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Thu, 28 Apr 2022 08:07:54 -0700 (PDT) Message-ID: Date: Thu, 28 Apr 2022 16:07:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [RFC PATCH 1/2] swiotlb: Split up single swiotlb lock Content-Language: en-GB To: Andi Kleen , Christoph Hellwig References: <20220428141429.1637028-1-ltykernel@gmail.com> <20220428141429.1637028-2-ltykernel@gmail.com> <1517d2f0-08d6-a532-7810-2161b2dff421@linux.intel.com> From: Robin Murphy In-Reply-To: <1517d2f0-08d6-a532-7810-2161b2dff421@linux.intel.com> Cc: parri.andrea@gmail.com, thomas.lendacky@amd.com, wei.liu@kernel.org, Tianyu Lan , konrad.wilk@oracle.com, linux-hyperv@vger.kernel.org, Tianyu Lan , linux-kernel@vger.kernel.org, michael.h.kelley@microsoft.com, iommu@lists.linux-foundation.org, andi.kleen@intel.com, brijesh.singh@amd.com, vkuznets@redhat.com, kys@microsoft.com, kirill.shutemov@intel.com, hch@lst.de 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" T24gMjAyMi0wNC0yOCAxNTo1NSwgQW5kaSBLbGVlbiB3cm90ZToKPiAKPiBPbiA0LzI4LzIwMjIg Nzo0NSBBTSwgQ2hyaXN0b3BoIEhlbGx3aWcgd3JvdGU6Cj4+IE9uIFRodSwgQXByIDI4LCAyMDIy IGF0IDAzOjQ0OjM2UE0gKzAxMDAsIFJvYmluIE11cnBoeSB3cm90ZToKPj4+IFJhdGhlciB0aGFu IGludHJvZHVjZSB0aGlzIGV4dHJhIGxldmVsIG9mIGFsbG9jYXRvciBjb21wbGV4aXR5LCBob3cg Cj4+PiBhYm91dAo+Pj4ganVzdCBkaXZpZGluZyB1cCB0aGUgaW5pdGlhbCBTV0lPVExCIGFsbG9j YXRpb24gaW50byBtdWx0aXBsZSBpb190bGJfbWVtCj4+PiBpbnN0YW5jZXM/Cj4+IFllYWguwqAg V2UncmUgYWxtb3N0IGRvbmUgcmVtb3ZpbmcgYWxsIGtub3dsZWRnZSBvZiBzd2lvdGxiIGZyb20g ZHJpdmVycywKPj4gc28gdGhlIHZlcnkgbGFzdCB0aGluZyBJIHdhbnQgaXMgYW4gaW50ZXJmYWNl IHRoYXQgYWxsb3dzIGEgZHJpdmVyIHRvCj4+IGFsbG9jYXRlIGEgcGVyLWRldmljZSBidWZmZXIu Cj4gCj4gQXQgbGVhc3QgZm9yIFREWCBuZWVkIHBhcmFsbGVsaXNtIHdpdGggYSBzaW5nbGUgZGV2 aWNlIGZvciBwZXJmb3JtYW5jZS4KPiAKPiBTbyBpZiB5b3Ugc3BsaXQgdXAgdGhlIGlvIHRsYiBt ZW1zIGZvciBhIGRldmljZSB0aGVuIHlvdSB3b3VsZCBuZWVkIGEgCj4gbmV3IG1lY2hhbmlzbSB0 byBsb2FkIGJhbGFuY2UgdGhlIHJlcXVlc3RzIGZvciBzaW5nbGUgZGV2aWNlIG92ZXIgdGhvc2Uu IAo+IEkgZG91YnQgaXQgd291bGQgYmUgYW55IHNpbXBsZXIuCgpFaCwgSSB0aGluayBpdCB3b3Vs ZCBiZSwgc2luY2UgdGhlIHJvdW5kLXJvYmluIHJldHJ5IGxvb3AgY2FuIHRoZW4ganVzdCAKc2l0 IGFyb3VuZCB0aGUgZXhpc3RpbmcgaW9fdGxiX21lbS1iYXNlZCBhbGxvY2F0b3IsIHZzLiB0aGUg Y2h1cm4gb2YgCmluc2VydGluZyBpdCBpbiB0aGUgbWlkZGxlLCBwbHVzIGl0J3MgdGhlbiByZWFs bHkgZWFzeSB0byBzdGF0aWNhbGx5IApkaXN0cmlidXRlIGRpZmZlcmVudCBzdGFydGluZyBwb2lu dHMgYWNyb3NzIGRpZmZlcmVudCBkZXZpY2VzIHZpYSAKZGV2LT5kbWFfaW9fdGxiX21lbSBpZiB3 ZSB3YW50ZWQgdG8uCgpBZG1pdHRlZGx5IHRoZSBvdmVyYWxsIHBhdGNoIHByb2JhYmx5IGVuZHMg dXAgYWJvdXQgdGhlIHNhbWUgc2l6ZSwgc2luY2UgCml0IGxpa2VseSBwdXNoZXMgYSBiaXQgbW9y ZSBjb21wbGV4aXR5IGludG8gc3dpb3RsYl9pbml0IHRvIGNvbXBlbnNhdGUsIApidXQgdGhhdCdz IHN0aWxsIGEgdHJhZGUtb2ZmIEkgbGlrZS4KClRoYW5rcywKUm9iaW4uCl9fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21t dUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlv bi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==