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[209.132.180.67]) by mx.google.com with ESMTP id 71si10842704pfx.376.2018.01.20.01.07.46; Sat, 20 Jan 2018 01:08:32 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=twosheds.20170209 header.b=qUbgay78; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754950AbeATJDe (ORCPT + 99 others); Sat, 20 Jan 2018 04:03:34 -0500 Received: from twosheds.infradead.org ([90.155.92.209]:51066 "EHLO twosheds.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751063AbeATJDY (ORCPT ); Sat, 20 Jan 2018 04:03:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=twosheds.20170209; h=Mime-Version:Date:Content-Type: References:In-Reply-To:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=IKvNqSV3N31LUHA8QiApiO4lBOCm+BAhbkGrzdOEdwI=; b=qUbgay786Ys2IN+u6mLuJMwk8 bktCxyqUEciiEEA0c8nVyGKTJc7i9sF3ICN0PI7n5LyaJ8BDs7HE8LQUzojrYmS4IwvDTkV3lQOr0 37qRtNDke/EyeVSekPIhSJb0y0wuH1peAjI07o3GM/hXjA0ZAMbN3lOv6qXlozcH46Jj6XLvFBgMK Bv9s3SS6OuKMtumw7hkERYqVbYuSnMNvn86G8usUYo6SVNJqAWAqYFk1wjRn91XugKcDrkBhzDXMk VRlCoiWru984p6rVvPwmyMjsc0ABRdTuPDRVY0y5b9X98ZA/5E1HMHRYRhQTHklP6ba/mr9lJdcZV JYWAP8OSg==; Received: from [54.239.6.185] (helo=freeip.amazon.com) by twosheds.infradead.org with esmtpsa (Exim 4.89 #1 (Red Hat Linux)) id 1ecp3K-0004mh-LX; Sat, 20 Jan 2018 09:03:11 +0000 Message-ID: <1516438985.5087.71.camel@infradead.org> Subject: Re: [RH72 Spectre] ibpb_enabled = 1 leads to hard LOCKUP under x86_64 host machine From: David Woodhouse To: Hou Tao , aarcange@redhat.com, linux-kernel@vger.kernel.org, "arjan.van.de.ven@intel.com" Cc: mingo@redhat.com, Thomas Gleixner , ak@linux.intel.com, dave.hansen@linux.intel.com, peterz@infradead.org, qiuxishi@huawei.com, wangkefeng.wang@huawei.com In-Reply-To: <12e55119-4f5b-da63-2b1c-14fb70243b21@huawei.com> References: <12e55119-4f5b-da63-2b1c-14fb70243b21@huawei.com> Face: 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 Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-L7AVKD8/GPfJ5r2xU6eL" Date: Sat, 20 Jan 2018 10:03:05 +0100 Mime-Version: 1.0 X-Mailer: Evolution 3.18.5.2-0ubuntu3.2 X-SRS-Rewrite: SMTP reverse-path rewritten from by twosheds.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-L7AVKD8/GPfJ5r2xU6eL Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, 2018-01-20 at 17:00 +0800, Hou Tao wrote: >=20 > So has anyone encountered a similar problem before, and any suggestions > and directions for the hard LOCKUP problems ? Arjan, what is the Intel recommendation here? --=-L7AVKD8/GPfJ5r2xU6eL Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEFQw ggUxMIIEGaADAgECAhBNRhEyk/HZ7naOeTHWrzuAMA0GCSqGSIb3DQEBCwUAMIGXMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYD VQQKExFDT01PRE8gQ0EgTGltaXRlZDE9MDsGA1UEAxM0Q09NT0RPIFJTQSBDbGllbnQgQXV0aGVu dGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQTAeFw0xNzEyMjEwMDAwMDBaFw0xODEyMjEyMzU5 NTlaMCQxIjAgBgkqhkiG9w0BCQEWE2R3bXcyQGluZnJhZGVhZC5vcmcwggEiMA0GCSqGSIb3DQEB AQUAA4IBDwAwggEKAoIBAQDgzLNWa18DNpGUj/ZeH0Sgz53ESIbzdPw3OJeuNP6jZhxZojbyfxbM hETscxI/Hj6UZ4a7sHm5BkVjlsB1Af2Za/PXUt8MmLAcPMHkMPGunvkUibEvblDvpqMkQZlaZM+t 5PqFmWkbehLaEvbpNY7dmEAAeKh4klTzJzrr5AAzaCQ32cA2e3+DEIv5O5l9ViMIjy/JM+xMQrfX 3PZ0chY1PaVWjg59d4Uno+5LRDbgCnPkKJX4ysBGadibjBGQGJEZCjh94iiEebn2KsRLvtrJ72Ph 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