From owner-svn-src-stable@freebsd.org Wed Dec 20 18:56:10 2017 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 96BA9E9CD57; Wed, 20 Dec 2017 18:56:10 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from vps.rulingia.com (vps.rulingia.com [103.243.244.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.rulingia.com", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2BD857BE04; Wed, 20 Dec 2017 18:56:09 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from server.rulingia.com (ppp59-167-167-3.static.internode.on.net [59.167.167.3]) by vps.rulingia.com (8.15.2/8.15.2) with ESMTPS id vBKIu2Ie093702 (version=TLSv1.2 cipher=DHE-RSA-CHACHA20-POLY1305 bits=256 verify=OK); Thu, 21 Dec 2017 05:56:07 +1100 (AEDT) (envelope-from peter@rulingia.com) X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.15.2/8.15.2) with ESMTPS id vBKItuOC013333 (version=TLSv1.2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256 verify=NO); Thu, 21 Dec 2017 05:55:56 +1100 (AEDT) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.15.2/8.15.2/Submit) id vBKItuCV013332; Thu, 21 Dec 2017 05:55:56 +1100 (AEDT) (envelope-from peter) Date: Thu, 21 Dec 2017 05:55:56 +1100 From: Peter Jeremy To: Baptiste Daroussin Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: Re: svn commit: r326619 - stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <20171220185556.GB5042@server.rulingia.com> References: <201712061001.vB6A12Ot032201@repo.freebsd.org> <20171213185214.GA12026@server.rulingia.com> <20171219141538.f7o2ujntckaguhq2@ivaldir.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="3lcZGd9BuhuYXNfi" Content-Disposition: inline In-Reply-To: <20171219141538.f7o2ujntckaguhq2@ivaldir.net> X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.9.1 (2017-09-22) X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Dec 2017 18:56:10 -0000 --3lcZGd9BuhuYXNfi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2017-Dec-19 15:15:38 +0100, Baptiste Daroussin wrote: >On Thu, Dec 14, 2017 at 05:52:15AM +1100, Peter Jeremy wrote: >> On 2017-Dec-06 10:01:02 +0000, Baptiste Daroussin wro= te: >> >Author: bapt >> >Date: Wed Dec 6 10:01:02 2017 >> >New Revision: 326619 >> >URL: https://svnweb.freebsd.org/changeset/base/326619 >> > >> >Log: >> > MFC r325851: >> > =20 >> > remove the poor emulation of the IllumOS needfree global variable to = prevent >> > the ARC reclaim thread running longer than needed. >> > =20 >>=20 >> This change appears to break the backpressure mechanism that forces >> ARC to release wired memory. Running FreeBSD/amd64 r326743, I found >> that my system was thrashing badly with almost all memory (~31GB out >> of 32GB) wired (including 19GB ARC, 7GB VBox guests). Running a tool >> that just allocates and dirties a large amount of memory had no effect >> on the ARC size. Reverting this change only restores normal behaviour >> where ARC will shrink under pressure. >>=20 >> My ZFS boot tunables are: >> vfs.zfs.arc_max=3D"24G" >> vfs.zfs.arc_meta_limit=3D"12G" >>=20 > >You are running an issue on head? or on stable/11? Given you are reporting= the >issue on the MFC commit I'm running into the problem on stable/11. Sorry for not making that clear. --=20 Peter Jeremy --3lcZGd9BuhuYXNfi Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQJ8BAEBCgBmBQJaOrI8XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRFRUIyOTg2QzMwNjcxRTc0RTY1QzIyN0Ux NkE1OTdBMEU0QTIwQjM0AAoJEBall6Dkogs0SBgP/0QeT0gCgBGguJyeDjFsMkIz eMYBxLynUkDYMQPLwzdHIOAsHOEYLdz3ghq3SeXZg/QFv11fFNsiKUvS/GAx6Xye YrL59imyOucjNMYqFZ6GEKlExBGp7Cnshis7LMNc6DdvKeDxiabHckrEYwEybaNy a38IPqmqc2s7gbtN+p/H6OsqVlVnOhd0oENPsFwiso8pHMaRlD89cqyHSC7+k5F3 Bzr1/b1Aao/WmlHrNLBP8Z52jG5YJ0yiSYTAsFHqG5TkPms9x/EgDkt2PRw2I0ny SPI6DDHZSX+hG00zw5u9HWNN2mnUvgyKgUB1XptZWcK47vVBQFggb6uETM2/UaZp MBmtwbLUheSCrEKEciVL6Sr8PZLcCDHuttP6Jw2APZZXhK2UcAFUhM0X7koAO0Kk bUmF2oLSUPFjtizQpfOutWE0MsSwfcmAYoHD5REhXhPKeEF6i/B2be6G7gTfB0t9 7jpQLlM/LBjy+KB7bRF/mliASWKIu7F658cBGgSzW28yX7/4wiBr8YnzmCIPLgVP 7mnbatcVbdhKQnoOZe01isDGah/7uuiH1janIEKTSjZYTsW9r/bRb3Fb6le0w1Be qcYtGTnH48ZrEfu8cGmoxOivWvRrjKnyBYjju9OSVUUjZDVBd8x5LVKxPQyi8pIH kRc+khIsxhAcQvYAUvQD =QTeW -----END PGP SIGNATURE----- --3lcZGd9BuhuYXNfi--