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=-5.3 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 56AC7C433E6 for ; Wed, 22 Jul 2020 14:23:51 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 2AB362080D for ; Wed, 22 Jul 2020 14:23:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="awDiXnCA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2AB362080D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C89736E823; Wed, 22 Jul 2020 14:23:49 +0000 (UTC) Received: from mail-ej1-x641.google.com (mail-ej1-x641.google.com [IPv6:2a00:1450:4864:20::641]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3B5336E822; Wed, 22 Jul 2020 14:23:48 +0000 (UTC) Received: by mail-ej1-x641.google.com with SMTP id br7so2410747ejb.5; Wed, 22 Jul 2020 07:23:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=reply-to:subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=4eDGMiirBr/9wj0aV+FWFSQ39qot6+wnOp4Iy5F1qKw=; b=awDiXnCAOzBfXEM7w8PJ3tM3M1ix7xTsKONg8BwDAqtB/5SooWmpeYqhsBclY3dz1T 8UxHDsup2Iw2w0nR4a/Af6J2xG8/DkpECOZs2nPn1p5ESnv/FFdQ4jXOer0Nvdc+Z1QL lPKaVIHuvz/eakMsfVLRj+gUUe/Nu7XfFTwheAZdGUHeQzTkD2ZeFkdZ6S0AqZUc/a8u Ef8PCJqmOrOtOIPZKl/U7LO1q/QY3WR1M0whWlEyt1JbQefsCYzAg0GTz8K4YmjRdEbs VoJ0oYhlIzs3BeTpU6By8xlkTXpzgEWGtGWjGXwdeYU9JW9EySZIpKX4nwKGeGpux0V4 9Qkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:reply-to:subject:to:cc:references:from :message-id:date:user-agent:mime-version:in-reply-to :content-transfer-encoding:content-language; bh=4eDGMiirBr/9wj0aV+FWFSQ39qot6+wnOp4Iy5F1qKw=; b=SHdtvsodNIzMPK2W89C0/yqXCuEEa2B8pBcKzHLX36NB/5XSjvhsA/ALDyA+KdypuK iVqMJ+VM/Pb3ZlhclwYUJMKSO2JVKpdw/xpwWpEL0AIA+DLVOHtlIxfu9cILaP2xtyhD dmMKLZvDTmatDqcI3J59UNOBRMgXOjZ8aAld5L0FB5nRd0LDnYVpZ6FpHmi45c/Sr6CK SjRWH3+vESo4bN/LuwW0cR6sQvexKwxdOFnb53Y3fX1fiCsaCxWNPFVRLSK/vLB/3GcW syAPiBsEMSYuYTtrtMFyzlXbXhETP5l2Xt/BvKiaMckneCbwRpeKRhfx7insyDIoxBrN Dquw== X-Gm-Message-State: AOAM532SdiQGHyPwYS3llwfn6NrzHzBa5NIrMcvJVzGP7hO9pxdqxxBd pmlVwULVbphwHv/DsSaBlJA= X-Google-Smtp-Source: ABdhPJweXE+1WURAaIs/HR95z4aF6xhhUwmufaRJKgZqDHvsKPtNi9tuWkQG2Tj3wIdhocnD1H/YYA== X-Received: by 2002:a17:906:4f16:: with SMTP id t22mr29680343eju.179.1595427826873; Wed, 22 Jul 2020 07:23:46 -0700 (PDT) Received: from ?IPv6:2a02:908:1252:fb60:be8a:bd56:1f94:86e7? ([2a02:908:1252:fb60:be8a:bd56:1f94:86e7]) by smtp.gmail.com with ESMTPSA id g21sm17224edr.45.2020.07.22.07.23.45 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 22 Jul 2020 07:23:46 -0700 (PDT) Subject: Re: [Linaro-mm-sig] [PATCH 1/2] dma-buf.rst: Document why indefinite fences are a bad idea To: Daniel Vetter , =?UTF-8?Q?Thomas_Hellstr=c3=b6m_=28Intel=29?