From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH v2] mm: option to _always_ scrub freed domheap pages Date: Tue, 07 May 2019 06:11:33 -0600 Message-ID: <5CD175F5020000780022C7EF@prv1-mh.provo.novell.com> References: <20190507113405.71851-1-elnikety@amazon.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hNywe-0006qh-JH for xen-devel@lists.xenproject.org; Tue, 07 May 2019 12:11:40 +0000 In-Reply-To: <20190507113405.71851-1-elnikety@amazon.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Eslam Elnikety Cc: Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Julien Grall , xen-devel , Amit Shah List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDA3LjA1LjE5IGF0IDEzOjM0LCA8ZWxuaWtldHlAYW1hem9uLmNvbT4gd3JvdGU6Cj4g LS0tIGEveGVuL2NvbW1vbi9wYWdlX2FsbG9jLmMKPiArKysgYi94ZW4vY29tbW9uL3BhZ2VfYWxs b2MuYwo+IEBAIC0yMTQsNiArMjE0LDEwIEBAIGN1c3RvbV9wYXJhbSgiYm9vdHNjcnViIiwgcGFy c2VfYm9vdHNjcnViX3BhcmFtKTsKPiAgc3RhdGljIHVuc2lnbmVkIGxvbmcgX19pbml0ZGF0YSBv cHRfYm9vdHNjcnViX2NodW5rID0gTUIoMTI4KTsKPiAgc2l6ZV9wYXJhbSgiYm9vdHNjcnViX2No dW5rIiwgb3B0X2Jvb3RzY3J1Yl9jaHVuayk7Cj4gIAo+ICsgLyogc2NydWItZG9taGVhcCAtPiBE b21oZWFwIHBhZ2VzIGFyZSBzY3J1YmJlZCB3aGVuIGZyZWVkICovCj4gK3N0YXRpYyBib29sIF9f cmVhZF9tb3N0bHkgb3B0X3NjcnViX2RvbWhlYXA7Cj4gK2Jvb2xlYW5fcGFyYW0oInNjcnViLWRv bWhlYXAiLCBvcHRfc2NydWJfZG9taGVhcCk7CgpVcG9uIDJuZCB0aG91Z2h0IHRoaXMsIGJ0dywg d291bGQgc2VlbSB0byBiZSBhbiBleGNlbGxlbnQgY2FuZGlkYXRlCmZvciBiZWNvbWluZyBhIHJ1 bnRpbWUgcGFyYW1ldGVyLgoKPiBAQCAtMjM3OCw5ICsyMzgyLDEwIEBAIHZvaWQgZnJlZV9kb21o ZWFwX3BhZ2VzKHN0cnVjdCBwYWdlX2luZm8gKnBnLCB1bnNpZ25lZCBpbnQgb3JkZXIpCj4gICAg ICAgICAgICAgIC8qCj4gICAgICAgICAgICAgICAqIE5vcm1hbGx5IHdlIGV4cGVjdCBhIGRvbWFp biB0byBjbGVhciBwYWdlcyBiZWZvcmUgZnJlZWluZyB0aGVtLAo+ICAgICAgICAgICAgICAgKiBp ZiBpdCBjYXJlcyBhYm91dCB0aGUgc2VjcmVjeSBvZiB0aGVpciBjb250ZW50cy4gSG93ZXZlciwg YWZ0ZXIKPiAtICAgICAgICAgICAgICogYSBkb21haW4gaGFzIGRpZWQgd2UgYXNzdW1lIHJlc3Bv bnNpYmlsaXR5IGZvciBlcmFzdXJlLgo+ICsgICAgICAgICAgICAgKiBhIGRvbWFpbiBoYXMgZGll ZCB3ZSBhc3N1bWUgcmVzcG9uc2liaWxpdHkgZm9yIGVyYXN1cmUuIFdlIGRvCj4gKyAgICAgICAg ICAgICAqIHNjcnViIHJlZ2FyZGxlc3MgaWYgb3B0aW9uIHNjcnViX2RvbWhlYXAgaXMgc2V0Lgo+ ICAgICAgICAgICAgICAgKi8KPiAtICAgICAgICAgICAgc2NydWIgPSBkLT5pc19keWluZyB8fCBz Y3J1Yl9kZWJ1ZzsKPiArICAgICAgICAgICAgc2NydWIgPSBkLT5pc19keWluZyB8fCBzY3J1Yl9k ZWJ1ZyB8fCBvcHRfc2NydWJfZG9taGVhcDsKCkRpZCB5b3UgY29uc2lkZXIgc2V0dGluZyBvcHRf c2NydWJfZG9taGVhcCB3aGVuIHNjcnViX2RlYnVnIGlzCnNldD8gVGhpcyB3b3VsZCBzaG9ydGVu IHRoZSAocnVudGltZSkgY2FsY3VsYXRpb24gaGVyZSBieSBhIHRpbnkgYml0LAphdCB0aGUgcHJp Y2Ugb2YgZG9pbmcgb25lIG1vcmUgdGhpbmcgb25jZSB3aGlsZSBib290aW5nLgoKSmFuCgoKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBt YWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMu eGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw= 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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 20896C004C9 for ; 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Tue, 07 