From owner-freebsd-stable@freebsd.org Sat Oct 15 16:21:37 2016 Return-Path: Delivered-To: freebsd-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 76309C13693 for ; Sat, 15 Oct 2016 16:21:37 +0000 (UTC) (envelope-from karl@denninger.net) Received: from mail.denninger.net (denninger.net [70.169.168.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 35164E0B for ; Sat, 15 Oct 2016 16:21:36 +0000 (UTC) (envelope-from karl@denninger.net) Received: from [192.168.1.40] (Karl-Desktop.Denninger.net [192.168.1.40]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.denninger.net (Postfix) with ESMTPSA id F363D302E66 for ; Sat, 15 Oct 2016 11:12:31 -0500 (CDT) To: freebsd-stable@freebsd.org From: Karl Denninger Subject: Errata notice for 11.0 -- question Message-ID: <2b381f8e-e47e-9806-91d1-872cf6372c78@denninger.net> Date: Sat, 15 Oct 2016 11:12:31 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms050401080207000005090104" X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 15 Oct 2016 16:21:37 -0000 This is a cryptographically signed message in MIME format. --------------ms050401080207000005090104 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable I noted this /after /svn updating my 11.x box to the most-current -STABLE= : A bug was diagnosed in interaction of the |pmap_activate()| function and TLB shootdownIPI handler on amd64 systems which have PCID features but do not implement theINVPCID instruction. On such machines, such as SandyBridge=E2=84=A2 and IvyBridge=E2=84=A2 microarchitectures, set the loader tunable |vm.pmap.pcid_enabled=3D0| during boot: set vm.pmap.pcid_enabled=3D0 boot Add this line to |/boot/loader.conf| for the change to persist across reboots: To check if the system is affected, check dmesg(8) for PCID listed in the "Features2", and absence of INVPCID in the "Structured Extended Features". If the PCID feature is not present, or INVPCID is present, system is not affected. Well, I'm allegedly subject to this: Copyright (c) 1992-2016 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved.= FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 11.0-STABLE #13 r307318M: Fri Oct 14 09:23:46 CDT 2016 karl@NewFS.denninger.net:/usr/obj/usr/src/sys/KSD-SMP amd64 FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM 3.8.0) VT(vga): text 80x25 CPU: Intel(R) Xeon(R) CPU E5620 @ 2.40GHz (2400.13-MHz K8-class CPU) Origin=3D"GenuineIntel" Id=3D0x206c2 Family=3D0x6 Model=3D0x2c Step= ping=3D2 =20 