= References: <20200707201229.472834-4-daniel.vetter@ffwll.ch> <20200709123339.547390-1-daniel.vetter@ffwll.ch> <93b673b7-bb48-96eb-dc2c-bd4f9304000e@shipmail.org> <20200721074157.GB3278063@phenom.ffwll.local> <3603bb71-318b-eb53-0532-9daab62dce86@amd.com> <57a5eb9d-b74f-8ce4-7199-94e911d9b68b@shipmail.org> <805c49b7-f0b3-45dc-5fe3-b352f0971527@shipmail.org> <92393d26-d863-aac6-6d27-53cad6854e13@shipmail.org> <8fd999f2-cbf6-813c-6ad4-131948fb5cc5@shipmail.org> <697d1b5e-5d1c-1655-23f8-7a3f652606f3@shipmail.org> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: Date: Wed, 22 Jul 2020 16:23:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: christian.koenig@amd.com Cc: Daniel Stone , linux-rdma , Felix Kuehling , DRI Development , =?UTF-8?Q?Christian_K=c3=b6nig?= , "moderated list:DMA BUFFER SHARING FRAMEWORK" , Steve Pronovost , amd-gfx mailing list , Jason Ekstrand , Jesse Natalie , Daniel Vetter , Thomas Hellstrom , Mika Kuoppala , Intel Graphics Development , Linux Media Mailing List Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" QW0gMjIuMDcuMjAgdW0gMTY6MDcgc2NocmllYiBEYW5pZWwgVmV0dGVyOgo+IE9uIFdlZCwgSnVs IDIyLCAyMDIwIGF0IDM6MTIgUE0gVGhvbWFzIEhlbGxzdHLDtm0gKEludGVsKQo+IDx0aG9tYXNf b3NAc2hpcG1haWwub3JnPiB3cm90ZToKPj4gT24gMjAyMC0wNy0yMiAxNDo0MSwgRGFuaWVsIFZl dHRlciB3cm90ZToKPj4+IEknbSBwcmV0dHkgc3VyZSB0aGVyZSdzIG1vcmUgYnVncywgSSBqdXN0 IGhhdmVuJ3QgaGVhcmQgZnJvbSB0aGVtIHlldC4KPj4+IEFsc28gZHVlIHRvIHRoZSBvcHQtaW4g bmF0dXJlIG9mIGRtYS1mZW5jZSB3ZSBjYW4gbGltaXQgdGhlIHNjb3BlIG9mCj4+PiB3aGF0IHdl IGZpeCBmYWlybHkgbmF0dXJhbGx5LCBqdXN0IGRvbid0IHB1dCB0aGVtIHdoZXJlIG5vIG9uZSBj YXJlcwo+Pj4gOi0pIE9mIGNvdXJzZSB0aGF0IGFsc28gaGlkZXMgZ2VuZXJhbCBsb2NraW5nIGlz c3VlcyBpbiBkbWFfZmVuY2UKPj4+IHNpZ25hbGxpbmcgY29kZSwgYnV0IHdlbGwgKnNocnVnKi4K Pj4gSG1tLCB5ZXMuIEFub3RoZXIgcG90ZW50aWFsIGJpZyBwcm9ibGVtIHdvdWxkIGJlIGRyaXZl cnMgdGhhdCB3YW50IHRvCj4+IHVzZSBncHUgcGFnZSBmYXVsdHMgaW4gdGhlIGRtYS1mZW5jZSBj cml0aWNhbCBzZWN0aW9ucyB3aXRoIHRoZQo+PiBiYXRjaC1iYXNlZCBwcm9ncmFtbWluZyBtb2Rl bC4KPiBZZWFoIHRoYXQncyBhIG1hc3NpdmUgY2FuIG9mIHdvcm1zLiBCdXQgbHVja2lseSB0aGVy ZSdzIG5vIHN1Y2ggZHJpdmVyCj4gbWVyZ2VkIGluIHVwc3RyZWFtLCBzbyBob3BlZnVsbHkgd2Ug Y2FuIHRoaW5rIGFib3V0IGFsbCB0aGUKPiBjb25zdHJhaW50cyBhbmQgaG93IHRvIGJlc3QgYW5u b3RhdGUmZW5mb3JjZSB0aGlzIGJlZm9yZSB3ZSBsYW5kIGFueQo+IGNvZGUgYW5kIGhhdmUgYmln IHJlZ3JldHMuCgpEbyB5b3Ugd2FudCBhIGJhZCBuZXdzPyBJIG9uY2UgbWFkZSBhIHByb3RvdHlw ZSBmb3IgdGhhdCB3aGVuIFZlZ2ExMCAKY2FtZSBvdXQuCgpCdXQgd2UgYWJhbmRvbmVkIHRoaXMg YXBwcm9hY2ggZm9yIHRoZSB0aGUgYmF0Y2ggYmFzZWQgYXBwcm9hY2ggYmVjYXVzZSAKb2YgdGhl IGhvcnJpYmxlIHBlcmZvcm1hbmNlLgoKS0ZEIGlzIGdvaW5nIHRvIHNlZSB0aGF0LCBidXQgdGhp cyBpcyBvbmx5IHdpdGggdXNlciBxdWV1ZXMgYW5kIG5vIApkbWFfZmVuY2UgaW52b2x2ZWQgd2hh dHNvZXZlci4KCkNocmlzdGlhbi4KCj4gLURhbmllbAo+Cj4KPgo+IC0tCj4gRGFuaWVsIFZldHRl cgo+IFNvZnR3YXJlIEVuZ2luZWVyLCBJbnRlbCBDb3Jwb3JhdGlvbgo+IGh0dHA6Ly9ibG9nLmZm d2xsLmNoCj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K PiBhbWQtZ2Z4IG1haWxpbmcgbGlzdAo+IGFtZC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCj4g aHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9hbWQtZ2Z4Cgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwg bWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK