From owner-freebsd-stable@freebsd.org Thu Mar 29 21:54:13 2018 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 41E7BF79939 for ; Thu, 29 Mar 2018 21:54:13 +0000 (UTC) (envelope-from jdc@koitsu.org) Received: from resqmta-po-04v.sys.comcast.net (resqmta-po-04v.sys.comcast.net [IPv6:2001:558:fe16:19:96:114:154:163]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "resqmta-po-01v.sys.comcast.net", Issuer "COMODO RSA Organization Validation Secure Server CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id D575686CD6 for ; Thu, 29 Mar 2018 21:54:12 +0000 (UTC) (envelope-from jdc@koitsu.org) Received: from resomta-po-01v.sys.comcast.net ([96.114.154.225]) by resqmta-po-04v.sys.comcast.net with ESMTP id 1fU7f4XpUiTCi1fUpfgIce; Thu, 29 Mar 2018 21:54:11 +0000 Received: from koitsu.org ([71.198.44.84]) by resomta-po-01v.sys.comcast.net with SMTP id 1fUof8IwaVIeT1fUofhvNI; Thu, 29 Mar 2018 21:54:11 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 3DDB81581F99; Thu, 29 Mar 2018 14:54:10 -0700 (PDT) Date: Thu, 29 Mar 2018 14:54:10 -0700 From: Jeremy Chadwick To: curtis@orleans.occnc.com Cc: freebsd-stable@freebsd.org Subject: Re: kern.maxswzone causing serious problems Message-ID: <20180329215410.GA60880@icarus.home.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) X-CMAE-Envelope: MS4wfMq0wjiRNSRGks93kHqNkJHEJTXe4gW3JarjnRvRbNz2XiT3gLwzm+kBqrUbzEPJ83h+BktJi1bwHN4xL7nEbv6UyNxy1q+8YoLIftDxceGEob1Ky4sS WB+hrfs4sukkRrf1Vffu/pK/vHixwt0x8EofUOLIHTIJcTcrdoXG8Tjfg7q8C7ededsSfQqwD+y2LdGQuWP+Oysc/ecIedsaFaU= X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Mar 2018 21:54:13 -0000 I am not subscribed to -stable, so please keep me CC'd. I mailed -stable about this problem, or a variation of it, earlier this month: https://lists.freebsd.org/pipermail/freebsd-stable/2018-March/088467.html What isn't publicly visible is the list of individuals I CC'd on that mail who had touched this code in recent days: kib@freebsd.org, des@freebsd.org, pluknet@freebsd.org, eadler@freebsd.org I received no response from them on this matter. At least two, however, have been extremely busy commit-wise, so I imagine folks are just swamped right now + have higher priorities. I did not read or review your {naiveanalysis} section or your patch, as tinkering with VM design/internals is *way* outside my comfort zone. I will say that printing the sizes in a unit other than pages would be generally helpful; I did try to figure out what value to use for kern.maxswzone as a workaround by digging through kernel code but gave up, as I wasn't able to truly determine what "pages" actually represented (size-wise) in this specific context. I hope someone with src commit bit will comment, as code slush for 11.2-RELEASE begins on April 20th: https://www.freebsd.org/releases/11.2R/schedule.html Else a separate PR can be opened if requested. -- | Jeremy Chadwick jdc@koitsu.org | | UNIX Systems Administrator http://jdc.koitsu.org/ | | Making life hard for others since 1977. PGP 4BD6C0CB |