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b=GPSSFMUeMfvyY0v6aStotudcJqKTHE6fhDx5P7P4axot0d6U9xsHIxl2p+VvfPAYV rgdZfM7oxVDJ8jFFaz5RymK7gAWktpBIlA/ryEeTgmkZ+aIbCDjcAFMFbnSrmgXBL3 7VdyzRmoA53G7vQ+hqm07gyCnfSTWeoIKbS05aSXf8UNpEFereA3z7VAWI9LhbNdZq E+hwO7jVtW+7RhbO0238gEXvEeYlB1eO3mScREpT1L/5VXHkKRPV/Ep5N12UVY89Xd 9Ic0ESy7ea+iLNQNLjs1SopSp8TYUr7d916+wba1LPR+iOLtmhc9XYduSzF/Bit38Z bjGYcaIepbWUQ== Message-ID: <11a4ca6a-9534-4f3d-bda6-4caf460c6854@kernel.org> Date: Fri, 6 Feb 2026 10:03:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH mm-new v6 2/5] mm: khugepaged: refine scan progress number To: Dev Jain , Vernon Yang Cc: akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, ziy@nvidia.com, baohua@kernel.org, lance.yang@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vernon Yang References: <20260201122554.1470071-1-vernon2gm@gmail.com> <20260201122554.1470071-3-vernon2gm@gmail.com> <85e8ded9-a9eb-4663-9c96-93af60006fb6@kernel.org> <9508744b-e5d5-49ef-825f-eef683892541@arm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: F0C251A000A X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: 8w1qigtnofa1w97q4fr671fctapac6qp X-HE-Tag: 1770368633-29339 X-HE-Meta: U2FsdGVkX18Y4gpDkBdwvok4SS/xjoK5EUKVqaMgYYBfv7yWyD/14pjyeJP6kMe/I/wHaWMIvJuGXq5Z2pLLAEif/JRIMfiB1J35PeSm7ctq7bbFW528evl5xhbQCXCkNvJ6UKcYYhqfZmll7tAVsr88SkValsAV//mUT97t9eILaay1SkLDWirkEXQ3O3xSagseVS5FdyutU21BPPIKEU63Ktn+AgBmEINbdnFaaH3BX4M2k+TmzLMwOPBBCrFZ1KZ6fD6PnJzczGZ7wh1uPPhN9V99pK2VomwEqiljceNimj4QtpZ6UgISP+hgrtILsA2oVACGOlRkpaBAvTni4bHdNFkMcRnP7OqTlefvi8psKDKyWR/aomJqTZI62gBxRph1T1faYxlHLuuz8/L9YGE3cap3yLJndYFtBQD/u7IQDXj/FIaTjLMSOuPdHuY+UfzU2h2iWi1ioIkN1XWrV5EqiSLE86pKyfc+F83srd4VRe9fpnj75R9TDg8hrJfiuTwg3KiNrO+8UsJPsEpTEvBC2BX21xUp4HIU0qGyb5QC85P7dH31GzIHewNAitFDrvEoRSmgj8i16KTD6wfnH6hy0eEZhFZZ55LoCSMN4E48EJu3XUx/8oayludLzWZkSNq/+xuV4uKUpcynRq3bPWn/7o56fXoczgSasc4Yz9O8upg35prPbkKp2R/bvhK37Xi52QI7kvX/KwHUyDH4pV2AU9sdnCdRTbznNnTuUBA1Pou/H17Iq7SmR3yUetXdy9+YaCGI7TqFdZzhWPvFm4k6Bu2qwHYvFSJoaD7D5Qv96PR3ILWisZvKU0v60zcb0q0ZYvp4V+14By2Z9jjCGRbj3x3ZcXLFHyiZTjtEdTiH3KQS8kPZAndxUYrl1IHE4S5mIlPCYmuSk+lwIDdi5GT5Ap6A8lWe9ZySCMc/j+Bvm8x2A0Ql6wRhHosiVdIMAn7d6FAL59Iu1hTCNug nS8jat3Y BD/3SFfJpOdpBBHPu8rYUj4oXqp1bW2LZk584wqa+8Vc4op0+vO7lTbH8Nq9UoY/9M4a9ZN2ZraBR7Wr0t8nU1metLRuDvyvdvYcc6oYL8D0esicnrI+hud7KLHS1KD+xMuTs6X83klSIhHq75iyJqlQUJvQnQJZ76wDYELCuRHIpS2y8IwYkND7Cx+WMQfJptEZrxbqEpK9XZ8ciX8GNla74TUOJGYwHQFMqXjD687J/TYhYIES9bwdNlR5428Vi91rj 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: List-Subscribe: List-Unsubscribe: On 2/5/26 15:30, Dev Jain wrote: > > On 05/02/26 7:55 pm, Dev Jain wrote: >> On 05/02/26 5:41 pm, David Hildenbrand (arm) wrote: >>> Yes! >>> >>> Why do we even have to optimize this? :) >>> >>> Premature ... ? :) >> >> I mean .... we don't, but the alternate is a one liner using max(). >> >> The objective is to compute the number of iterations of the for-loop. >> >> It just seems weird to me to track that in the loop, when we have the >> >> loop iterator, which *literally* does that only. > > I realize I shouldn't have bolded out the "literally" - below I wrote that > I won't shout, but the bold seems like shouting :) Heh. The thing is that the loop iterator does not quite what we want, otherwise we wouldn't have to mess with max() etc. -- Cheers, David