Received: by 2002:ab2:6309:0:b0:1fb:d597:ff75 with SMTP id s9csp34361lqt; Wed, 5 Jun 2024 16:16:10 -0700 (PDT) X-Forwarded-Encrypted: i=3; AJvYcCX3YCSYr7M2ctMUhNRJBV67T6FMuZQ9bIju+K2t2sw8nefFQ2Sjq39pD/V5m2xUPaVMuNmSVz+4hWbOLGJqu3o0+R5k0eDYbtxgo8pDKg== X-Google-Smtp-Source: AGHT+IEy1n1IOzb0rO9HMa0e0+GMjBVAeBS985uGRVBKdP2Y2Hi/EL7ypJgF5kIxFMVelsfPe6hy X-Received: by 2002:a17:903:183:b0:1f4:b858:5fe7 with SMTP id d9443c01a7336-1f6a5a7af16mr46108855ad.61.1717629370642; Wed, 05 Jun 2024 16:16:10 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1717629370; cv=pass; d=google.com; s=arc-20160816; b=UmsL+wM9AVFh/RQwaAiPUOn0s75gzwojdVeDWzIR03Fv89uQlHOJnTifGqZwslKuU6 +O7N88OBTpqh1VctxLCvmPGmrLfqqHU/VIp41ATGf3cuoD/Mi7U8eON3jx2reyO1Th2I RzHsvsxFGyIDZMRe1js132Ily5P8EGE1otoZ4vIiH28Ju68jI7I/qLNC/ri5eFvF/UHC Pog+CxJfD9OJBahwlGBpPMLDFPOhmt9WnH6wvtqjZV74SBWtqyWig51uSAYR9GSvQE0b e7N9ZxPBMXq4/Djje5O3d7imYNol7OJlGCZWeeEHElABNGJiAtq6zxLvuA3MXC6iopOM 4fXg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:list-unsubscribe:list-subscribe:list-id:precedence :user-agent:content-transfer-encoding:organization:autocrypt :references:in-reply-to:date:cc:to:from:subject:message-id :dkim-signature; bh=Kw/ZGwacPfN6ZUbaVn20kczvR8Ku+fcQmm7JERInAVM=; fh=H3hn2lQE2zQkSyXGSHyvKogUW5c3GTR4xrNlJGc4XrM=; b=MA51T1j7tUoSVBCVxWUiPkYvPKHu8jaE0x/UcRVoFFqQMA7F9rbdRYs98CEQRO3NE0 EtTUD6Ym26x9ksXGEXpzIe3PDvdodPGBxbZ28LpiDpAHMaM7qGfP9WEIfBt2/mm+Owh9 A0Wlx5GZiOnNA25tITJIiXE9VO+oMTtheHtX3E5GHngm+6vtGt/IzJttQ95HbfHXP69n SQOP4Yq55E/h0tYaEoMQo1kAykFTEB6Uq9zcTOjRxS00TtUZedtwdzt/nmNrzj9eHpOq KX5d9rz2RsZG4/ZoeSdM3caYSMxPO4bbn28fkUJoiReEtwNtWsC68+zkyAEZ2pfv4Lr9 QF8A==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=MLaQugtD; arc=pass (i=1 spf=pass spfdomain=redhat.com dkim=pass dkdomain=redhat.com dmarc=pass fromdomain=redhat.com); spf=pass (google.com: domain of linux-kernel+bounces-203390-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-203390-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id d9443c01a7336-1f6bd76bba6si1303085ad.132.2024.06.05.16.16.10 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Jun 2024 16:16:10 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-203390-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=MLaQugtD; arc=pass (i=1 spf=pass spfdomain=redhat.com dkim=pass dkdomain=redhat.com dmarc=pass