernel.dk designates 209.85.166.44 as permitted sender) smtp.mailfrom=axboe@kernel.dk; dmarc=none X-HE-Tag: 1637191047-470788 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 11/17/21 3:26 PM, Johannes Weiner wrote: >> Link: https://lkml.kernel.org/r/20211028080813.15966-1-sir@cmpwn.com >> Signed-off-by: Drew DeVault >> Acked-by: Jens Axboe >> Acked-by: Cyril Hrubis >> Cc: Pavel Begunkov >> Signed-off-by: Andrew Morton > > Acked-by: Johannes Weiner > > As per above, I think basing it off of RAM size would be better, but > this increase is overdue given all the new users beyond mlock(), and > 8M is much better than the current value. That's basically my reasoning too. Let's just get something going that will at least unblock some valid use cases, and not get bogged down with aiming for perfection. The latter can happen in parallel, but it should not hold it up imho. -- Jens Axboe