May 2019 12:11:39 +0000 (UTC) Received: from INET-PRV1-MTA by prv1-mh.provo.novell.com with Novell_GroupWise; Tue, 07 May 2019 06:11:38 -0600 Message-Id: <5CD175F5020000780022C7EF@prv1-mh.provo.novell.com> X-Mailer: Novell GroupWise Internet Agent 18.1.0 Date: Tue, 07 May 2019 06:11:33 -0600 From: "Jan Beulich" To: "Eslam Elnikety" References: <20190507113405.71851-1-elnikety@amazon.com> In-Reply-To: <20190507113405.71851-1-elnikety@amazon.com> Mime-Version: 1.0 Content-Disposition: inline Subject: Re: [Xen-devel] [PATCH v2] mm: option to _always_ scrub freed domheap pages 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 , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Julien Grall , xen-devel , Amit Shah Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Message-ID: <20190507121133.3E_asuS8O9hS-Wb4J62t8QliHALE5ZreJsQaf1iMDPw@z> Pj4+IE9uIDA3LjA1LjE5IGF0IDEzOjM0LCA8ZWxuaWtldHlAYW1hem9uLmNvbT4gd3JvdGU6Cj4g LS0tIGEveGVuL2NvbW1vbi9wYWdlX2FsbG9jLmMKPiArKysgYi94ZW4vY29tbW9uL3BhZ2VfYWxs b2MuYwo+IEBAIC0yMTQsNiArMjE0LDEwIEBAIGN1c3RvbV9wYXJhbSgiYm9vdHNjcnViIiwgcGFy c2VfYm9vdHNjcnViX3BhcmFtKTsKPiAgc3RhdGljIHVuc2lnbmVkIGxvbmcgX19pbml0ZGF0YSBv cHRfYm9vdHNjcnViX2NodW5rID0gTUIoMTI4KTsKPiAgc2l6ZV9wYXJhbSgiYm9vdHNjcnViX2No dW5rIiwgb3B0X2Jvb3RzY3J1Yl9jaHVuayk7Cj4gIAo+ICsgLyogc2NydWItZG9taGVhcCAtPiBE b21oZWFwIHBhZ2VzIGFyZSBzY3J1YmJlZCB3aGVuIGZyZWVkICovCj4gK3N0YXRpYyBib29sIF9f cmVhZF9tb3N0bHkgb3B0X3NjcnViX2RvbWhlYXA7Cj4gK2Jvb2xlYW5fcGFyYW0oInNjcnViLWRv bWhlYXAiLCBvcHRfc2NydWJfZG9taGVhcCk7CgpVcG9uIDJuZCB0aG91Z2h0IHRoaXMsIGJ0dywg d291bGQgc2VlbSB0byBiZSBhbiBleGNlbGxlbnQgY2FuZGlkYXRlCmZvciBiZWNvbWluZyBhIHJ1 bnRpbWUgcGFyYW1ldGVyLgoKPiBAQCAtMjM3OCw5ICsyMzgyLDEwIEBAIHZvaWQgZnJlZV9kb21o ZWFwX3BhZ2VzKHN0cnVjdCBwYWdlX2luZm8gKnBnLCB1bnNpZ25lZCBpbnQgb3JkZXIpCj4gICAg ICAgICAgICAgIC8qCj4gICAgICAgICAgICAgICAqIE5vcm1hbGx5IHdlIGV4cGVjdCBhIGRvbWFp biB0byBjbGVhciBwYWdlcyBiZWZvcmUgZnJlZWluZyB0aGVtLAo+ICAgICAgICAgICAgICAgKiBp ZiBpdCBjYXJlcyBhYm91dCB0aGUgc2VjcmVjeSBvZiB0aGVpciBjb250ZW50cy4gSG93ZXZlciwg YWZ0ZXIKPiAtICAgICAgICAgICAgICogYSBkb21haW4gaGFzIGRpZWQgd2UgYXNzdW1lIHJlc3Bv bnNpYmlsaXR5IGZvciBlcmFzdXJlLgo+ICsgICAgICAgICAgICAgKiBhIGRvbWFpbiBoYXMgZGll ZCB3ZSBhc3N1bWUgcmVzcG9uc2liaWxpdHkgZm9yIGVyYXN1cmUuIFdlIGRvCj4gKyAgICAgICAg ICAgICAqIHNjcnViIHJlZ2FyZGxlc3MgaWYgb3B0aW9uIHNjcnViX2RvbWhlYXAgaXMgc2V0Lgo+ ICAgICAgICAgICAgICAgKi8KPiAtICAgICAgICAgICAgc2NydWIgPSBkLT5pc19keWluZyB8fCBz Y3J1Yl9kZWJ1ZzsKPiArICAgICAgICAgICAgc2NydWIgPSBkLT5pc19keWluZyB8fCBzY3J1Yl9k ZWJ1ZyB8fCBvcHRfc2NydWJfZG9taGVhcDsKCkRpZCB5b3UgY29uc2lkZXIgc2V0dGluZyBvcHRf c2NydWJfZG9taGVhcCB3aGVuIHNjcnViX2RlYnVnIGlzCnNldD8gVGhpcyB3b3VsZCBzaG9ydGVu IHRoZSAocnVudGltZSkgY2FsY3VsYXRpb24gaGVyZSBieSBhIHRpbnkgYml0LAphdCB0aGUgcHJp Y2Ugb2YgZG9pbmcgb25lIG1vcmUgdGhpbmcgb25jZSB3aGlsZSBib290aW5nLgoKSmFuCgoKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBt YWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMu eGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=