Features=3D0xbfebfbff =20 Features2=3D0x29ee3ff AMD Features=3D0x2c100800 AMD Features2=3D0x1 VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID TSC: P-state invariant, performance statistics And I do _*not*_ have it turned off at this moment. vm.pmap.invpcid_works: 0 vm.pmap.pcid_enabled: 1 But.... I've also yet to see any sort of misbehavior. So the questions are: 1. What's the misbehavior I should expect to see if this is not shut off (and it isn't)? 2. Should I take this machine down immediately to reboot it with vm.pmap.pcid_enabled=3D0 in /boot/loader.conf? A svn log perusal didn't see anything post the errata date that appears to be related.... which makes me wonder. Thanks in advance! --=20 Karl Denninger karl@denninger.net /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms050401080207000005090104 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC Bl8wggZbMIIEQ6ADAgECAgEpMA0GCSqGSIb3DQEBCwUAMIGQMQswCQYDVQQGEwJVUzEQMA4G A1UECBMHRmxvcmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3Rl bXMgTExDMRwwGgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhND dWRhIFN5c3RlbXMgTExDIENBMB4XDTE1MDQyMTAyMjE1OVoXDTIwMDQxOTAyMjE1OVowWjEL MAkGA1UEBhMCVVMxEDAOBgNVBAgTB0Zsb3JpZGExGTAXBgNVBAoTEEN1ZGEgU3lzdGVtcyBM TEMxHjAcBgNVBAMTFUthcmwgRGVubmluZ2VyIChPQ1NQKTCCAiIwDQYJKoZIhvcNAQEBBQAD ggIPADCCAgoCggIBALmEWPhAdphrWd4K5VTvE5pxL3blRQPyGF3ApjUjgtavqU1Y8pbI3Byg XDj2/Uz9Si8XVj/kNbKEjkRh5SsNvx3Fc0oQ1uVjyCq7zC/kctF7yLzQbvWnU4grAPZ3IuAp 3/fFxIVaXpxEdKmyZAVDhk9az+IgHH43rdJRIMzxJ5vqQMb+n2EjadVqiGPbtG9aZEImlq7f IYDTnKyToi23PAnkPwwT+q1IkI2DTvf2jzWrhLR5DTX0fUYC0nxlHWbjgpiapyJWtR7K2YQO aevQb/3vN9gSojT2h+cBem7QIj6U69rEYcEDvPyCMXEV9VcXdcmW42LSRsPvZcBHFkWAJqMZ Myiz4kumaP+s+cIDaXitR/szoqDKGSHM4CPAZV9Yh8asvxQL5uDxz5wvLPgS5yS8K/o7zDR5 vNkMCyfYQuR6PAJxVOk5Arqvj9lfP3JSVapwbr01CoWDBkpuJlKfpQIEeC/pcCBKknllbMYq yHBO2TipLyO5Ocd1nhN/nOsO+C+j31lQHfOMRZaPQykXVPWG5BbhWT7ttX4vy5hOW6yJgeT/ o3apynlp1cEavkQRS8uJHoQszF6KIrQMID/JfySWvVQ4ksnfzwB2lRomrdrwnQ4eG/HBS+0l eozwOJNDIBlAP+hLe8A5oWZgooIIK/SulUAsfI6Sgd8dTZTTYmlhAgMBAAGjgfQwgfEwNwYI KwYBBQUHAQEEKzApMCcGCCsGAQUFBzABhhtodHRwOi8vY3VkYXN5c3RlbXMubmV0Ojg4ODgw CQYDVR0TBAIwADARBglghkgBhvhCAQEEBAMCBaAwCwYDVR0PBAQDAgXgMCwGCWCGSAGG+EIB DQQfFh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4EFgQUxRyULenJaFwX RtT79aNmIB/u5VkwHwYDVR0jBBgwFoAUJHGbnYV9/N3dvbDKkpQDofrTbTUwHQYDVR0RBBYw FIESa2FybEBkZW5uaW5nZXIubmV0MA0GCSqGSIb3DQEBCwUAA4ICAQBPf3cYtmKowmGIYsm6 eBinJu7QVWvxi1vqnBz3KE+HapqoIZS8/PolB/hwiY0UAE1RsjBJ7yEjihVRwummSBvkoOyf