fromdomain=redhat.com); spf=pass (google.com: domain of linux-kernel+bounces-203390-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-203390-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 6F3A1281749 for ; Wed, 5 Jun 2024 23:16:09 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 65823160790; Wed, 5 Jun 2024 23:16:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="MLaQugtD" Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C1A7F146599 for ; Wed, 5 Jun 2024 23:16:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717629363; cv=none; b=ZjZfhbis+0omumZ3khvlJX4tzHfjhy7dAh/baLQgfaZlW0Rn5bnag374mV7i0xXC1aF+e+jPXJ8eqA9JRhlFd7e4+UHVGyff3oQbD5dGKohLMUCWBbOqn4/iAOvIdEw9P2oJzV0vEtmhjNsByZrJ1F0IyAZYyAnTUcxI5Lh6uyQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717629363; c=relaxed/simple; bh=Kw/ZGwacPfN6ZUbaVn20kczvR8Ku+fcQmm7JERInAVM=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=vBDiOQilI5lxKJTFJfT4s/004wv7KN5Ejo57XfI6KEZ4Q1NmSxdhBvdctFXoOgQ9nTx5mqes4W6qYBlrp+uJiN8fPDyl9RaQX3YZ1W2GBMYKRLk+Px2qeBRqABDHYSV4MmU/ag7D+UQLzz603DNAmFbWduEuqTR2UWZSRFpaWAw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=MLaQugtD; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1717629360; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=Kw/ZGwacPfN6ZUbaVn20kczvR8Ku+fcQmm7JERInAVM=; b=MLaQugtDBD2AC04gSEQzTPsMTtvTOlfuMBdHC/0zOJhQONLpRap5YtX5mFgk72nTaioSCw HUtohsVpocGfJWwIm88vRv1+QhQh61c+wPkGHFjQYhpiyx99H654yuwWNrqUMRcqcWys50 yJBXdNhTkukzuTygaMHm2apOx1BgbAM= Received: from mail-yw1-f198.google.com (mail-yw1-f198.google.com [209.85.128.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-518-UXbvcHbmMv6q2-ChKp08_A-1; Wed, 05 Jun 2024 19:15:59 -0400 X-MC-Unique: UXbvcHbmMv6q2-ChKp08_A-1 Received: by mail-yw1-f198.google.com with SMTP id 00721157ae682-62a080977a5so5175577b3.0 for ; Wed, 05 Jun 2024 16:15:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717629359; x=1718234159; h=mime-version:user-agent:content-transfer-encoding:organization :autocrypt:references:in-reply-to:date:cc:to:from:subject:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Kw/ZGwacPfN6ZUbaVn20kczvR8Ku+fcQmm7JERInAVM=; b=Hp5EPjOoWaX8kRfEDuFRS6IIUuyBGfYf+cBPiXYN2abKQXIuHlTu3UvcIMCxQQiYC6 In1uM2ipTEJ128o+cE7Um2uhH7jqexhCdM+IcPMjKRnEdU95EaDbSZYkwPRat9SVElrb mW5L48hTwb3eXWkbyp1rmLeIPh5BPe1SlrKXlLXJcN9dY+9kxAhvYKzF0QvTBF+D/i1b 