From owner-freebsd-stable@freebsd.org Sun Apr 8 18:41:46 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 477E8F989D3 for ; Sun, 8 Apr 2018 18:41:46 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from mailhost.m5p.com (mailhost.m5p.com [74.104.188.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B0C5E7592C for ; Sun, 8 Apr 2018 18:41:45 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from [IPv6:2001:470:1f07:15ff::1f] (haymarket.m5p.com [IPv6:2001:470:1f07:15ff::1f]) (authenticated bits=0) by mailhost.m5p.com (8.15.2/8.15.2) with ESMTPSA id w38IfFZK053936 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO) for ; Sun, 8 Apr 2018 14:41:25 -0400 (EDT) (envelope-from george+freebsd@m5p.com) Subject: Re: more data: SCHED_ULE+PREEMPTION is the problem To: freebsd-stable@freebsd.org References: From: George Mitchell Openpgp: preference=signencrypt Autocrypt: addr=george+freebsd@m5p.com; 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FreeBSD amd64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="kW0WoDviQ3YGLXY5AaB2ZSmzxu30KmbcX" X-Spam-Status: No, score=0.2 required=10.0 tests=HELO_MISC_IP, RP_MATCHES_RCVD autolearn=no autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on mattapan.m5p.com X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.6.2 (mailhost.m5p.com [IPv6:2001:470:1f07:15ff::f7]); Sun, 08 Apr 2018 14:41:26 -0400 (EDT) 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: Sun, 08 Apr 2018 18:41:46 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --kW0WoDviQ3YGLXY5AaB2ZSmzxu30KmbcX Content-Type: multipart/mixed; boundary="krxBEe0HaWVxSHcE02CbHjZa7hRDjJr8G"; protected-headers="v1" From: George Mitchell To: freebsd-stable@freebsd.org Message-ID: <3323e648-65a9-6270-3b0f-59064e4203de@m5p.com> Subject: Re: more data: SCHED_ULE+PREEMPTION is the problem References: In-Reply-To: --krxBEe0HaWVxSHcE02CbHjZa7hRDjJr8G Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 04/07/18 10:18, Peter wrote: > [...] > B. Findings: > ------------ > 1. Filesystem >=20 > I could never reproduce this when reading from plain UFS. Only when > reading from ZFS (direct or via l2arc). > [...] My consistent way of reproducing the problem was to run ports/misc/dnetc while trying to buildworld/buildkernel. But I was always building on a UFS partition. I don't know why your results would be different. -- George --krxBEe0HaWVxSHcE02CbHjZa7hRDjJr8G-- --kW0WoDviQ3YGLXY5AaB2ZSmzxu30KmbcX Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEENdM4ZHktsJW5kKZXwRES3m+p4fkFAlrKYksACgkQwRES3m+p 4fnfXg/+OFaYPZTEYieTUik19UoS5vYa6MJvfKtS7GbtH8ziwcX8hIKMgiQ/6ftB 8ACinBN7KFUFh2frSJAA54QPLqKwCmUAgyoQ+LqGoQl9lqPlOPTJp88k8S3YbU7W mgAuPz/86RHtA4mahkvKleTTIX6o9rSm5pW9RrvCNXjy28ACKYRFvMz7bIbIYaxn c3RUmRaUyfXhIhbtsMjw/XtBmuShxNhM9q19NLogtHb2pXl/KUbUQ1r0kkgw1oCq MlMzL/85Ul7bvGs1p+90kWssx6RgEKhPr1P9vkMCHKK9xnqoS/jzpEbe4uTnJb0J S0o4jqnmSJJVEgvWTAx888muAniNExTeS6mDZoF+f1UcDZqyjMpFN+0HQ7FP9J3a o534CLFF9rINylXUAAqTN1Qy4NF1lGIcj9c4CyL7Llx3ya4++OTpraXCuxjsObWt qoEsx18GpoMk5/bqoKqua5cqnFscbSrXEqNuBhL4uEgikQwj23Ay4IwXHdp0gMyJ JVF/9XLmg1rjmxYK3LMxXiwn8s9Bl8cv03ZtbDn3kOUqK1VV8OpgznzS8GWYrVlQ vBl8+gx1rSHaBIPwNheZmDyghv9BgfwMll5kQHjnbbZ6O4n1vf+5+FTflrJflanI k/gvi2fD6mJvPV1UQlYa5Wm6BSgus3WwT/nL6X+MsHplTqxy290= =NPwZ -----END PGP SIGNATURE----- --kW0WoDviQ3YGLXY5AaB2ZSmzxu30KmbcX--