From owner-freebsd-arch@freebsd.org Sat Nov 14 04:14:11 2020 Return-Path: Delivered-To: freebsd-arch@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id CF80A2D4F36 for ; Sat, 14 Nov 2020 04:14:11 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-ot1-x334.google.com (mail-ot1-x334.google.com [IPv6:2607:f8b0:4864:20::334]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CY25t2G0gz3wKN for ; Sat, 14 Nov 2020 04:14:10 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: by mail-ot1-x334.google.com with SMTP id f16so10834688otl.11 for ; Fri, 13 Nov 2020 20:14:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:to:from:subject:autocrypt:cc:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=YRDCpEZkZ1ytb6HGL8rmE605MH0kJjiSb/URoGQ/V3U=; b=RgWM26pLSnPInOeiymPF+dBrVZjWAWXHZWAugXS/6RseItHHCqFtCuThqF3MFPjo9U s8iLVnifkb7M7aFEBU9LOMlUOQlDach27GaT5FLX2fQq449o5gudaDZ3Uz3kJNzLtP+n O3904xjt/HMU6Fk7IcGw1P7d4cCxfInhnmSLblmbLtfyqwAefWRDS1JIroSdbR7BvXTT MiObAcFXxxq4aZpLBgip4frFSOZ3YVMnO7ogvZx23pa9liqm/jQWLmjM78+q8neskpbt q76fdthBaIO8pEVR6RD4hEn1yA8AECR5+Z/IioN9cyWVMLGqJlSnlrKUXbvhO3mMBBiK SZ8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:to:from:subject:autocrypt:cc:message-id :date:user-agent:mime-version:content-language :content-transfer-encoding; bh=YRDCpEZkZ1ytb6HGL8rmE605MH0kJjiSb/URoGQ/V3U=; b=RI71QY1M4xA2uIYiY7RJp1h5t1hivdo8+cagn1JjOp/uHjCI1ZWdLH9a2Rc7qEvzKz hRhnudK7FIu37LP1NG4jqShwguR2zc3PlINjzKGHSoFPvmhtooMycmt1SNt3gN2zwPqV dEXqfljBUM/2K9HIMC65nU4VRvahAQwQsXJlOXoGtA9/l5RIdEmGt5clJmq6Po4KEhEt FP/Hj3VO6brSrY2b6hoO1tYvyfd1s75qzNBWI+QYyogDWDFmVp5krMb/v0IFTceH6vI2 EYd7HNaLGN9vFFGMvQYmP2X+d70tG14ER+NQUpToIt/X6IM8H4sIGpDwR3nvYrhrOH+C UWXQ== X-Gm-Message-State: AOAM533JrV5VAsFXOYciIQEQRDh4nHUlJiUw7/DtwjTy1SjA/s5+1tIq YEGGUesGJa2Yq6KWN53gW2CEqMfhX4dGrQ== X-Google-Smtp-Source: ABdhPJyikHhVK23zYriuHJ46KPC2zNV/2tNMxJS5eprmfYnl3ceI0mX7CQZvrun5BvrKtB/o3V3T1g== X-Received: by 2002:a9d:192d:: with SMTP id j45mr3665994ota.207.1605327248970; Fri, 13 Nov 2020 20:14:08 -0800 (PST) Received: from spectre.mavhome.dp.ua ([2600:1700:3580:3560:228:f8ff:fe04:d12]) by smtp.gmail.com with ESMTPSA id n26sm2609323oop.18.2020.11.13.20.14.