From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F16EEC98302 for ; Wed, 23 Sep 2026 06:35:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8CF116B0088; Wed, 23 Sep 2026 02:35:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 87FF36B008A; Wed, 23 Sep 2026 02:35:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 76E326B00AA; Wed, 23 Sep 2026 02:35:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 4F1D46B0088 for ; Wed, 23 Sep 2026 02:35:56 -0400 (EDT) Received: from smtpin19.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id B83B7A0711 for ; Wed, 23 Sep 2026 06:35:55 +0000 (UTC) X-FDA: 85244066670.19.C3BB126 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf11.hostedemail.com (Postfix) with ESMTP id E948D40008 for ; Wed, 23 Sep 2026 06:35:53 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=Y6nkKtCz; spf=pass (imf11.hostedemail.com: domain of vbabka@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1790145354; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=0lkUVys8gvUjF/9PcP1iToEGr3wc3OwcQw4hSpUPIN0=; b=sAGPh67gJW/4RLfwZvA20r18HrXB36d2am8wdkYHXeITRYpYtvno9p02XTPLFN9ZUivSjF mEqa1hz223a+LZWMVwhfYIQFmiOix9Cy1ep5llw9fINYu1LTPqME1LZMxdVksyE/G9Rgwe DIXBdOSI+gTw8qBPCwwauPdbuVZoNTY= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1790145354; b=jVA5KKlSETmkOl9CJcsS7OBBXkjquLgvEk0OtR9mv2jIFvzgM9wb1ioLkU005KW0rPR5vo enCPUyMwYsHijxoLrna9jdcX5np5P5TRtbizPOhljVITR7E0Bw6eLdBucr4nN21ckaPypu GPUpsrtGVm++N9qw6ktDcRNUrnU7e74= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=Y6nkKtCz; spf=pass (imf11.hostedemail.com: domain of vbabka@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 29120436F4; Wed, 23 Sep 2026 06:35:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1F34E1F000FF; Wed, 23 Sep 2026 06:35:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790145353; bh=0lkUVys8gvUjF/9PcP1iToEGr3wc3OwcQw4hSpUPIN0=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Y6nkKtCzEeqId9jMLa0VpqG7vVmn6qXI47fFEsnF917E5SKaQy8E14ioPXN/eoegQ CfgIhwCcqL1okZeQtygWog5zd0RFe+uSsZXrzBmPHzWXEJtXG4ypSy+1uD5rFx9Cj7 l/9d6pUxhAMnzY4DpakXGPQ7BZPsnQECF3dV0jopfD4LGmhoEGsvCxRlCxIert7RYm IE2KgQ2Xs93KwTdDGmGbOPGanWdhNR0wzp8hJs1oXu/lL57s9Qm0trbH93804Yz3oh kTdqLdQ5HpGG0fDu+C+Zc5TGoeH2uT3I0dfV6+9T45m+fCB7i6NV574TgvmTMJisBa ruNJ0CX+0KYVA== Message-ID: <7ea6e90a-e2fb-4793-b6ea-e292388bdfdf@kernel.org> Date: Wed, 23 Sep 2026 08:35:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [linus:master] [mm/secretmem] 97d34aa65c: stress-ng.secretmem.ops_per_sec 99.5% regression Content-Language: en-US To: kernel test robot , Lorenzo Stoakes Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Andrew Morton , Daehyeon Ko <4ncienth@gmail.com>, Mike Rapoport , David Hildenbrand , Alexei Starovoitov , "David S. Miller" , Hagen Paul Pfeifer , Jakub Kacinski , James Bottomley , Jesper Dangaard Brouer , John Fastabend , "Liam R. Howlett" , Michal Hocko , Stanislav Fomichev , Suren Baghdasaryan , linux-mm@kvack.org References: <202609230824.7a9189aa-lkp@intel.com> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; 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 BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSNWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBrZXJuZWwub3JnPsLBsAQTAQoAWhYhBKlA1DSZLC6OmRA9UCJPp+fM gqZkBQJqFFy6GxSAAAAAAAQADm1hbnUyLDIuNSsxLjEyLDIsMgIbAwUJGtCBUAULCQgHAwUV CgkICwUWAgMBAAIeBQIXgAAKCRAiT6fnzIKmZJIUEADFx/tREzUImHrEwVHeSvDFmA7tJysI UVrlvrM09E7GIuzphzv7jYmo8n3ANpCczLEVr4G0syYQdTigaZgv3+FQDIIzhKih1IHhu1Ei XHlywNWKnQxxQEUNi5Mwx43wQz5XVw9F1A7gtKBKNtfogO511hAbrzagrYajyQacEJ/+sfhZ 9Da8ltHIXD8pcYaHUfQgEusCgmEd9+KrUwrTbckFKmYq5chuE6yJ4J0EmWknL096jIE6CnzF FRslQ3B1UKDjxVsm1ZHfir5NeWszLkTvGFsddFaWTgh8UycESG6VQzKXjjewXu2pG7YQYRpj QKm1W5X2TkwWkXRBZTmfmbhxIUMh3+zf5wQ463rSmDN/8v81tdqBtAW6rH/kzg1GvkaTHXn0 507yEHFzBksk2viAuIxxr7km8+/KARYLIdGtx30EG8cKzAUZOK6WqxtNCsXUJNrVE8CWrCaD icoNu7Fs1c5hmPHdSTnU48ce67449DdnO4neLSNhRiGlMHJgfJUmgrxu/hcYeOZ3haWmEQ2w uW1Mh01OHi8QZHCEyAbABrPs9GUgccc/4eYXX9hIgxfSkYzn8f+8NuIFPWl/0uTvjgqU29FQ SbzOLxHq9439Ox40G5mS5eZXRGxITYR+6TXvRGI6P/264jvflnr/pDGUttaikU+0W+1uxgKH