3gAKR1Y13+bw2HEClmftcCqEKntpVA8iOD8bbFfL5jQRHc63m9CQ1CReZC7vWGCiVG4X nNl7q/igrB8C51tyoRTuuBVw2bb3TlpzCwbiVDW7UZKX81XkjWFI2xuPzQqYqSmTK3js x0qw== X-Forwarded-Encrypted: i=1; AJvYcCUE8kQImZTY5QHMwxw6Mp7DRZGfYtQz9Pk3uVvNYtUGEo+SDSfB49otp6vVrkXqB+AvNBnct74u3gn11La/Mw6wJC4bRWJdciScKHYs X-Gm-Message-State: AOJu0YyRRPeSa7w6CBjsQbnEgrmPXf9NUqPocyAHPE08NwJYaNNfAXmB eAcyraL/9zliQ4C0n6GG/6tKYQq2vdUUsy7cXe6ZS5Xh5BxHS5rbC1ZoPb1sWvc0G4yAiRloQW2 5K01YNBeIs1xo9PIwupJGvnH/IcV9XBkTYRBX4KtYK1qX/uSoMVVPRevUhDm75Q== X-Received: by 2002:a81:92c2:0:b0:615:1294:d6b6 with SMTP id 00721157ae682-62cbb48d5cdmr41236927b3.9.1717629358987; Wed, 05 Jun 2024 16:15:58 -0700 (PDT) X-Received: by 2002:a81:92c2:0:b0:615:1294:d6b6 with SMTP id 00721157ae682-62cbb48d5cdmr41236607b3.9.1717629358428; Wed, 05 Jun 2024 16:15:58 -0700 (PDT) Received: from ?IPv6:2600:4040:5c4c:a000:270f:2a70:881d:60b9? ([2600:4040:5c4c:a000:270f:2a70:881d:60b9]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6b04f718fb7sm539206d6.62.2024.06.05.16.15.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Jun 2024 16:15:57 -0700 (PDT) Message-ID: Subject: Re: Early boot regression from f0551af0213 ("x86/topology: Ignore non-present APIC IDs in a present package") From: Lyude Paul To: Thomas Gleixner , "Linux regression tracking (Thorsten Leemhuis)" Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Mario Limonciello , Borislav Petkov , Linux kernel regressions list Date: Wed, 05 Jun 2024 19:15:44 -0400 In-Reply-To: <87ttiha77b.ffs@tglx> References: <3d77cb89857ee43a9c31249f4eab7196013bc4b4.camel@redhat.com> <87le59vw1y.ffs@tglx> <3a0afe545747e5314a9cb6bbaa9ce90b259ddfac.camel@redhat.com> <87edautcmz.ffs@tglx> <3b1d16e357c1f9badeef405366492f05af26c085.camel@redhat.com> <878r11t8zu.ffs@tglx> <016902d9-3858-4c65-b3ec-f7a5103af63c@amd.com> <51d0dff8-2888-463c-95ab-71b491f12a8f@leemhuis.info> <877cg4ppd5.ffs@tglx> <87jzjxn6s5.ffs@tglx> <97bd95480a8b9951edc9ee2d2648d1b9c574e3b0.camel@redhat.com> <87bk58n6le.ffs@tglx> <2fd6009d21d606d13f0c472dbaa754a21f3105d9.camel@redhat.com> <87wmntkhak.ffs@tglx> <874japh4ww.ffs@tglx> <87sey8g5z6.ffs@tglx> <87ttiha77b.ffs@tglx> Autocrypt: addr=lyude@redhat.com; prefer-encrypt=mutual; keydata=mQINBFfk58MBEADeGfHLiTy6fhMmRMyRFfbUMo5CTzt9yqwmz72SUi1IRX7Qvq7ZTVNDC