From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23477C433C1 for ; Wed, 24 Mar 2021 15:00:11 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 86C73619FE for ; Wed, 24 Mar 2021 15:00:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 86C73619FE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=vt.edu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernelnewbies-bounces@kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.94) (envelope-from ) id 1lP4z9-0000yW-6v; Wed, 24 Mar 2021 10:59:51 -0400 Received: from mail-qk1-x734.google.com ([2607:f8b0:4864:20::734]) by shelob.surriel.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1lP4z6-0000yQ-NR for kernelnewbies@kernelnewbies.org; Wed, 24 Mar 2021 10:59:49 -0400 Received: by mail-qk1-x734.google.com with SMTP id y18so18259861qky.11 for ; Wed, 24 Mar 2021 07:59:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vt-edu.20150623.gappssmtp.com; s=20150623; h=sender:from:to:cc:subject:in-reply-to:references:mime-version :content-transfer-encoding:date:message-id; bh=bSKK2r0xKsKEBV3M/jWOzPnyylZfwwYXjJoGwtC3O+c=; b=m7RZW7I/qo5AjG7YuUiE6gN5NwiXUMQg0pUOWiw1CUf8MVIYTlBqg2EI+9ngOX8c09 1MMOokU0QnFyUGOb2x1IyDmZN3A3YqrZDbPc4tYOeMgo3JkCkx7GLOm50t5LgJqCJwZK LPyPSoONlO9lQFU4eKUv1jm8z7H1rAFcsk+5Vy1SQcecr5CMvPsjFvyzhD+lLJE+zyz1 nLryo4ktWw9NAEyubg1SUIdD3P63MxnG6fMAIgBkuoGwwhlxod7ZPwDVWKmazIWlDtE2 wbuzAgTcOerBDw1HG9epceBy2W5wpj1ccURRixTYLPckijuQw6KsvLt6ZrF1ctFcMBmR /QwA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:in-reply-to:references :mime-version:content-transfer-encoding:date:message-id; bh=bSKK2r0xKsKEBV3M/jWOzPnyylZfwwYXjJoGwtC3O+c=; b=KbdtpjcYuw6McbMNsKP17qVJo3oYq0KDofksY+6uIfLuNAXhg0DzQCbx9tsmD2P33l /My+0m/9cXF/SX4Coa5digLoTpo9yVgWQW16s+05NkFMso243C7V9HAvWca5my6gqZGg jcGAPv1+ro7JEQ6yr03qqjqhG/FsYUZBIlQAnBiq2pqferoBqOkIl9cyKxs9SsmptaOs 2SJqwOb+zGHqT5m8mJgGuA+iQHR/9OdOABfA1Rzxy/o/uhXYwLxPfkVzt3D85dS1UuNS 3kQuF9caM36vnxPnMULAOHVJmL471FPp5NwlYvMO0FvVdGWjfnDZXIeNEV8pAhg6JOTj 8MBg== X-Gm-Message-State: AOAM533Ty4lYGXA4FmqBtxxikBbbb/2rZlzSjhtZ0BvNFYAIqe69Xp8A nMoBRooadQohWBCi240hCZjRRjb6yMaEAA== X-Google-Smtp-Source: ABdhPJyyDQ9QLaGCJP52nH+rAofAlngJjPt2Jbo98ZnAgZ00B7lmD1PxnVq8Y7w6yiuaxUeSU2v5yA== X-Received: by 2002:a37:a408:: with SMTP id n8mr3428677qke.6.1616597986890; Wed, 24 Mar 2021 07:59:46 -0700 (PDT) Received: from turing-police ([2601:5c0:c380:d61::359]) by smtp.gmail.com with ESMTPSA id f9sm1831493qkk.115.2021.03.24.07.59.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Mar 2021 07:59:46 -0700 (PDT) From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Google-Original-From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev To: Aruna Hewapathirane Subject: Re: "Invalid signature" issue on dev kernel launch In-Reply-To: References: <73298.1616563564@turing-police> Mime-Version: 1.0 Date: Wed, 24 Mar 2021 10:59:45 -0400 Message-ID: <108802.1616597985@turing-police> Cc: Gidi Gal , kernelnewbies X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3709381631998319375==" Errors-To: kernelnewbies-bounces@kernelnewbies.org --===============3709381631998319375== Content-Type: multipart/signed; boundary="==_Exmh_1616597984_11646P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit --==_Exmh_1616597984_11646P Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Wed, 24 Mar 2021 09:21:31 -0400, Aruna Hewapathirane said: > > And all of that has to fit in 8K of stack. That's why we warn when th= ings have > > a large stack frame entry. > I still don't understand why the 8K barrier ? Why can't we make it say = 16K ? The issue is that then you need 4 contiguous pages for fork() to succeed,= which can become a problem if memory gets fragmented. The chances of being able to= find 2 contiguous pages are *much* higher than 4. --==_Exmh_1616597984_11646P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.9.0 11/07/2018 iQIVAwUBYFtT4AdmEQWDXROgAQJTKxAAqFCh2GvUC6yeIfYG7/VA99XzydKxUaku nQiegquKaOSirzgjhOmLbK7CN1kosdV756RhEx9lata1laK8JhRKMXGlE73QVmF9 VQ9DfQnL87BvbaIsUWb9IwHTQcFPHRMcyUux7F8/UsGUoVH6e4570vZAsidAz1n+ HWn3gss0WxgGYcvojAndu0SJdp9766aEO/70n8R1kf5Gbs29c5/J0rMQYUXSXOVd Uo8xVUJUldSao9fAMjeqipKOkhjBvuAZp+ITELq1XhM+guDKLAOs0zkYYA1JuV7v 0TH/hjkz6PrqrnOmXoPNZV2bh/eQQg+D8XYax54DEsOST8RP97wwQ23iPW7e60/c LSueGFwaETtKbmRkli+kfhpDGOm8WHfIBzhTKz/GXefxl7pGlj12ZWaRdFvTwv0g ufVX7l8238up3Hww79kZfMwcdGf0FSlnLCsLu8SFb+QocnCKGAY6Z6SKNR5pYF6y avwXqCkr395RCICapIhh5wkEwcCq+xA/0DDrr2oGut3jpKaxAcanhEaOPGVrrsTY if3k3FvKc9Y+7QlA/t5SJ96wLyiXYFXJ7YdSkKD+zMECwslvy3ho+5yVqfh+kLET BUTSRZhOuAyABvDuspdsRyJOQ0k//9bI87Tqa6hQhSXbN3kW+kwDg+iOrYmIylnf g0NwAuUH/H4= =f0rS -----END PGP SIGNATURE----- --==_Exmh_1616597984_11646P-- --===============3709381631998319375== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies --===============3709381631998319375==--