cmYbEc7ATQRbGTU1AQgAn0H6UrFiWcovkh6EXVcl+SeqyO6JHOPm+e9Wu0Vw+VIUvXZVUVVQ La1PQDUi6j00ChlcR66g9/V0sPIcSutacPKfdKYOBvzd4rlhL8rfrdEsQw5ApZxrA8kYZVMh FmBRKAa6wos25moTlMKpCWzTH84+WO5+ziCTsTUZASAToz3RdunTD+vQcHj0GqNTPAHK63sf bAB2I0BslZkXkY1RLb/YhuA6E7JyEd2pilZOrIuBGl/5q2qSakgnAVFWFBR/DO27JuAksYnq +aH8vI0xGvwn75KqSk4UzAkDzWSmO4ZHuahKtQgZNsMYV+PGayRBX9b9zbldzopoLBdqHc4n jQARAQABwsF8BBgBCgAmAhsMFiEEqUDUNJksLo6ZED1QIk+n58yCpmQFAmfIHFQFCRYU6J8A CgkQIk+n58yCpmS2PA//bqN1LfcotmArgElsa+0EGZSQlYgK48pm8WAeTXTngudP9IJ4SuKY HR5RNjHcBeqN+Me0zxRqYzRb8nGanHEkDyf4Im8DQM8d6vbyU+FcPmG4skud4kgS1zMHnlVd SXfSIwKC/hKgdHG8aBV7545Lz9X6Iohea+94wneD0aw/hqF+QWewGZhWJriWAZtvEkzNjQOi 4U9F/trLten/x7bpphDSnDMKJtITbtzATT1Dq7o7VpIUK1nCTQALMuMjKCdi8OdU/+V+R3O4 0PXWvX8qrvqYapVbZ+9KqT74FsuB0Ya9uXwgBF2Q6cRuETZk5vqaqKxzqoQZCO8AOz/58j6O 2RHNy/mZEN+7tJ5Tsq42zVJ4jxsT8b9YplavCMsnBgDeRWhcbYhCyttoL7nYISyWg4kQYZ/P wIV3OuNv2f8iKYsxNsRuClOAF82+gvqOy1/1pprFjy8uo2pkoOrb63aOP3vO5VHnRKgra6dq NcaZ+c6J4H+nEJGi2SkHAUJz5oBzuThvPudLvPA/SK8sKoM01IRxSihev/S/5WLazXB1PGem OCbvzC1IjWJJraxiDJ5IygokapUa2RP7+WBR22skQ3SSl6G107QgWKSyTOGWEaRmV53vxQLV jXuCmzSSasTL60zq5yGrT4/DYQVSNEUiUbG4pYekxJujNeEDkUlky0Y= In-Reply-To: <202609230824.7a9189aa-lkp@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: knrkxwd93xdcyajhwwxqqksd7m75gj8n X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: E948D40008 X-HE-Tag: 1790145353-643638 X-HE-Meta: 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 ZcWwM2zD 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/23/26 03:00, kernel test robot wrote: > > > Hello, > > kernel test robot noticed a 99.5% regression of stress-ng.secretmem.ops_per_sec on: > > commit: 97d34aa65c29cca85e3e9050f4c936389b38a054 ("mm/secretmem: properly account locked pages") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master Well maybe there is some inefficiency that can be fixed (haven't checked) but if it's the cost for proper accounting then so be it? I doubt creating secretmem pages is something userspace would have to do intensively enough to matter. > testcase: stress-ng > config: x86_64-rhel-9.4 > compiler: gcc-14 > test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory > parameters: > > nr_threads: 100% > testtime: 60s > test: secretmem > cpufreq_governor: performance > > If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-lkp/202609230824.7a9189aa-lkp@intel.com > > > Details are as below: > --------------------------------------------------------------------------------------------------> > > The kernel config and materials to reproduce are available at: > https://download.01.org/0day-ci/archive/20260923/202609230824.7a9189aa-lkp@intel.com > > ========================================================================================= > compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: > gcc-14/performance/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-spr-r02/secretmem/stress-ng/60s > > commit: > 35b0fb391b ("mm/mremap: reset unfaulted VMA page offset for MREMAP_DONTUNMAP") > 97d34aa65c ("mm/secretmem: properly account locked pages") > > 35b0fb391b0df573 97d34aa65c29cca85e3e9050f4c > ---------------- --------------------------- > %stddev %change %stddev > \ | \ > 6080503 -99.6% 23092 ± 3% stress-ng.secretmem.ops > 85584 -99.5% 385.28 ± 3% stress-ng.secretmem.ops_per_sec > 71.48 -16.0% 60.07 stress-ng.time.elapsed_time > 71.48 -16.0% 60.07 stress-ng.time.elapsed_time.max > 97435 ± 2% +1276.4% 1341103 stress-ng.time.involuntary_context_switches > 230308 -96.1% 9096 stress-ng.time.maximum_resident_set_size > 18401243 +3349.6% 6.348e+08 stress-ng.time.minor_page_faults > 20417 -8.7% 18639 stress-ng.time.percent_of_cpu_this_job_got > 14581 -25.0% 10937 stress-ng.time.system_time > 13.34 +1858.5% 261.33 stress-ng.time.user_time > 6898 ± 2% +96037.7% 6631576 ± 3% stress-ng.time.voluntary_context_switches > > Disclaimer: > Results have been estimated based on internal Intel analysis and are provided > for informational purposes only. Any difference in system hardware or software > design or configuration may affect actual performance. > >