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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 C5EACC2D0DB for ; Thu, 30 Jan 2020 16:27:42 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 9DF7F206D5 for ; Thu, 30 Jan 2020 16:27:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9DF7F206D5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1ixCf1-0007Bt-CP; Thu, 30 Jan 2020 16:27:19 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1ixCez-0007Bo-Lz for xen-devel@lists.xenproject.org; Thu, 30 Jan 2020 16:27:17 +0000 X-Inumbo-ID: 60b5f434-437d-11ea-8396-bc764e2007e4 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 60b5f434-437d-11ea-8396-bc764e2007e4; Thu, 30 Jan 2020 16:27:16 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 780AAB089; Thu, 30 Jan 2020 16:27:15 +0000 (UTC) To: Paul Durrant References: <20200130145745.1306-1-pdurrant@amazon.com> <20200130145745.1306-4-pdurrant@amazon.com> From: Jan Beulich Message-ID: <3a17f9cb-124d-aedc-3bde-94b16f522089@suse.com> Date: Thu, 30 Jan 2020 17:27:00 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <20200130145745.1306-4-pdurrant@amazon.com> Content-Language: en-US Subject: Re: [Xen-devel] [PATCH v8 3/4] mm: make pages allocated with MEMF_no_refcount safe to assign X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Stefano Stabellini , Julien Grall , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , xen-devel@lists.xenproject.org, Volodymyr Babchuk , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" T24gMzAuMDEuMjAyMCAxNTo1NywgUGF1bCBEdXJyYW50IHdyb3RlOgo+IEN1cnJlbnRseSBpdCBp cyB1bnNhZmUgdG8gYXNzaWduIGEgZG9taGVhcCBwYWdlIGFsbG9jYXRlZCB3aXRoCj4gTUVNRl9u b19yZWZjb3VudCB0byBhIGRvbWFpbiBiZWNhdXNlIHRoZSBkb21haW4ndCAndG90X3BhZ2VzJyB3 aWxsIG5vdAo+IGJlIGluY3JlbWVudGVkLCBidXQgd2lsbCBiZSBkZWNyZW1lbnQgd2hlbiB0aGUg cGFnZSBpcyBmcmVlZCAoc2luY2UKPiBmcmVlX2RvbWhlYXBfcGFnZXMoKSBoYXMgbm8gd2F5IG9m IHRlbGxpbmcgdGhhdCB0aGUgaW5jcmVtZW50IHdhcyBza2lwcGVkKS4KPiAKPiBUaGlzIHBhdGNo IGFsbG9jYXRlcyBhIG5ldyAnY291bnRfaW5mbycgYml0IGZvciBhIFBHQ19leHRyYSBmbGFnCj4g d2hpY2ggaXMgdGhlbiB1c2VkIHRvIG1hcmsgcGFnZXMgd2hlbiBhbGxvY19kb21oZWFwX3BhZ2Vz KCkgaXMgY2FsbGVkCj4gd2l0aCBNRU1GX25vX3JlZmNvdW50LiBhc3NpZ25fcGFnZXMoKSBiZWNh dXNlIGl0IHN0aWxsIG5lZWRzIHRvIGNhbGwKPiBkb21haW5fYWRqdXN0X3RvdF9wYWdlcygpIHRv IG1ha2Ugc3VyZSB0aGUgZG9tYWluIGlzIGFwcHJvcHJpYXRlbHkKPiByZWZlcmVuY2VkLiBIZW5j ZSBpdCBpcyBtb2RpZmllZCB0byBkbyB0aGF0IGZvciBQR0NfZXh0cmEgcGFnZXMgZXZlbiBpZiBp dAo+IGlzIHBhc3NlZCBNRU1GX25vX3JlZm91bnQuCj4gCj4gVGhlIG51bWJlciBvZiBQR0NfZXh0 cmEgcGFnZXMgYXNzaWduZWQgdG8gYSBkb21haW4gaXMgdHJhY2tlZCBpbiBhIG5ldwo+ICdleHRy YV9wYWdlcycgY291bnRlciwgd2hpY2ggaXMgdGhlbiBzdWJ0cmFjdGVkIGZyb20gJ3RvdGFsX3Bh Z2VzJyBpbgo+IHRoZSBkb21haW5fdG90X3BhZ2VzKCkgaGVscGVyLiBUaHVzICdub3JtYWwnIHBh Z2UgYXNzaWdubWVudHMgd2lsbCBzdGlsbAo+IGJlIGFwcHJvcHJpYXRlbHkgY2hlY2tlZCBhZ2Fp bnN0ICdtYXhfcGFnZXMnLgo+IAo+IFNpZ25lZC1vZmYtYnk6IFBhdWwgRHVycmFudCA8cGR1cnJh bnRAYW1hem9uLmNvbT4KClJldmlld2VkLWJ5OiBKYW4gQmV1bGljaCA8amJldWxpY2hAc3VzZS5j b20+CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4t ZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczov L2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRldmVs