From owner-freebsd-fs@freebsd.org Tue Aug 28 13:20:56 2018 Return-Path: Delivered-To: freebsd-fs@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 9FDC0108BFB3 for ; Tue, 28 Aug 2018 13:20:56 +0000 (UTC) (envelope-from killing@multiplay.co.uk) Received: from mail-ed1-x542.google.com (mail-ed1-x542.google.com [IPv6:2a00:1450:4864:20::542]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 1BE1E837EC for ; Tue, 28 Aug 2018 13:20:55 +0000 (UTC) (envelope-from killing@multiplay.co.uk) Received: by mail-ed1-x542.google.com with SMTP id s10-v6so1339805edb.11 for ; Tue, 28 Aug 2018 06:20:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=multiplay-co-uk.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language; bh=qYLBrg++T+fJV7XWGXyOYoMVhePvg7gYt2B0QruNvk8=; b=F8X0POkZMrmMzN/BI3/lGhmUVHDoFbLl3d1g6PJekJjFW+esTKnrdwUmE9XsdqAd9L HJwhB/pEWpgixmyqozaO3W1YMoztR0Q+72ryJ6OVtqCnb1c8ont3n3Dg4UvduQfjGRtY pAfzaZELn5qJFLJWgUO03uZnHmRolsRYPS/9rLDtdiN5k2azAhYQkGQLO9U+xO6AlMJZ C3EVEmBjNdtfJsdhvjQ9KZbArVPySQFm+aHIP1KvBeOpWt5H2NO/noRtCnaeDJXYyvDn f+QayU31agyhl3QT1TIlfkbrN7FX9VB0Fq7CUpt9oxHylTMlqVt3+QwpU1VkjxJZCVyB Oqkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language; bh=qYLBrg++T+fJV7XWGXyOYoMVhePvg7gYt2B0QruNvk8=; b=FNXwc8ZtHiVVu9O49ra0OiOBu+8ZT5INBzQEoUfoYCIXOY2t8Bq8qDQb+stdp3J+vB ArV9iH/xbYExyM+27Fd0p7N0oRvf68sc3uLRPjckF2qRY0RQfEcFexB/ILcKhZkSDtPE uGfIE8mdEJ1CCnw6U34Q5MfWJnZlXS9BA6/q05Pe7TYjUcruia2PvDZryZxbMFUbbBL8 VghTUG7oZP2v28xhBcvRYInNWk1JicsCI5Q/AKgbmfSGBSzS2aRrhASXzV+PsPya0I4j JB0neEKdaCwDnPgCFFAGwubNnVwogG8oNjbudufdo1whRM3HhbT2lpKWFlKcvI7c6e/C PVgQ== X-Gm-Message-State: APzg51D+6EZ+QiLjc22uCEF5vxIaNJWGdmRJtEcR7JGIkt+3EqBzT3Ge OOLdMWKsOXx+xPA1el4OoXCLJRBO9kI= X-Google-Smtp-Source: ANB0Vda9vGThVXxhKSzKdVetLUYQlU+7R9YUSC60qgu7cnewKmvCKiIwwnT7ISijKuMGUZimEtvKOA== X-Received: by 2002:a50:ab15:: with SMTP id s21-v6mr2465931edc.133.1535462454351; Tue, 28 Aug 2018 06:20:54 -0700 (PDT) Received: from [10.44.128.75] ([161.12.40.153]) by smtp.gmail.com with ESMTPSA id q24-v6sm568561edd.73.2018.08.28.06.20.53 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 28 Aug 2018 06:20:53 -0700 (PDT) Subject: Re: ZFS (ARC) performance regression in r321610 To: freebsd-fs@freebsd.org References: <20180827154727.80f92fff9bbc931b37928d43@yamagi.org> <3c6f8c96-6ac9-7257-c8c0-8be2063a7c19@FreeBSD.org> <20180827182723.cd8ec6bac6448793b25ef91c@yamagi.org> <20180828105048.d5a4133c8a932eff900bd758@yamagi.org> <20180828110543.7cc7fa65a0e04e29a06a32b1@yamagi.org> From: Steven Hartland Message-ID: <93ad65ca-e1d5-0275-b8c2-bc8a55e66e0c@multiplay.co.uk> Date: Tue, 28 Aug 2018 14:20:53 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.27 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Aug 2018 13:20:56 -0000 On 28/08/2018 14:10, Lev Serebryakov wrote: > On 28.08.2018 12:05, Yamagi Burmeister wrote: > > >>> ZFS on Linux exposes zfs_abd_scatter_enabled through a module >>> parameter. What about turning it into a sysctl? Something like this: >> Ups, there sneaked an unrelated edit into the patch. New version here: > I think, you need to create Phabricator review ("change") and push it > HARD, or patch will be lost and never go to sources :-( > I'll try and pick this up if no else gets to it first.     Regards     Steve