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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 79022C4360F for ; Fri, 5 Apr 2019 15:57:01 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 47C242146F for ; Fri, 5 Apr 2019 15:57:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=tycho-ws.20150623.gappssmtp.com header.i=@tycho-ws.20150623.gappssmtp.com header.b="SlpVczIJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 47C242146F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=tycho.ws Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id ED1FA255D; Fri, 5 Apr 2019 15:57:00 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id A8B442555 for ; Fri, 5 Apr 2019 15:56:11 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-yw1-f67.google.com (mail-yw1-f67.google.com [209.85.161.67]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id EC643FD for ; Fri, 5 Apr 2019 15:56:10 +0000 (UTC) Received: by mail-yw1-f67.google.com with SMTP id p64so2477027ywg.7 for ; Fri, 05 Apr 2019 08:56:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tycho-ws.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=ID62lT7CASQ5exKZNTIxim8rPMV7b2wqTWy85yy70pY=; b=SlpVczIJK4+1H51yrIy2XZfnWYtmEO8C77COIGAPUsvrvhaEM0m8FRrKyBqnM6gFHh F3pKmsq85ALP71H/Hr7DfbZ8ERn5miX69yKlGBvznyK7Oykz4AisHBQBGcsxJcUG3e8V Y9GcKXwN2Jft4Hs79HORZFiCCnnWZdcsXFw/K5B9RrtuKxwW38YvRvETy8pZArliOfSF Iujj9qL/OF1qJg9m9Y9O8zweIiE3YhQsn0MVqk0fLSK+F84epR/kbKkAlRlnk163SPa6 gFJAQgCbFTOMEKLtMia6TzIf49M1a/iPDjXt7LlNXym4YY3YruwJ488KnrSc1wwqL85q /img== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=ID62lT7CASQ5exKZNTIxim8rPMV7b2wqTWy85yy70pY=; b=q50d8c9fa8EZ2kxzyByzNtWZ4YZ4JuwmSDD4IjC7rYKufsMniZQUXyyS8ulO6Yw8gz SdOlzjC9w4ZOfz3FDhMSFijbpsN6bXc2vhZjr61eCibblBw7fHqvaaiZpZUeN7LG01X9 +RJU3qxFzru7OpASRynmv3haXCnCfLTa3afgH8Ww+XdRGfnTd7MGlEgU+59fmBtVe/Pl 52AseiQkUFk7orHtMPFRL56NHWPV3+0UQnvQ/lH49HCXtZHnyfak6uut07yR8HL0Tpsv 9nWAqRpUyjPaUf60ghkf2J+QPCJBKMH3S2pPLAVH9PGtN+HkoJHFVLcHMTLsLORItpT5 uN0Q== X-Gm-Message-State: APjAAAW+dZfcnOPZmnFj9iRJNN14PzYCTO8ODnyq+QDpqU/Se9M3JtoX 8G50crG9Z6gCous+BSSDLlSUHQ== X-Google-Smtp-Source: APXvYqwxZtHhbIF6A9Haj7ZQVMb9g3SIesRmO9UXkoy0Zl2crMaGtC7JfWk4iUGJpTgrcq4z6Txlcw== X-Received: by 2002:a81:69d5:: with SMTP id e204mr11030566ywc.267.1554479769927; Fri, 05 Apr 2019 08:56:09 -0700 (PDT) Received: from cisco ([2601:282:901:dd7b:38ae:7ccc:265c:2d2c]) by smtp.gmail.com with ESMTPSA id z193sm7435775ywa.70.2019.04.05.08.56.04 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 05 Apr 2019 08:56:08 -0700 (PDT) Date: Fri, 5 Apr 2019 09:56:03 -0600 From: Tycho Andersen To: Andy Lutomirski Subject: Re: [RFC PATCH v9 12/13] xpfo, mm: Defer TLB flushes for non-current CPUs (x86 only) Message-ID: <20190405155603.GA12463@cisco> References: <4495dda4bfc4a06b3312cc4063915b306ecfaecb.1554248002.git.khalid.aziz@oracle.com> <91f1dbce-332e-25d1-15f6-0e9cfc8b797b@oracle.com> <26b00051-b03c-9fce-1446-52f0d6ed52f8@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Cc: Catalin Marinas , Will Deacon , Khalid Aziz , steven.sistare@oracle.com, Christoph Hellwig , Andi Kleen , aneesh.kumar@linux.ibm.com, James Morris , David Rientjes , anthony.yznaga@oracle.com, Rik van Riel , Nicholas Piggin , Mike Rapoport , Andy Lutomirski , Thomas Gleixner , Greg KH , Randy Dunlap , LKML , Souptick Joarder , Jiri Kosina , Joe Perches , arunks@codeaurora.org, Andrew Morton , "Woodhouse, David" , Mark Rutland , Keith Busch , Joao Martins , "H. Peter Anvin" , brgl@bgdev.pl, Konrad Rzeszutek Wilk , jsteckli@amazon.de, Joerg Roedel , Kees Cook , zhangshaokun@hisilicon.com, Boris Ostrovsky , chris hyser , linux-arm-kernel , Khalid Aziz , Aaron Lu , Steve Capper , James Morse , Joonsoo Kim , Mike Kravetz , Michal Hocko , Dave Hansen , alexander.h.duyck@linux.intel.com, Jonathan Corbet , Matthew Wilcox , Konstantin Khlebnikov , kanth.ghatraju@oracle.com, Huang Ying , "Paul E. McKenney" , Ben Hutchings , "Serge E. Hallyn" , Arnd Bergmann , Andrey Konovalov , Steven Rostedt , Borislav Petkov , Dan Williams , osalvador@suse.de, Ard Biesheuvel , iommu@lists.linux-foundation.org, Andrew Cooper , Logan Gunthorpe , Roman Gushchin , "Kirill A. Shutemov" , Michal Hocko , "Michael S. Tsirkin" , Peter Zijlstra , Daniel Vetter , Sebastian Andrzej Siewior , Amir Goldstein , Linux-MM , deepa.srinivasan@oracle.com, cpandya@codeaurora.org, X86 ML , yaojun8558363@gmail.com, Ingo Molnar , Jon Masters , thymovanbeers@gmail.com, Laura Abbott , pradeep.vincent@oracle.com, pavel.tatashin@microsoft.com, Jann Horn , Vlastimil Babka , Jim Mattson , Juergen Gross , marco.antonio.780@gmail.com, Juerg Haefliger , Mel Gorman , Tyler Hicks , John Haxby , LSM List , Johannes Weiner , liran.alon@oracle.com, Robin Murphy X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Message-ID: <20190405155603.3BNU-J7bS6Z8pkjRj_O5TGHRp4JdHsEgOVGPfbAoFzk@z> T24gRnJpLCBBcHIgMDUsIDIwMTkgYXQgMDk6MjQ6NTBBTSAtMDYwMCwgQW5keSBMdXRvbWlyc2tp IHdyb3RlOgo+IAo+IAo+ID4gT24gQXByIDUsIDIwMTksIGF0IDg6NDQgQU0sIERhdmUgSGFuc2Vu IDxkYXZlLmhhbnNlbkBpbnRlbC5jb20+IHdyb3RlOgo+ID4gCj4gPiBPbiA0LzUvMTkgMTI6MTcg QU0sIFRob21hcyBHbGVpeG5lciB3cm90ZToKPiA+Pj4gcHJvY2Vzcy4gSXMgdGhhdCBhbiBhY2Nl cHRhYmxlIHRyYWRlLW9mZj8KPiA+PiBZb3UgYXJlIG5vdCBzZXJpb3VzbHkgYXNraW5nIHdoZXRo ZXIgY3JlYXRpbmcgYSB1c2VyIGNvbnRyb2xsYWJsZSByZXQyZGlyCj4gPj4gYXR0YWNrIHdpbmRv dyBpcyBhIGFjY2VwdGFibGUgdHJhZGUtb2ZmPyBBcHJpbCAxc3Qgd2FzIGEgZmV3IGRheXMgYWdv Lgo+ID4gCj4gPiBXZWxsLCBsZXQncyBub3QgZm9yZ2V0IHRoYXQgdGhpcyBzZXQgYXQgbGVhc3Qg dGFrZXMgdXMgZnJvbSAiYWx3YXlzCj4gPiB2dWxuZXJhYmxlIHRvIHJldDJkaXIiIHRvIGEgY2hv aWNlIGJldHdlZW46Cj4gPiAKPiA+IDEuIGZhc3QtaXNoIGFuZCAidnVsbmVyYWJsZSB0byByZXQy ZGlyIGZvciBhIHVzZXItY29udHJvbGxhYmxlIHdpbmRvdyIKPiA+IDIuIHNsb3cgYW5kICJtaXRp