From owner-svn-src-all@FreeBSD.ORG Thu Apr 23 12:25:36 2015 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 176FABFF for ; Thu, 23 Apr 2015 12:25:36 +0000 (UTC) Received: from nm17-vm4.bullet.mail.gq1.yahoo.com (nm17-vm4.bullet.mail.gq1.yahoo.com [98.137.177.228]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id D922C15CE for ; Thu, 23 Apr 2015 12:25:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1429791551; bh=P/ucPUHh0dgHJKfDY3+oSMBpvM8D2PuwoYJ5/R2DSW4=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From:Subject; b=fphf/3hunUwhcrgE/gTxDPVRWCZZfJSfm8/rNUwp/8A0P7P6bPptK/gSluHu0hgUHQ9jk5VGAM0iL6SaF42HvqKqcCiHRODSzDCBh/m2oUrwz5PLOkzI87t+TphZdKtVlbYiLRdpm5iHrnQqDPsPQAkobTfQ66sOMan3tLDD4juCUbJYUpnolR1POLuVOj10WCpgOo7uyUnO0F2Rrnhulfvuw6tNx4QPixjcXT4YkxjPWpDQdBunofZ+ovR5mtO5aOV2Vo1Tfl6hS740IXUVN5zRlXufzjFEme8UJzmSd1YYHjCZIuObAJA/EsIGr0TJFNlwetxs3HxolqzxRMKkmA== Received: from [98.137.12.190] by nm17.bullet.mail.gq1.yahoo.com with NNFMP; 23 Apr 2015 12:19:11 -0000 Received: from [208.71.42.197] by tm11.bullet.mail.gq1.yahoo.com with NNFMP; 23 Apr 2015 12:19:11 -0000 Received: from [127.0.0.1] by smtp208.mail.gq1.yahoo.com with NNFMP; 23 Apr 2015 12:19:11 -0000 X-Yahoo-Newman-Id: 536258.72180.bm@smtp208.mail.gq1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: mzDE.yAVM1mb.QlFcdQgncUZTt3Mq3j0rmrnjp8fDV9GR1X wrfFohfa6ySPlrsmnYtM3bMiknS41KqXAVlRKyasIvE3M5j3GXbunltg6pTb owa_1gTAb9aTNtDuod0Wzcp8kSegluHVSsx1zzjzTGOY_u5NTBktDuFCCmqD IwqIycAh7mo0QC6n2w5VdTW29t.pQyGQuTlJazXDXmsPJYUAy0m4J88C.PyH 32bEgSd0yH_uNUyDqQZ0jlm6F1D5vFcZkVGmrx7Z289sgkRrKwIC98oOybz6 zRNC4wUeUf7vFJvlN8AaViEpCgN5TQcBvGLCZzIs8rvRzFr8FqoypzWXQMPD j63Y9Vifviai2DUKyuzg8J5UoE1qItKasYL6wvKvIaod2p7hH5Gv23kJ4sB1 OdppQDVrZnfhqNJxOrzhXorP.5IQXCxBaW.8798gnUk_joslJ4u398ZByqGE B_o.dVnNrwJ.2UItgH9hn.IGofhLZuxUZHKXQykj5yEuFoGeOAkbRQ4DPSOI q9m7kNyKKxZ6ghmqbhQcsnsr1XRDQRjqYpIkIAPS0 X-Yahoo-SMTP: clhABp.swBB7fs.LwIJpv3jkWgo2NU8- Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\)) Subject: Re: svn commit: r281451 - head/sys/vm From: Scott Long In-Reply-To: <201504120621.t3C6LxAV095209@svn.freebsd.org> Date: Thu, 23 Apr 2015 06:19:10 -0600 Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <5B48434B-EA97-45B3-BC4E-B039A868186B@yahoo.com> References: <201504120621.t3C6LxAV095209@svn.freebsd.org> To: Dmitry Chagin X-Mailer: Apple Mail (2.2070.6) X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Apr 2015 12:25:36 -0000 > On Apr 12, 2015, at 12:21 AM, Dmitry Chagin = wrote: >=20 > Author: dchagin > Date: Sun Apr 12 06:21:58 2015 > New Revision: 281451 > URL: https://svnweb.freebsd.org/changeset/base/281451 >=20 > Log: > Rework r281162. Indeed, the flexible array member is preferable here. >=20 > Suggested by: Justin T. Gibbs >=20 > MFC after: 3 days >=20 > Modified: > head/sys/vm/uma_core.c > head/sys/vm/uma_int.h There=E2=80=99s still something wrong with this. I have a machine with = 28 cores (56 with hyperthreading) and 256GB of RAM, and ever since you = committed r281162, it panics early in boot with a failed assertion. It = looks like the first few members of a uma_slab_t are getting overwritten = accidentally, and somehow the padding of the extra member in the = uma_zone_t was previously protecting it. I don=E2=80=99t know the exact = cause yet, but I must ask that you revert to r281161 in HEAD and = stable/10 until the problem is resolved. Thanks, Scott