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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 6DBB3C433E0 for ; Tue, 30 Jun 2020 13:47:49 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 2482520675 for ; Tue, 30 Jun 2020 13:47:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2482520675 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=iogearbox.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id E1FA588020; Tue, 30 Jun 2020 13:47:48 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ClnKD6weWwEA; Tue, 30 Jun 2020 13:47:46 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id B5F1287ED5; Tue, 30 Jun 2020 13:47:46 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8D9F7C0865; Tue, 30 Jun 2020 13:47:46 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id E71FDC016E for ; Tue, 30 Jun 2020 13:47:44 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id D4660886A4 for ; Tue, 30 Jun 2020 13:47:44 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vhXam8t1k16w for ; Tue, 30 Jun 2020 13:47:43 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from www62.your-server.de (www62.your-server.de [213.133.104.62]) by hemlock.osuosl.org (Postfix) with ESMTPS id 8F5EC886A3 for ; Tue, 30 Jun 2020 13:47:43 +0000 (UTC) Received: from sslproxy05.your-server.de ([78.46.172.2]) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1jqGbZ-00070l-Fh; Tue, 30 Jun 2020 15:47:21 +0200 Received: from [178.196.57.75] (helo=pc-9.home) by sslproxy05.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jqGbZ-0003zd-6p; Tue, 30 Jun 2020 15:47:21 +0200 Subject: Re: [PATCH net] xsk: remove cheap_dma optimization To: Christoph Hellwig References: <20200626134358.90122-1-bjorn.topel@gmail.com> <20200627070406.GB11854@lst.de> <88d27e1b-dbda-301c-64ba-2391092e3236@intel.com> <81aec200-c1a0-6d57-e3b6-26dad30790b8@intel.com> <903c646c-dc74-a15c-eb33-e1b67bc7da0d@iogearbox.net> <20200630050712.GA26840@lst.de> From: Daniel Borkmann Message-ID: <7bd1f3ad-f1c7-6f8c-ef14-ec450050edf2@iogearbox.net> Date: Tue, 30 Jun 2020 15:47:20 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20200630050712.GA26840@lst.de> Content-Language: en-US X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.102.3/25858/Mon Jun 29 15:30:49 2020) Cc: maximmi@mellanox.com, konrad.wilk@oracle.com, jonathan.lemon@gmail.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, netdev@vger.kernel.org, bpf@vger.kernel.org, =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , davem@davemloft.net, magnus.karlsson@intel.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gNi8zMC8yMCA3OjA3IEFNLCBDaHJpc3RvcGggSGVsbHdpZyB3cm90ZToKPiBPbiBNb24sIEp1 biAyOSwgMjAyMCBhdCAwNToxODozOFBNICswMjAwLCBEYW5pZWwgQm9ya21hbm4gd3JvdGU6Cj4+ IE9uIDYvMjkvMjAgNToxMCBQTSwgQmrDtnJuIFTDtnBlbCB3cm90ZToKPj4+IE9uIDIwMjAtMDYt MjkgMTU6NTIsIERhbmllbCBCb3JrbWFubiB3cm90ZToKPj4+Pgo+Pj4+IE9rLCBmYWlyIGVub3Vn aCwgcGxlYXNlIHdvcmsgd2l0aCBETUEgZm9sa3MgdG8gZ2V0IHRoaXMgcHJvcGVybHkgaW50ZWdy YXRlZCBhbmQKPj4+PiByZXN0b3JlZCB0aGVuLiBBcHBsaWVkLCB0aGFua3MhCj4+Pgo+Pj4gRGFu aWVsLCB5b3Ugd2VyZSB0b28gcXVpY2shIFBsZWFzZSByZXZlcnQgdGhpcyBvbmU7IENocmlzdG9w aCBqdXN0IHN1Ym1pdHRlZCBhIDQtcGF0Y2gtc2VyaWVzIHRoYXQgYWRkcmVzc2VzIGJvdGggdGhl IERNQSBBUEksIGFuZCB0aGUgcGVyZiByZWdyZXNzaW9uIQo+Pgo+PiBOaWNlLCB0b3NzZWQgZnJv bSBicGYgdHJlZSB0aGVuISAoTG9va3MgbGlrZSBpdCBkaWRuJ3QgbGFuZCBvbiB0aGUgYnBmIGxp c3QgeWV0LAo+PiBidXQgc2VlbXMgb3RoZXIgbWFpbHMgYXJlIGN1cnJlbnRseSBzdHVjayBhcyB3 ZWxsIG9uIHZnZXIuIEkgcHJlc3VtZSBpdCB3aWxsIGJlCj4+IHJvdXRlZCB0byBMaW51cyB2aWEg Q2hyaXN0b3BoPykKPiAKPiBJIHNlbmQgdGhlIHBhdGNoZXMgdG8gdGhlIGJwZiBsaXN0LCBkaWQg eW91IGdldCB0aGVtIG5vdyB0aGF0IHZnZXIKPiBpcyB1bmNsb2dnZWQ/ICBUaGlua2luZyBhYm91 dCBpdCB0aGUgYmVzdCByb3V0ZSBtaWdodCBiZSB0aHJvdWdoCj4gYnBmL25ldCwgc28gaWYgdGhh dCB3b3JrcyBmb3IgeW91IHBsZWFzZSBwaWNrIGl0IHVwLgoKWWVhaCwgdGhhdCdzIGZpbmUsIEkg anVzdCBhcHBsaWVkIHlvdXIgc2VyaWVzIHRvIHRoZSBicGYgdHJlZS4gVGhhbmtzIQpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxp c3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZv dW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=