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 13 Nov 2020 20:14:08 -0800 (PST) Sender: Alexander Motin To: "freebsd-arch@freebsd.org" From: Alexander Motin Subject: Re: MAXPHYS bump for FreeBSD 13 Autocrypt: addr=mav@FreeBSD.org; prefer-encrypt=mutual; keydata= mQENBFOzxAwBCADkPrax0pI2W/ig0CK9nRJJwsHitAGEZ2HZiFEuti+6/4UVxj81yr4ak/4g 9bKUyC7rMEAp/ZHNhd+MFCPAAcHPvtovnfykqE/vuosCS3wlSLloix2iKVLks0CwbLHGAyne 46lTQW74Xl/33c3W1Z6d8jD9gVFT/xaVzZ0U9xdzOmsYAZaAj4ki0tuxO9F7L+ct9grRe7iP g8t9hai7BL4ee3VRwk2JXnKb7UvBiVITKYWKz1jRvZIrjPokgEcCLOSlv7x/1kjuFnj3xWZU 7HSFFT8J93epBbrSSCsYsppIk2fZH41kaaFXsMQfTPH8wkeM6qwrvOh4HiQM08R+9tThABEB AAG0IUFsZXhhbmRlciBNb3RpbiA8bWF2QEZyZWVCU0Qub3JnPokBVwQTAQoAQQIbAwULCQgH AwUVCgkICwUWAwIBAAIeAQIXgAIZARYhBOmM88TmnMPNDledVYMYw5VbqyJ/BQJZYMKuBQkN McyiAAoJEIMYw5VbqyJ/tuUIAOG3ONOSNYqjK4eTZ1TVh9jdUBAhWk5nhDFnODN49Wj0AbYm 7aIqy8O1hnCDSZG5LttjSAo3UfXJZDKQM0BLb0gpRMBnAYqO6tdolLNqAbPGJBnGoPjsh24y 6KcbDaNnis+lD4GwPXwQM+92wZGhCUFElPV9NciZGVS65TNIgk7X+yEjjhD1MSWKKijZ1r9Z zIt4OzUTxxNOvzdlABZS88nNRdJkatOQJPmFdd1mpP6UzTNCiLUo1pIqOEtJgvVVDYq5WHY6 tciWWYdmZG/tIBexJmv2mV2OLVjXR6ZeKmntVH14H72/wRHJuYHQC+r5SVRcWWayrThsY6jZ Yr4+raS5AQ0EU7PEDAEIAOZgWf2cJIu+58IzP2dkXE/urj3tr4OqrB/yHGWUf71Lz6D0Fi6Z AXgDtmcFLGPfMyWuLAvSM+xmoguk7zC4hRBYvQycmIhuqBq1jO1Wp/Z+lpoPM/1cDYLn8Flv mI/c40MhUZh345DA4jYWWaZNjQHUWVQ1fPf595vdVVMPT/abE8E5DaF6fSkRmqFTmfYRkfbt 3ytU8NdUapDcJVY7cEP2nJBVNZPnOIObR/ZIgSxjjrG5o34yXoqeup8JvwEv+/NylzzuyXEZ R1EdEIzQ/a1nh/0j4NXtzZEqKW4aTWlmSqb6wN8jh1OSOOqkYsfnE3nfxcZbxi4IRoNQYlm5 9R8AEQEAAYkBPAQYAQoAJgIbDBYhBOmM88TmnMPNDledVYMYw5VbqyJ/BQJZYMLYBQkNMczM AAoJEIMYw5VbqyJ/TqgH/RQHClkvecE0262lwKoP/m0Mh4I5TLRgoJJn8S7G1BnqohYJkiLq A6xe6urGD7OqdNAl12UbrjWbdJV+zvea3vJoM4MZuYiYrGaXWxzFXqWJcPwMU9sAh8MRghHu uC5vgPb45Tnftw9/+n0i8GfVhQhOqepUGdQg4NPcXviSkoAvig6pp9Lcxisn0groUQKt15Gc sS9YcQWg3j9Hnipc6Mu416HX98Fb113NHJqc2geTHLkRyuBFOoyIqB6N9GKjzOAIzxxsVdl9 TevwGsrp4M4/RFzWbSgsbOnbE7454lmuVZGfReEjnUm8RHp9Q2UWKXlp3exlZjvOp/uVEpCg lz65AQ0EU7PEDAEIAOZgWf2cJIu+58IzP2dkXE/urj3tr4OqrB/yHGWUf71Lz6D0Fi6ZAXgD tmcFLGPfMyWuLAvSM+xmoguk7zC4hRBYvQycmIhuqBq1jO1Wp/Z+lpoPM/1cDYLn8FlvmI/c 40MhUZh345DA4jYWWaZNjQHUWVQ1fPf595vdVVMPT/abE8E5DaF6fSkRmqFTmfYRkfbt3ytU 8NdUapDcJVY7cEP2nJBVNZPnOIObR/ZIgSxjjrG5o34yXoqeup8JvwEv+/NylzzuyXEZR1Ed EIzQ/a1nh/0j4NXtzZEqKW4aTWlmSqb6wN8jh1OSOOqkYsfnE3nfxcZbxi4IRoNQYlm59R8A EQEAAYkBPAQYAQoAJgIbDBYhBOmM88TmnMPNDledVYMYw5VbqyJ/BQJZYMLYBQkNMczMAAoJ EIMYw5VbqyJ/TqgH/RQHClkvecE0262lwKoP/m0Mh4I5TLRgoJJn8S7G1BnqohYJkiLqA6xe 6urGD7OqdNAl12UbrjWbdJV+zvea3vJoM4MZuYiYrGaXWxzFXqWJcPwMU9sAh8MRghHuuC5v