CDTYKt809dgl4xtUxSJJqgdljHSL5US3G72P9j9O5h0vT+XM9NavEXhNc48WzZt98opuCX23e36sa PLkVFY5TrC1PZsc16swjnjUWQdIblh5IOBko9yIvyJlqmApfLYAQoY+srYIFMxGBkcsv5nMrRflFl k5djg6Lyo8ogGCSRyNK4ja3lrX8niyHb90xTZWYEcn9o38xzOjpxEjVWny4QeEZBGGEvqHN5Z2Ek/ tXd4qNn44CGlzQk1CWJoE36TRvZAlqoUZ4m2+9YkBxILbgCxIg344OvZTLme+NraMINV014uURN/L O/dyCY14jOzAo3vgCzyNHrS/4XDs3nlE33TG/YL+luwPW85NWtg8N6Lsq46Y6T94lYCY+N7rrdzCQ kHWBXPUA8uGkzDO5zShkKt+qQr11Ww4xvYPr93TwseKtSEI6pyOS+iFmjOLseaxw2ml7ZCRNEKJFx xbxFQNP72aumm+9U8SFnL8TVlERr8HjlAY/5l3SMM91OkQ82xCRZAJl3ff2JMaYAixn5JXY1rZL1d d3DyZ8pdgfKey1QNq5M82eJOhecggOs5LBdqDkpN3Bi9hw+VW23jYmZ40shFEbUqlaShkYb8hlBlr DwLV/tRb9pdzQARAQABtB1MeXVkZSBQYXVsIDxjcGF1bEByZWRoYXQuY29tPokCNwQTAQgAIQUCV+ TnwwIbAwULCQgHAgYVCAkKCwIEFgIDAQIeAQIXgAAKCRDFRp+4dY+cK9L7D/9MoGlkMAalilfkOv4 NhXWbyYXN6Hi1UqeV7/6GRvkcVtAA+Txc+LfhxCgBzH422Q9nyhC3YKvccDLblJ9pk0YbX75vKWGk 5ERJjpNyoACHJ6/yO3VsXg/IMVKZKhJQv/6XkWIRd2PmIfdS9y7w9KwMsEXVktFiAFlvI5C1jIIkn 9aNiAFmalFkzNiFoEeGjLUwA/mr5Ln1aNGis6IlX0O6p02L4HfR3RhdfzguRqNNMyZNJ4VSinsQr2 8d9szAaayQf7IPic2PR+Lio+QGwopv3IyEzDVlZl9jTR+g1WueT4Vkc++aH4zSm+qlUDctpya5+PI EDe3f5zlOVhqGdMK5iEzTJdx/+lYHizlD54u5ll+sNPwEOOXxGyE0umz4YEI5MN449d9I4mPr0BDu iek0S/qFTzfXHjdwseYKyMT1pK6N8vfHSU/+5mmRK7TLfYs+Qg5XxBiqqM84yCsKR8AxuTSCKb9XD sMSevCk8bsLIUjjJAHm42W4sRtVFLzToUBjvmg86x50PyKUh9oaDOcvp6rOJzOWfmMBql2rX0/rHz GO+0332Q8Lb/HT3585EgRB6kRMIqW8AOAHlKfYn4rhhRbXs0K+UBSJEuDf6Wo2T8kIVn8gnrrp36b ebqKuZcMZXUyHULT265BwiPEc/naRwumBKRHOG+7T3VboqraH/bQdTHl1ZGUgUGF1bCA8bHl1ZGVA cmVkaGF0LmNvbT6JAjgEEwECACIFAli/Sq4CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJE MVGn7h1j5wrKfUP/R5C55A0pezHcoYVflibTBmY1faSluvNaV6oK55ymqwYxZ6DlgKOfsEY0W0Kvf 5ne9F1I1RUU50pDlxBxViOui6Rnu+No0eE3B4o2v0n1pIlGlsGQoTLzKb+l+AnH3Nm2Z1lCNrebHD lZm+DEV6yf1c2E/LlTOIZm0dcamuz5aLxAMsmdc5nkQU7ZZcAyH5kxy4Wj972RcSJ0PyqIfJqbaTb Qd1ZEQbKPtXnhfedKSXowtPsydYp02R1hJessIywIPVoYbxA9jp65Ju4pmmt0tREa2/zLcggOgOta TBLNx/b0sAtMLPP8sovkZyz/Oxw29zgugtu1JXQmTb27xtVKBBGV5Y57yWAO4fG/dl2RhUQSJ1u+h kgeVJEN16nx4dQgVEYHNRoIM47VDu7iVP5+sAagw4n8FDlxOmf4WgGvnL/SmTflR01iadF7exwzDy uvu+86iYHsOaTLNr2IascU2UcH9Cv45FUtbh+Eel5q63zVPBezasEXGyEbcLfGyIMXnsSVi2Pj7Xr dhtZguu1d9I5dlV2c32pFGli88y4kA5vYFjpUtQPNZZwf+0onXuTcBeEl5npypMNjZnUjiEKlqRD4 XQiGFwwbfyG7ivoU8ISOW+g64EryNDuQk6Npgegm/nG6o3v+sOA/+dSIj090jgnD76MbocCtFvypj 2Tnz0HtBhMeXVkZSA8bHl1ZGVAcmVkaGF0LmNvbT6JAjgEEwECACIFAli/TOoCGwMGCwkIBwMCBhU