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Wed, 02 Oct 2019 01:59:31 -0700 (PDT) MIME-Version: 1.0 References: <20191001151159.861-1-paul.durrant@citrix.com> <2857a023-87ed-8220-7b22-51f1048f9de6@suse.com> In-Reply-To: <2857a023-87ed-8220-7b22-51f1048f9de6@suse.com> From: Paul Durrant Date: Wed, 2 Oct 2019 09:59:18 +0100 Message-ID: To: Jan Beulich Subject: Re: [Xen-devel] [PATCH-for-4.13 v2] x86/mm: don't needlessly veto migration 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: Juergen Gross , Wei Liu , George Dunlap , Andrew Cooper , Paul Durrant , xen-devel , =?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" T24gV2VkLCAyIE9jdCAyMDE5IGF0IDA5OjQyLCBKYW4gQmV1bGljaCA8amJldWxpY2hAc3VzZS5j b20+IHdyb3RlOgo+Cj4gT24gMDEuMTAuMjAxOSAxNzoxMSwgUGF1bCBEdXJyYW50IHdyb3RlOgo+ ID4gTm93IHRoYXQgeGwuY2ZnIGhhcyBhbiBvcHRpb24gdG8gZXhwbGljaXRseSBlbmFibGUgSU9N TVUgbWFwcGluZ3MgZm9yIGEKPiA+IGRvbWFpbiwgbWlncmF0aW9uIG1heSBiZSBuZWVkbGVzc2x5 IHZldG9lZCBkdWUgdG8gdGhlIGNoZWNrIG9mCj4gPiBpc19pb21tdV9lbmFibGVkKCkgaW4gcGFn aW5nX2xvZ19kaXJ0eV9lbmFibGUoKS4KPiA+IFRoZXJlIGlzIGFjdHVhbGx5IG5vIG5lZWQgdG8g cHJldmVudCBsb2dkaXJ0eSBmcm9tIGJlaW5nIGVuYWJsZWQgdW5sZXNzCj4gPiBkZXZpY2VzIGFy ZSBhc3NpZ25lZCB0byBhIGRvbWFpbiBhbmQgdGhhdCBkb21haW4gaXMgc2hhcmluZyBIQVAgbWFw cGluZ3MKPiA+IHdpdGggdGhlIElPTU1VIChpbiB3aGljaCBjYXNlIGRpc2FibGluZyB3cml0ZSBw ZXJtaXNzaW9ucyBpbiB0aGUgUDJNIG1heQo+ID4gY2F1c2UgRE1BIGZhdWx0cykuIEl0IGlzIHF1 aXRlIHBvc3NpYmxlIHRoYXQgc29tZSBhc3NpZ25lZCBkZXZpY2VzIG1heQo+ID4gcHJvdmlkZSBp bmZvcm1hdGlvbiBhYm91dCB3aGljaCBwYWdlcyBtYXkgaGF2ZSBiZWVuIGRpcnRpZWQgYnkgRE1B IHZpYQo+ID4gYW4gQVBJIGV4cG9ydGVkIGJ5IHRoZWlyIG1hbmFnaW5nIGVtdWxhdG9yLiBUaHVz IFhlbidzIGxvZ2RpcnR5IG1hcCBpcyBvbmx5Cj4gPiBvbmUgc291cmNlIG9mIGluZm9ybWF0aW9u IHRoYXQgbWF5IGJlIGF2YWlsYWJsZSB0byB0aGUgdG9vbHN0YWNrIHdoZW4KPiA+IHBlcmZvcm1p bmcgYSBtaWdyYXRpb24gYW5kIGhlbmNlIGl0IGlzIHRoZSB0b29sc3RhY2sgdGhhdCBpcyBiZXN0 IHBsYWNlZAo+ID4gdG8gZGVjaWRlIHVuZGVyIHdoYXQgY2lyY3Vtc3RhbmNlcyBpdCBjYW4gYmUg cGVyZm9ybWVkLCBub3QgdGhlIGh5cGVydmlzb3IuCj4KPiBXaGlsZSBJJ20gaGFwcHkgYWJvdXQg dGhlIGV4dGVuZGVkIGRlc2NyaXB0aW9uLCBpdCdzIHN0aWxsIHdyaXR0ZW4gaW4KPiBhIHdheSBz dWdnZXN0aW5nIHRoYXQgdGhpcyBpcyB0aGUgb25seSBwb3NzaWJsZSB3YXkgb2Ygdmlld2luZyB0 aGluZ3MuCj4gQXMgZXhwcmVzc2VkIGJ5IEdlb3JnZSBhbmQgbWUsIHB1dHRpbmcgdGhlIGh5cGVy dmlzb3IgaW4gYSBwb3NpdGlvbiB0bwo+IGJlIGFibGUgdG8ganVkZ2UgaXMgYXQgbGVhc3QgYW4g