Z2F0ZWQgYWdhaW5zdCByZXQyZGlyIgo+ID4gCj4gPiBTb3VuZHMgbGlrZSB3ZSBuZWVkIGEgbWVj aGFuaXNtIHRoYXQgd2lsbCBkbyB0aGUgZGVmZXJyZWQgWFBGTyBUTEIKPiA+IGZsdXNoZXMgd2hl bmV2ZXIgdGhlIGtlcm5lbCBpcyBlbnRlcmVkLCBhbmQgbm90IF9qdXN0XyBhdCBjb250ZXh0IHN3 aXRjaAo+ID4gdGltZS4gIFRoaXMgcGVybWl0cyBhbiBhcHAgdG8gcnVuIGluIHVzZXJzcGFjZSB3 aXRoIHN0YWxlIGtlcm5lbCBUTEIKPiA+IGVudHJpZXMgYXMgbG9uZyBhcyBpdCB3YW50cy4uLiB0 aGF0J3MgaGFybWxlc3MuCj4gCj4gSSBkb27igJl0IHRoaW5rIHRoaXMgaXMgZ29vZCBlbm91Z2gu IFRoZSBiYWQgZ3V5cyBjYW4gZW50ZXIgdGhlIGtlcm5lbCBhbmQgYXJyYW5nZSBmb3IgdGhlIGtl cm5lbCB0byB3YWl0LCAqaW4ga2VybmVsKiwgZm9yIGxvbmcgZW5vdWdoIHRvIHNldCB1cCB0aGUg YXR0YWNrLiAgdXNlcmZhdWx0ZmQgaXMgdGhlIG1vc3Qgb2J2aW91cyB3YXksIGJ1dCB0aGVyZSBh cmUgcGxlbnR5LiBJIHN1cHBvc2Ugd2UgY291bGQgZG8gdGhlIGZsdXNoIGF0IGNvbnRleHQgc3dp dGNoICphbmQqIGVudHJ5LiAgSSBiZXQgdGhhdCBwZXJmb3JtYW5jZSBzdGlsbCB1dHRlcmx5IHN1 Y2tzLCB0aG91Z2gg4oCUIG9uIG1hbnkgd29ya2xvYWRzLCB0aGlzIHR1cm5zIGV2ZXJ5IGVudHJ5 IGludG8gYSBmdWxsIGZsdXNoLCBhbmQgd2UgYWxyZWFkeSBrbm93IGV4YWN0bHkgaG93IG11Y2gg dGhhdCBzdWNrcyDigJQgaXTigJlzIGlkZW50aWNhbCB0byBLUFRJIHdpdGhvdXQgUENJRC4gIChB bmQgeWVzLCBpZiB3ZSBnbyB0aGlzIHJvdXRlLCB3ZSBuZWVkIHRvIG1lcmdlIHRoaXMgbG9naWMg dG9nZXRoZXIg4oCUIHdlIHNob3VsZG7igJl0IHdyaXRlIENSMyB0d2ljZSBvbiBlbnRyeSkuCj4g Cj4gSSBmZWVsIGxpa2UgdGhpcyB3aG9sZSBhcHByb2FjaCBpcyBtaXNndWlkZWQuIHJldDJkaXIg aXMgbm90IHN1Y2ggYSBnYW1lIGNoYW5nZXIgdGhhdCBmaXhpbmcgaXQgaXMgd29ydGggaHVnZSBz bG93ZG93bnMuIEkgdGhpbmsgYWxsIHRoaXMgZWZmb3J0IHNob3VsZCBiZSBzcGVudCBvbiBzb21l IGtpbmQgb2Ygc2Vuc2libGUgQ0ZJLiBGb3IgZXhhbXBsZSwgd2Ugc2hvdWxkIGJlIGFibGUgdG8g bW9zdGx5IHNxdWFzaCByZXQyYW55dGhpbmcgYnkgaW5zZXJ0aW5nIGEgY2hlY2sgdGhhdCB0aGUg aGlnaCBiaXRzIG9mIFJTUCBtYXRjaCB0aGUgdmFsdWUgb24gdGhlIHRvcCBvZiB0aGUgc3RhY2sg YmVmb3JlIGFueSBjb2RlIHRoYXQgcG9wcyBSU1AuICBPbiBhbiBGUE8gYnVpbGQsIHRoZXJlIGFy ZW7igJl0IGFsbCB0aGF0IG1hbnkgaG90IFBPUCBSU1AgaW5zdHJ1Y3Rpb25zLCBJIHRoaW5rLgo+ IAo+IChBY3R1YWxseSwgY2hlY2tpbmcgdGhlIGJpdHMgaXMgc3Vib3B0aW1hbC4gRG86Cj4gCj4g dW5zaWduZWQgbG9uZyBvZmZzZXQgPSAqcnNwIC0gcnNwOwo+IG9mZnNldCA+Pj0gVEhSRUFEX1NI SUZUOwo+IGlmICh1bmxpa2VseShvZmZzZXQpKQo+IEJVRygpOwo+IFBPUCBSU1A7CgpUaGlzIGlz IGEgbmVhdCB0cmljaywgYW5kIGRlZmluaXRlbHkgcHJldmVudHMgZ29pbmcgcmFuZG9tIHBsYWNl cyBpbgp0aGUgaGVhcC4gQnV0LAoKPiBUaGlzIG1lYW5zIHRoYXQgaXTigJlzIGFsc28gaW1wb3Nz aWJsZSB0byB0cmljayBhIGZ1bmN0aW9uIHRvIHJldHVybiBpbnRvIGEgYnVmZmVyIHRoYXQgaXMg b24gdGhhdCBmdW5jdGlvbuKAmXMgc3RhY2suKQoKV2h5IGlzIHRoaXMgdHJ1ZT8gQWxsIHlvdSdy ZSBjaGVja2luZyBpcyB0aGF0IHlvdSBjYW4ndCBzaGlmdCB0aGUKImxvY2F0aW9uIiBvZiB0aGUg c3RhY2suIElmIHlvdSBjYW4gaW5qZWN0IHN0dWZmIGludG8gYSBzdGFjayBidWZmZXIsCmNhbid0 IHlvdSBqdXN0IGluamVjdCB0aGUgcmlnaHQgZnJhbWUgdG8gcmV0dXJuIHRvIHlvdXIgY29kZSBh cyB3ZWxsLApzbyB5b3UgZG9uJ3QgaGF2ZSB0byBzaGlmdCBsb2NhdGlvbnM/CgpUaGFua3MhCgpU eWNobwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21t dSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9s aXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=