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 Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 01FFFC43217 for ; Mon, 14 Feb 2022 13:58:46 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 8C59A4015E; Mon, 14 Feb 2022 13:58:46 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lVETn8D4IpGN; Mon, 14 Feb 2022 13:58:45 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp2.osuosl.org (Postfix) with ESMTPS id 1B316400A4; Mon, 14 Feb 2022 13:58:45 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id EA4BBC001A; Mon, 14 Feb 2022 13:58:44 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 7026EC000B for ; Mon, 14 Feb 2022 13:58:43 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 41D5360655 for ; Mon, 14 Feb 2022 13:58:43 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9lC1V8EbzVhh for ; Mon, 14 Feb 2022 13:58:41 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp3.osuosl.org (Postfix) with ESMTPS id 9790F60030 for ; Mon, 14 Feb 2022 13:58:41 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id C2B0468BEB; Mon, 14 Feb 2022 14:58:34 +0100 (CET) Date: Mon, 14 Feb 2022 14:58:34 +0100 From: Christoph Hellwig To: Tianyu Lan Subject: Re: [PATCH V2 1/2] Swiotlb: Add swiotlb_alloc_from_low_pages switch Message-ID: <20220214135834.GA30150@lst.de> References: <20220209122302.213882-1-ltykernel@gmail.com> <20220209122302.213882-2-ltykernel@gmail.com> <20220214081919.GA18337@lst.de> <4f433f07-05be-f81f-43e8-55c3f1af23b3@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4f433f07-05be-f81f-43e8-55c3f1af23b3@gmail.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: linux-hyperv@vger.kernel.org, brijesh.singh@amd.com, dave.hansen@linux.intel.com, hpa@zytor.com, kys@microsoft.com, Christoph Hellwig , hch@infradead.org, wei.liu@kernel.org, sthemmin@microsoft.com, x86@kernel.org, decui@microsoft.com, michael.h.kelley@microsoft.com, mingo@redhat.com, parri.andrea@gmail.com, thomas.lendacky@amd.com, Tianyu Lan , konrad.wilk@oracle.com, haiyangz@microsoft.com, bp@alien8.de, tglx@linutronix.de, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, vkuznets@redhat.com, robin.murphy@arm.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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gTW9uLCBGZWIgMTQsIDIwMjIgYXQgMDc6Mjg6NDBQTSArMDgwMCwgVGlhbnl1IExhbiB3cm90 ZToKPiBPbiAyLzE0LzIwMjIgNDoxOSBQTSwgQ2hyaXN0b3BoIEhlbGx3aWcgd3JvdGU6Cj4+IEFk ZGluZyBhIGZ1bmN0aW9uIHRvIHNldCB0aGUgZmxhZyBkb2Vzbid0IHJlYWxseSBjaGFuZ2UgbXVj aC4gIEFzIFJvYmluCj4+IHBvaW50ZWQgb3V0IGxhc3QgdGltZSB5b3Ugc2hvdWxkIGZpbmUgYSB3 YXkgdG8ganVzdCBjYWxsCj4+IHN3aW90bGJfaW5pdF93aXRoX3RibCBkaXJlY3RseSB3aXRoIHRo ZSBtZW1vcnkgYWxsb2NhdGVkIHRoZSB3YXkgeW91Cj4+IGxpa2UgaXQuICBPciBnaXZlbiB0aGF0 IHdlIGhhdmUgcXVpdGUgYSBmZXcgb2YgdGhlc2UgdHJ1c3RlZCBoeXBlcnZpc29yCj4+IHNjaGVt ZXMgbWF5YmUgYWRkIGFuIGFyZ3VtZW50IHRvIHN3aW90bGJfaW5pdCB0aGF0IHNwZWNpZmllcyBo b3cgdG8KPj4gYWxsb2NhdGUgdGhlIG1lbW9yeS4KPgo+IFRoYW5rcyBmb3IgeW91ciBzdWdnZXN0 aW9uLiBJIHdpbGwgdHJ5IHRoZSBmaXJzdCBhcHByb2FjaCBmaXJzdCBhcHByb2FjaC4KClRha2Ug YSBsb29rIGF0IHRoZSBTV0lPVExCX0FOWSBmbGFnIGluIHRoaXMgV0lQIGJyYW5jaDoKCiAgIGh0 dHA6Ly9naXQuaW5mcmFkZWFkLm9yZy91c2Vycy9oY2gvbWlzYy5naXQvc2hvcnRsb2cvcmVmcy9o ZWFkcy9zd2lvdGxiLWluaXQtY2xlYW51cAoKVGhhdCBiZWluZyBzYWlkIEknbSBub3Qgc3VyZSB0 aGF0IGVpdGhlciB0aGlzIGZsYWcgb3IgdGhlIGV4aXN0aW5nIHBvd2VycGMKY29kZSBp0ZUgYWN0 dWFsbHkgdGhlIHJpZ2h0IHRoaW5nIHRvIGRvLiAgV2Ugc3RpbGwgbmVlZCB0aGUgNEcgbGltaXRl ZApidWZmZXIgdG8gc3VwcG9ydCBkZXZpY2VzIHdpdGggYWRkcmVzc2luZyBsaW1pdGF0aW9ucy4g IFNvIEkgdGhpbmsgd2UgbmVlZAphbiBhZGRpdGlvbmFsIGlvX3RsYl9tZW0gaW5zdGFuY2UgZm9y IHRoZSBkZXZpY2VzIHdpdGhvdXQgYWRkcmVzc2luZwpsaW1pdGF0aW9ucyBpbnN0ZWFkLgoKCQpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWls aW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5s aW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=