G30uPn4yg4vbJkR9lTz8d21fPshWETa6DBh2jx2Qf13LZpr3Pj2fTtlu6xMYKzg7cSDgd2bO sJGH/rcvva9Spkx5Vfq0RyOrYph9boshRN3D4tbWgBAcX9POdXCVfJONDxhfBuPHsJ6vEmPb An+XL5Yl26XYFPiODQ+Qbk44Ot1kt9s7oS3dVUrh92Qv0G3J3DF+Vt6C15nED+f+bk4gScu+ JHT7RjEmfa18GT8DcT//D1zEke1Ymhb41JH+GyZchDRWtjxsS5OBFMzrju7d264zJUFtX7iJ 3xvpKN7VcZKNtB6dLShj3v/XDsQVQWXmR/1YKWZ93C3LpRs2Y5nYdn6gEOpL/WfQFThtfnat HNc7fNs5vjotaYpBl5H8+VCautKbGOs219uQbhGZLYTv6okuKcY8W+4EJEtK0xB08vqr9Jd0 FS9MGjQE++GWo+5eQxFt6nUENHbVYnsr6bYPQsZH0CRNycgTG9MwY/UIXOf4W034UpR82TBG 1LiMsYfb8ahQJhs3wdf1nzipIjRwoZKT1vGXh/cj3gwSr64GfenURBxaFZA5O1acOZUjPrRT n3ci4McYW/0WVVA3lDGCBRMwggUPAgEBMIGWMIGQMQswCQYDVQQGEwJVUzEQMA4GA1UECBMH RmxvcmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3RlbXMgTExD MRwwGgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhNDdWRhIFN5 c3RlbXMgTExDIENBAgEpMA0GCWCGSAFlAwQCAwUAoIICTTAYBgkqhkiG9w0BCQMxCwYJKoZI hvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xNjEwMTUxNjEyMzFaME8GCSqGSIb3DQEJBDFCBEBX WccYvSZORgAOZBsSlX6YIxEcQV0Wicv2z1oAzZLfe/TE72AeEtUFuYalNXD01/MAKkvaOIdf Q41uzSIsAWB0MGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEqMAsGCWCGSAFlAwQBAjAK BggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwICAUAwBwYFKw4DAgcwDQYI KoZIhvcNAwICASgwgacGCSsGAQQBgjcQBDGBmTCBljCBkDELMAkGA1UEBhMCVVMxEDAOBgNV BAgTB0Zsb3JpZGExEjAQBgNVBAcTCU5pY2V2aWxsZTEZMBcGA1UEChMQQ3VkYSBTeXN0ZW1z IExMQzEcMBoGA1UEAxMTQ3VkYSBTeXN0ZW1zIExMQyBDQTEiMCAGCSqGSIb3DQEJARYTQ3Vk YSBTeXN0ZW1zIExMQyBDQQIBKTCBqQYLKoZIhvcNAQkQAgsxgZmggZYwgZAxCzAJBgNVBAYT AlVTMRAwDgYDVQQIEwdGbG9yaWRhMRIwEAYDVQQHEwlOaWNldmlsbGUxGTAXBgNVBAoTEEN1 ZGEgU3lzdGVtcyBMTEMxHDAaBgNVBAMTE0N1ZGEgU3lzdGVtcyBMTEMgQ0ExIjAgBgkqhkiG 9w0BCQEWE0N1ZGEgU3lzdGVtcyBMTEMgQ0ECASkwDQYJKoZIhvcNAQEBBQAEggIAHpQEtFSZ JTUkJaBN7cRMsaYxphGtCqn6USOpfsOxvZZpQVT2QUTiMO0ORyxkBPM7bXd0gcHdLObK/PqY RXL98A0znXH6qSZ47IfgZx9p6bo8oPB+Sz8/Nw+YqU5Ox4XwYn/7i6gqDc0YVbZs7ncoX+0J nD4OVABhZnwNOnogk7bsg4HWMIofeB6Z6cSAGInaM5zzxgKWkE65ivl/zMn8ZW1Mubbry1EK pg0wTJWsdUPMDGzWdnqWCsBJDYuAZ8JY3em2nHUhmaXJS3UCDwQHhAefyEoEhzYNFTnmwjiV QNH2KgCEBqPBcprh6Fra+3HZBUXnRJl+C29dZPyVl49kRp25gEPy6Bfr5qaOb0122JkW8m6C di+/gMoeswOz/RLW5sDUQNjzIWj0AF6H+MyQcyyytpTtgBmmJJEdvQ2czVBzLkrfB86rwiTK NvKTJgx5Aqep5mh1l50RzJ0PV3E4HEVEffCIxKbj1cW/SV224u8rQSjBJNz6G0DcFpTeLPoq KZUQuIfqx3C0GJzIlkwODyc6vpxpjw37+k8vksRUqF2g2EFJx5ft4+59voUDdjdH4vCXwztH vzfAtlkVTTuyyP6bb5TtMtIDOvRYHmoltKwWGOC8mr4XGxCffln9EbvrsFqGA+hlMio5yiCU gD8v9mbvgVCxZMpL4X583eEqKMYAAAAAAAA= --------------ms050401080207000005090104--