From nobody Sat Mar 08 21:09:12 2025 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Z9GHC4cLRz5q2Gr for ; Sat, 08 Mar 2025 21:18:47 +0000 (UTC) (envelope-from li-fbsd@citylink.dinoex.sub.org) Received: from uucp.dinoex.org (uucp.dinoex.org [IPv6:2a0b:f840::12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "uucp.dinoex.sub.de", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Z9GH84wBqz3jK0 for ; Sat, 08 Mar 2025 21:18:44 +0000 (UTC) (envelope-from li-fbsd@citylink.dinoex.sub.org) Authentication-Results: mx1.freebsd.org; dkim=none; arc=pass ("uucp.dinoex.org:s=M20221114:i=1"); dmarc=none; spf=pass (mx1.freebsd.org: domain of li-fbsd@citylink.dinoex.sub.org designates 2a0b:f840::12 as permitted sender) smtp.mailfrom=li-fbsd@citylink.dinoex.sub.org Received: from uucp.dinoex.org (uucp.dinoex.org [IPv6:2a0b:f840:0:0:0:0:0:12]) by uucp.dinoex.org (8.18.1/8.18.1) with ESMTPS id 528LI7KB034612 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Sat, 8 Mar 2025 22:18:07 +0100 (CET) (envelope-from li-fbsd@citylink.dinoex.sub.org) ARC-Seal: i=1; a=rsa-sha256; d=uucp.dinoex.org; s=M20221114; t=1741468690; cv=none; b=PTOXucuHCI4uWnbIGuFwQCq4P6AIRDLx7UZ9JjZb5G05GCfUuXVk6vazdx3fv7MEaXHDt4TF6BVFwXY5xbzew9qfdMpuhq08dlYqSNt68SzD9m2GJytTeGOo/PeQBS85lb4/PToGstWm+Ig7SJwsCzJxga/xSkPxlZv9RSck34c= ARC-Message-Signature: i=1; a=rsa-sha256; d=uucp.dinoex.org; s=M20221114; t=1741468690; c=relaxed/simple; bh=SfdFZgdzA2Hwp6irAnNGNMVPSesjQnHZhprvQJPMtMQ=; h=Received:Received:Received:X-Authentication-Warning:From: X-Newsgroups:Subject:Date:Message-ID:References:Injection-Date: Injection-Info:User-Agent:To:X-Milter:X-Greylist; b=j/RQ8aE3+PTO2VhZ8xhWxYt3KKibrIwVcWVA/lpUtD4CWcOzqBSJ1dGFHU670Feoe65dM1HtX1xlcVGXQVY5f3TT62DWM6oyR5IfX8TaAXaVPSUT4m48nGAI9zyMGNowLjhSjay+3SOmV1zkvbu0W69OlRzMBj+tPVBNIJmzng0= ARC-Authentication-Results: i=1; uucp.dinoex.org X-MDaemon-Deliver-To: Received: (from uucp@localhost) by uucp.dinoex.org (8.18.1/8.18.1/Submit) with UUCP id 528LI7rr034611 for freebsd-hackers@freebsd.org; Sat, 8 Mar 2025 22:18:07 +0100 (CET) (envelope-from li-fbsd@citylink.dinoex.sub.org) Received: from admn.intra.daemon.contact (localhost [127.0.0.1]) by admn.intra.daemon.contact (8.18.1/8.18.1) with ESMTPS id 528L9INS053942 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Sat, 8 Mar 2025 22:09:18 +0100 (CET) (envelope-from li-fbsd@citylink.dinoex.sub.org) Received: from intra.daemon.contact (news@localhost) by admn.intra.daemon.contact (8.18.1/8.18.1/Submit) with NNTP id 528L9Cqu053453 for freebsd-hackers@freebsd.org; Sat, 8 Mar 2025 22:09:12 +0100 (CET) (envelope-from li-fbsd@citylink.dinoex.sub.org) X-Authentication-Warning: admn.intra.daemon.contact: news set sender to li-fbsd@citylink.dinoex.sub.org using -f From: "Peter 'PMc' Much" X-Newsgroups: m2n.fbsd.hackers Subject: Re: What happen with vm.v_* on stable? Date: Sat, 8 Mar 2025 21:09:12 -0000 (UTC) Message-ID: