From owner-freebsd-questions@freebsd.org Wed Jun 17 19:57:44 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 3D5ED333A8C for ; Wed, 17 Jun 2020 19:57:44 +0000 (UTC) (envelope-from 4250.82.1d4c20000b75039.a61fb44b9c98b7dd167b0337e3849513@email-od.com) Received: from s1-b0c6.socketlabs.email-od.com (s1-b0c6.socketlabs.email-od.com [142.0.176.198]) (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 49nG7q04zlz4Q2s for ; Wed, 17 Jun 2020 19:57:42 +0000 (UTC) (envelope-from 4250.82.1d4c20000b75039.a61fb44b9c98b7dd167b0337e3849513@email-od.com) DKIM-Signature: v=1; a=rsa-sha256; d=email-od.com;i=@email-od.com;s=dkim; c=relaxed/relaxed; q=dns/txt; t=1592423863; x=1595015863; h=content-transfer-encoding:content-type:mime-version:references:in-reply-to:message-id:subject:cc:to:from:date:x-thread-info; bh=w5exwTfw4RNezaFv7HHNSxu16CdpW00+fF8F8yhjSIk=; b=tfp/zosSK6p3GO0/kFjhffunZdELBJ3r4w7PDQ/GT+Vb5Jfd3ttBfkJow2FZFnLbG5Jf94xHE+4OsD11vvWvCjaNvlNhBaaZ6Z8gAQRVApP6hZvZEFFF8PkdoQa56+BsC68HaL4/CHR6F0tf6W4LWprnUVPDY7Q5I9cHSZaWM3o= X-Thread-Info: NDI1MC45Mi4xZDRjMjAwMDBiNzUwMzkuZnJlZWJzZC1xdWVzdGlvbnM9ZnJlZWJzZC5vcmc= Received: from r2.h.in.socketlabs.com (r2.h.in.socketlabs.com [142.0.180.12]) by mxsg2.email-od.com with ESMTP(version=Tls12 cipher=Aes256 bits=256); Wed, 17 Jun 2020 15:57:35 -0400 Received: from smtp.lan.sohara.org (EMTPY [185.202.17.215]) by r2.h.in.socketlabs.com with ESMTP(version=Tls12 cipher=Aes256 bits=256); Wed, 17 Jun 2020 15:57:33 -0400 Received: from [192.168.63.1] (helo=steve.lan.sohara.org) by smtp.lan.sohara.org with smtp (Exim 4.92.3 (FreeBSD)) (envelope-from ) id 1jleBg-000HhN-LN; Wed, 17 Jun 2020 20:57:32 +0100 Date: Wed, 17 Jun 2020 20:57:32 +0100 From: Steve O'Hara-Smith To: malaizhichun@tom.com Cc: freebsd-questions@freebsd.org Subject: Re: Why does FreeBSD not use the Linux kernel? Message-Id: <20200617205732.58394b1570280c7959a01cd4@sohara.org> In-Reply-To: <3a48ab1ab198c330400be3e942f921f2cd3c3e11.camel@tom.com> References: <3a48ab1ab198c330400be3e942f921f2cd3c3e11.camel@tom.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; amd64-portbld-freebsd12.0) X-Clacks-Overhead: "GNU Terry Pratchett" Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 49nG7q04zlz4Q2s X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=pass header.d=email-od.com header.s=dkim header.b=tfp/zosS; dmarc=none; spf=pass (mx1.freebsd.org: domain of 4250.82.1d4c20000b75039.a61fb44b9c98b7dd167b0337e3849513@email-od.com designates 142.0.176.198 as permitted sender) smtp.mailfrom=4250.82.1d4c20000b75039.a61fb44b9c98b7dd167b0337e3849513@email-od.com X-Spamd-Result: default: False [-1.25 / 15.00]; RCVD_TLS_LAST(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[email-od.com:s=dkim]; NEURAL_HAM_MEDIUM(-1.01)[-1.014]; FROM_HAS_DN(0.00)[]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip4:142.0.176.0/20]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[sohara.org]; NEURAL_HAM_LONG(-0.98)[-0.979]; RCVD_COUNT_THREE(0.00)[4]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[email-od.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[142.0.176.198:from]; NEURAL_HAM_SHORT(-0.55)[-0.553]; FREEMAIL_TO(0.00)[tom.com]; FORGED_SENDER(0.30)[steve@sohara.org,4250.82.1d4c20000b75039.a61fb44b9c98b7dd167b0337e3849513@email-od.com]; MIME_TRACE(0.00)[0:+]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:7381, ipnet:142.0.176.0/22, country:US]; FROM_NEQ_ENVFROM(0.00)[steve@sohara.org,4250.82.1d4c20000b75039.a61fb44b9c98b7dd167b0337e3849513@email-od.com]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Jun 2020 19:57:44 -0000 On Wed, 17 Jun 2020 11:33:25 +0800 kindu smith wrote: > Why does FreeBSD not use the Linux kernel? The most fundamental reason that FreeBSD does not use *any* code from the Linux kernel is the GPL which is fundamentally incompatible with the BSD license. There was MirosBSD which was BSD userland running on a Linux kernel but the project has been abandoned for some years. Personally I think it is a very good thing that there are several essentially independent code bases that implement OSs that I'm happy to consider unix. -- Steve O'Hara-Smith