IAgkKCwQWAgMBAh4BAheAAAoJEMVGn7h1j5wryDMP/AuY4LrFWCdp/vofq7S/qVUNj4gzxN1rY/oU 8ZTp+ZQpw2xVXB1WNC8kI96vyJFJ7SKlsWSuEsS/9wzWlaT+SyF83ejGfhUSENXadR5ihQ/wqwmHx W32DZFkCunvmAkUBgDgNhQpQn4Pr/rhSfzKg/cIAkKDGTg+4ahJ0Yn4VU1eIk6MAikg2vjAJMwCiK 1lEb59w/eSaM8/LeVl29eJxWgYieCYZl6eGjcnbp+Ag3rka3QD91/CR0+ajnkQ434tvYL9RYqizoc lhjGwNWy7YYyCg16Lkpox9Z8b4rey+MY+lH2ZbWMd56ZHeM8cAZ3WoBJ2JCgWX0Iswko4w+37lY72 F51iGtaJYBJwsTIe/wuGuBCvTlrCz86lNLz0MxzFNWys5zVdAJ6OBzSDFiTusFpnYYBgQk+006Fdm SxsS5tlihAnSJAqBfOg6iCAFMBnDbb55MHr5PV86AmjaRtZDTNsfzkFbmtudYcVX2f4E5i4Qeaa4l /a3zh4U5lovveCWLMr9TyPAWS6MO6hjQO2WZ5n9NT7B7RvW2YKON4Dc8+wjCu/3QGhXmtbUYb9LBZ Hc7ULBNznyF7OK61IaiV7w3H6uSe4q0S04Hqmdo40YgVmHphucAHKbLKJAWms+0kjipHu5e80Ad8m U6scMawBiJ/Eh9OKgLQKT3xafADhshbbtDJMeXVkZSBQYXVsIChQZXJzb25hbCBlbWFpbCkgPHRoY XRzbHl1ZGVAZ21haWwuY29tPokCOAQTAQIAIgUCWPpUnQIbAwYLCQgHAwIGFQgCCQoLBBYCAwECHg ECF4AACgkQxUafuHWPnCv+WxAA0kFzpWCv0F8Z73LRjSxxHlY7Ro3dVdXzr8JvkD2AQiukWeOlCGc rrk94TipcVvMEsO8feL/BY7QTCb19/koHR9wNYjbYtkIUOatatPE+GUPNu72+gjoMsiwY7rbkNIrd KRroYg9paAzwLfh6B9DVoT4ynQLjIfK8EKvC7vxZ9hyyrB84yZLZm7aSTfyyWWdhKrfyhMBQ/si+O tcwNgFavtnSST7j7WmS4/7pNoUXC+tRTfSIzYK082XVgvWPw7K6uKmHDxXUsiTz/RG8t+CLH0L0Gc I/rrQ7N/QGBij3476nrNNwlpuU5y9dOkD+lbAcH1PjNOGlFUjx8wbTiJTTvX9yF9B/pLE/O2SMva5 uLAmGLFSbj6dq60bf1+T3b8FqtMvfJ7QkArAYiDOpDz9KPVITE0E9mL04Cgk2mHjN6h3WjNwqE4F1 ezjtWPyKvmThxwzCVMBGoxa07aImG5/HeuyP3fsBFwu5DL8PePfkMUuCnFgYMIKbQAsj3DXC4SHBW BNZ+Y1boZFlInSEDGlAenMa4pcQ2ea3jdSibQvx/fpoHiYN87DlhNLBor2KGKz176rnQp2whDdB85 EeQbx1S2echQ9x/SPF0/9oAB3/qvtxULmpFGaGh0J6UXYp34w79sZzmjphypJXacxHJkegFZf7I5l 8doKQgPpApRcFGaE= Organization: Red Hat Inc. Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.1 (3.52.1-1.fc40) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2024-05-29 at 00:43 +0200, Thomas Gleixner wrote: > Lyude! >=20 > On Thu, May 23 2024 at 12:47, Thomas Gleixner wrote: > > Something I wanted to ask before. Is the BIOS of that machine up to > > date? >=20 > Any update on this? I really don't want to add magic workarounds if > there is a BIOS update which fixes it. OK - just booted a normal kernel up after updating the BIOS and you're right - that does appear to solve the problem :). Thank you! >=20 > Thanks, >=20 > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tglx >=20 --=20 Cheers, Lyude Paul (she/her) Software Engineer at Red Hat