YWx0ZXJuYXRpdmUgd29ydGggY29uc2lkZXJpbmcuCj4KClRoaXMgaXMgYSBzbWFsbCBwYXRjaCBh bmQgaXQgZG9lcyBub3QgY2xvc2UgdGhlIGRvb3Igb24gYmVpbmcgYWJsZSB0bwphZGQgc3VjaCBh biBpbnRlcmZhY2UgbGF0ZXIuIEknbSBub3Qgc2F5aW5nIHRoYXQgSSBkaXNsaWtlIHRoYXQKYWx0 ZXJuYXRpdmUsIGJ1dCBpdCB3aWxsIGluZXZpdGFibHkgYmUgcXVpdGUgYSBsb3QgbW9yZSBjb2Rl IGFuZCBJJ20Kbm90IHN1cmUgaXQgcmVhbGx5IGJ1eXMgYW55dGhpbmcuCgo+IFdoYXQncyB3b3Jz ZSB0aG91Z2ggLSB5b3UgZG9uJ3QgZ28gYWxsIHRoZSB3YXkgdG8gdGhlIGVuZCBvZiB3aGF0IHlv dXIKPiBhcmd1bWVudGF0aW9uIHdvdWxkIGxlYWQgdG86IFRoZXJlJ3Mgbm8gcmVhc29uIGZvciBY ZW4gdG8gdmV0byB0aGUKPiByZXF1ZXN0IHRoZW4gZXZlbiBpbiB0aGUgc2hhcmVkIHBhZ2UgdGFi bGUgY2FzZS4KCldlbGwsIEkgYWRkcmVzcyB0aGF0IGluIHRoZSBjb21taXQgY29tbWVudC4KCj4g VGhlIG9ubHkgZGV2aWNlCj4gYXNzaWduZWQgdG8gYSBndWVzdCBpbiBxdWVzdGlvbiBtYXkgYmUg ZG9pbmcgRE1BIHJlYWRzIG9ubHkuIEZvbGxvd2luZwo+IHlvdXIgcmVhc29uaW5nLCBYZW4gc2hv dWxkbid0IGJlIGdldHRpbmcgaW4gdGhlIHdheSB0aGVuIGVpdGhlci4gT25jZQo+IGFnYWluIHRo ZSBzaXR1YXRpb24gY291bGQgYmUgdGFrZW4gY2FyZSBvZiBieSBpbmZvcm1pbmcgWGVuIGFib3V0 IHRoaXMKPiBwcm9wZXJ0eSBvZiBhIGRldmljZSAoYXNzdW1pbmcgaXQgY2FuJ3QgdGVsbCBhbGwg YnkgaXRzZWxmKS4KCkkgYW0gbm90IGF3YXJlIG9mIGEgbWVjaGFuc2ltIHRvIGNvbmZpZ3VyZSBl dmVuIGEgUENJIGV4cHJlc3MgZGV2aWNlCnRvIG9ubHkgYWxsb3cgcmVhZCBUTFBzIGFuZCB0aHVz IHdlIG11c3QgYXNzdW1lIHRoYXQgYW55IGRldmljZSB3aXRoCmJ1cyBtYXN0ZXJpbmcgZW5hYmxl ZCBtYXkgYXR0ZW1wdCB0byBpc3N1ZSBhIHdyaXRlIFRMUC4gVGh1cyBJIHRoaW5rCml0IGlzIHJl YXNvbmFibGUgZm9yIFhlbiB0byB2ZXRvIGxvZ2RpcnR5IGluIHRoZSBjYXNlIG9mIHNoYXJlZCBF UFQKYmVjYXVzZSBhIHNpZGUgZWZmZWN0IG9mIFhlbidzIGJlaGF2aW91ciBtYXkgaGF2ZSBkZXRy aW1lbnRhbCBhZmZlY3QKb24gZGV2aWNlIGZ1bmN0aW9uYWxpdHksIGFuZCBjYXVzZSBidXMgZXJy b3JzIHRvIGJlIHJlcG9ydGVkLiBJIGd1ZXNzCml0IHdvdWxkIGJlIHJlYXNvbmFibGUgdG8gY2hl Y2sgYWxsIGFzc2lnbmVkIGRldmljZXMnIEJNRSBiaXQgYW5kIG9ubHkKdmV0byBpZiBhbnkgYXJl IHNldCB0aG91Z2guIEkgd291bGQgcHJlZmVyIHRoYXQgYmUgYW4gaW5jcmVtZW50YWwKcGF0Y2gg dGhvdWdoLgoKICBQYXVsCgo+Cj4gSmFuCj4KPiBfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwo+IFhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKPiBYZW4tZGV2ZWxA bGlzdHMueGVucHJvamVjdC5vcmcKPiBodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxt YW4vbGlzdGluZm8veGVuLWRldmVsCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5w cm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8v eGVuLWRldmVs