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Thu, 17 Oct 2024 09:22:30 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id jAfZB1bXEGccSAAAD6G6ig (envelope-from ); Thu, 17 Oct 2024 09:22:30 +0000 Message-ID: Date: Thu, 17 Oct 2024 11:22:29 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] vmscan: add a vmscan event for reclaim_pages Content-Language: en-US To: Jaewon Kim , sj@kernel.org, minchan@kernel.org, kaleshsingh@google.com, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, jaewon31.kim@gmail.com References: <20241016143227.961162-1-jaewon31.kim@samsung.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: <20241016143227.961162-1-jaewon31.kim@samsung.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 1CADE1C0020 X-Stat-Signature: azj95kzeosdkkd3eifm7hu1hchb1w7ra X-Rspam-User: X-HE-Tag: 1729156939-507795 X-HE-Meta: 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 JoLHUG8k i4PQUCQ1DorzPWJkmFlKBzTCra0Gs29AXtBIKW7I9WDq6X5ZZewI5rwRaGWdHkZp9/cOwbxbVpTplikJKDUOkJ04goz603hcQDQuKSmVZI4TqFldMFG4AOKU868Q0ihiKOO74OJqrqIGOiBO8NKKmJgGfHjwPI2y3OGyzqC6GIY3yEQ758+q4afhSR1sVuh2vqdP5Do6ITR4nR2uuVJjeys74eh2MWE1VHQpwrdTniBHbp6JLU912bbTpViRI6Xg+mTSNMypBEpHGPcRE00OGXRrV6aXl+9ECgcR49QP5JcYSiYrcn/94vFCnAIkcjj0BT8fyS5jn9qnOjatJyvweGCNPUvCq4z4ZIwz5owV26/ODMQYNpXjzKvBQE6xDmAWEXkfoTEmI5r8D2Gh7b/23iWmuYt5yMAM32Xkg2lc44omZphY= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000046, 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 10/16/24 16:32, Jaewon Kim wrote: > The reclaim_folio_list uses a dummy reclaim_stat and is not being > used. To know the memory stat, add a new trace event. This is useful how > how many pages are not reclaimed or why. > > This is an example. > mm_vmscan_reclaim_pages: nid=0 nr_scanned=112 nr_reclaimed=112 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=0 nr_unmap_fail=0 > > Currenlty reclaim_folio_list is only called by reclaim_pages, and > reclaim_pages is used by damon and madvise. In the latest Android, > reclaim_pages is also used by shmem to reclaim all pages in a > address_space. > > Signed-off-by: Jaewon Kim Acked-by: Vlastimil Babka