gPb45Tnftw9/+n0i8GfVhQhOqepUGdQg4NPcXviSkoAvig6pp9Lcxisn0groUQKt15GcsS9Y cQWg3j9Hnipc6Mu416HX98Fb113NHJqc2geTHLkRyuBFOoyIqB6N9GKjzOAIzxxsVdl9Tevw Gsrp4M4/RFzWbSgsbOnbE7454lmuVZGfReEjnUm8RHp9Q2UWKXlp3exlZjvOp/uVEpCglz4= Message-ID: <1bff381f-3d6e-b20c-28f9-1403a9dfe0f6@FreeBSD.org> Date: Fri, 13 Nov 2020 23:14:07 -0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 4CY25t2G0gz3wKN X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=RgWM26pL; dmarc=none; spf=pass (mx1.freebsd.org: domain of mavbsd@gmail.com designates 2607:f8b0:4864:20::334 as permitted sender) smtp.mailfrom=mavbsd@gmail.com X-Spamd-Result: default: False [-0.20 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36:c]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; FORGED_SENDER(0.30)[mav@FreeBSD.org,mavbsd@gmail.com]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[2607:f8b0:4864:20::334:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MID_RHS_MATCH_FROM(0.00)[]; FROM_NEQ_ENVFROM(0.00)[mav@FreeBSD.org,mavbsd@gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; ARC_NA(0.00)[]; FAKE_REPLY(1.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; NEURAL_SPAM_SHORT(1.00)[1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-arch@freebsd.org]; DMARC_NA(0.00)[FreeBSD.org]; SPAMHAUS_ZRD(0.00)[2607:f8b0:4864:20::334:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::334:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-arch] X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Nov 2020 04:14:11 -0000 > We currently have a MAXPHYS of 128k. This is the maximum size of I/Os > that we normally use (though there are exceptions). > > I'd like to propose that we bump MAXPHYS to 1MB, as well as bumping > DFLTPHYS to 1MB. I am all for the MAXPHYS change, as Warner told it was my proposition on a chat. ZFS uses blocks and aggregates I/O up to 1MB already and can more potentially, and having I/O size lower then this just overflows disk queues, increases processing overheads, complicates scheduling and in some cases causes starvation. I'd just like to note that DFLTPHYS should probably not be changed that straight (if at all), since it is used as a fallback for legacy code. If it is used for anything else -- that should be reviewed and probably migrated to some other constant(s). -- Alexander Motin