References: <20250308191416.7252c32d@rimwks.local> Injection-Date: Sat, 8 Mar 2025 21:09:12 -0000 (UTC) Injection-Info: admn.intra.daemon.contact; logging-data="43387"; mail-complaints-to="usenet@citylink.dinoex.sub.org" User-Agent: slrn/1.0.3 (FreeBSD) To: freebsd-hackers@freebsd.org X-Milter: Spamilter (Reciever: uucp.dinoex.org; Sender-ip: 0:0:2a0b:f840::; Sender-helo: uucp.dinoex.org;) X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (uucp.dinoex.org [IPv6:2a0b:f840:0:0:0:0:0:12]); Sat, 08 Mar 2025 22:18:10 +0100 (CET) X-Spamd-Result: default: False [2.90 / 15.00]; SUBJECT_ENDS_QUESTION(1.00)[]; ARC_ALLOW(-1.00)[uucp.dinoex.org:s=M20221114:i=1]; NEURAL_SPAM_MEDIUM(1.00)[1.000]; NEURAL_SPAM_LONG(1.00)[1.000]; NEURAL_SPAM_SHORT(0.90)[0.901]; FORGED_SENDER(0.30)[pmc@citylink.dinoex.sub.org,li-fbsd@citylink.dinoex.sub.org]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; FROM_NEQ_ENVFROM(0.00)[pmc@citylink.dinoex.sub.org,li-fbsd@citylink.dinoex.sub.org]; RCVD_COUNT_THREE(0.00)[4]; ASN(0.00)[asn:205376, ipnet:2a0b:f840::/32, country:DE]; RCPT_COUNT_ONE(0.00)[1]; MIME_TRACE(0.00)[0:+]; TO_DN_NONE(0.00)[]; R_DKIM_NA(0.00)[]; HAS_XAW(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; RCVD_TLS_LAST(0.00)[]; FROM_HAS_DN(0.00)[]; DMARC_NA(0.00)[sub.org]; TO_MATCH_ENVRCPT_ALL(0.00)[] X-Rspamd-Queue-Id: 4Z9GH84wBqz3jK0 X-Spamd-Bar: ++ List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@FreeBSD.org On 2025-03-08, Rozhuk Ivan wrote: > Hi! > > "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target" sysctls describeb in i386 notes and some FBSD docs. > I try to tune it - see no effects. > I look into code of 14/STABLE and fail to find code that read these values. > > It seems it only show some initial on boot values and do nothink while OS work. Yes. I noticed that when upgrading from R.12 to R.13, my tunings on these values no longer work. The matter is probably related to this (but I don't think you can tune these easily - doing so would be somehow ambitioned anyway): admin@edge:515:1~$ sysctl vm.domain | egrep "free_(reserved|min|target)" vm.domain.3.stats.free_min: 25825 vm.domain.3.stats.free_reserved: 5388 vm.domain.3.stats.free_target: 87136 vm.domain.2.stats.free_min: 25827 vm.domain.2.stats.free_reserved: 5388 vm.domain.2.stats.free_target: 87144 vm.domain.1.stats.free_min: 25827 vm.domain.1.stats.free_reserved: 5388 vm.domain.1.stats.free_target: 87144 vm.domain.0.stats.free_min: 51281 vm.domain.0.stats.free_reserved: 10647 vm.domain.0.stats.free_target: 173183 Which brings me to another question: when a domain runs full, why does the system start to pageout instead of utilizing QPI? I for my part solved most of the problem by hacking ZFS UMA to do round-robin. UMA can perfectly do that, it's just not documented anywhere. But there is a patch suggestion from I think Mark Johnston? that does practically the same. cheerio, PMc