From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH v7] x86/mem-sharing: mem-sharing a range of memory Date: Tue, 19 Jul 2016 17:49:18 +0100 Message-ID: References: <1468876480-27373-1-git-send-email-tamas.lengyel@zentific.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bPYCw-0006b8-PA for xen-devel@lists.xenproject.org; Tue, 19 Jul 2016 16:49:22 +0000 In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Tamas K Lengyel Cc: George Dunlap , "xen-devel@lists.xenproject.org" , Ian Jackson , Jan Beulich List-Id: xen-devel@lists.xenproject.org T24gMTkvMDcvMTYgMTc6MjcsIFRhbWFzIEsgTGVuZ3llbCB3cm90ZToKPgo+Pj4gK3sKPj4+ICsg ICAgaW50IHJjID0gMDsKPj4+ICsgICAgc2hyX2hhbmRsZV90IHNoLCBjaDsKPj4+ICsgICAgdW5z aWduZWQgbG9uZyBzdGFydCA9Cj4+PiArICAgICAgICByYW5nZS0+X3NjcmF0Y2hzcGFjZSA/IHJh bmdlLT5fc2NyYXRjaHNwYWNlIDogcmFuZ2UtPnN0YXJ0Owo+PiBUaGlzIGNhbiBiZSBzaG9ydGVu ZWQgdG8gInVuc2lnbmVkIGxvbmcgc3RhcnQgPSByYW5nZS0+X3NjcmF0Y2hzcGFjZSA/Ogo+PiBy YW5nZS0+c3RhcnQ7IiBhbmQgZml0IG9uIGEgc2luZ2xlIGxpbmUuCj4gSSdtIG5vdCB0aGF0IGZh bWlsaWFyIHdpdGggdGhpcyBzdHlsZSBvZiB0aGUgc3ludGF4LCBkb2VzIHRoYXQgaGF2ZQo+IHRo ZSBlZmZlY3Qgb2Ygc2V0dGluZyBzdGFydCA9IF9zY3JhdGNoc3BhY2Ugd2hlbiBfc2NyYXRjaHNw YWNlIGlzIG5vdAo+IDA/CgpJdCBpcyBhIEdDQyBleHRlbnNpb24KaHR0cHM6Ly9nY2MuZ251Lm9y Zy9vbmxpbmVkb2NzL2djYy02LjEuMC9nY2MvQ29uZGl0aW9uYWxzLmh0bWwgd2hpY2gKYWxsb3dz IHlvdSB0byBvbWl0IHRoZSBtaWRkbGUgcGFyYW1ldGVyIGlmIGl0IGlzIGlkZW50aWNhbCB0byB0 aGUgZmlyc3QuCgpJdCBpcyB2ZXJ5IHVzZWZ1bCBmb3IgY2hhaW5pbmcgdG9nZXRoZXIgYSBsb2Fk IG9mIGl0ZW1zIHdoZXJlIHlvdSB3YW50CnRvIHN0b3AgYXQgdGhlIGZpcnN0IG5vbi16ZXJvIG9u ZS4KCnggPSBhID86IGIgPzogYyA/OiBkOwoKYnV0IGNhbiBhbHNvIGJlIHVzZWQgd2l0aCBmdW5j dGlvbnMgY2FsbHMgd2hpY2ggMCBzdWNjZXNzLCBub256ZXJvIGVycm9yCnNlbWFudGljczoKCnJj ID0gYSgpID86IGIoKSA/OiBjKCkgPzogZCgpOwoKSWYgeW91IGRvbid0IG5lZWQgdG8gZG8gYW55 IHNwZWNpYWwgY2xlYW51cCBpbi1iZXR3ZWVuIHRoZW0uCgo+Pj4gKyAgICAvKgo+Pj4gKyAgICAg KiBXZSBvbmx5IHByb3BhZ2F0ZSAtRU5PTUVNIGFzIGluZGl2aWR1YWwgcGFnZXMgbWF5IGZhaWwg d2l0aCAtRUlOVkFMLAo+Pj4gKyAgICAgKiBhbmQgZm9yIHJhbmdlIHNoYXJpbmcgd2Ugb25seSBj YXJlIGlmIC1FTk9NRU0gd2FzIGVuY291bnRlcmVkIHNvIHdlIHJlc2V0Cj4+PiArICAgICAqIHJj IGhlcmUuCj4+PiArICAgICAqLwo+Pj4gKyAgICBpZiAoIHJjIDwgMCAmJiByYyAhPSAtRU5PTUVN ICkKPj4gV291bGQgeW91IG1pbmQgcHV0dGluZyBpbiBhbiBBU1NFUlQocmMgPT0gLUVJTlZBTCkg aGVyZSwgaWYgd2UgYmVsaWV2ZQo+PiB0aGF0IHRvIGJlIGFuIG9rIGNhc2UgdG8gaWdub3JlPyAg SW4gdGhlIGZ1dHVyZSBpZiBtb3JlIGVycm9ycyBnZXQKPj4gcmFpc2VkLCB3ZSBkb24ndCB3YW50 IHRvIHNpbGVudGx5IGxvc2UgYSBtb3JlIHNlcmlvdXMgZXJyb3Igd2hpY2ggc2hvdWxkCj4+IGJl IHByb3BhZ2F0ZWQgdXAuCj4gV2VsbCwgaW4gdGhhdCBjYXNlIEkgY2FuIGp1c3QgY2hhbmdlIHRo ZSBpZiBzdGF0ZW1lbnQgdG8gcmMgPT0gLUVJTlZBTC4KClRoYXQgaXMgYSBtdWNoIGJldHRlciBz dWdnZXN0aW9uLgoKPj4+IEBAIC0xNDY4LDYgKzE1MjAsOTQgQEAgaW50IG1lbV9zaGFyaW5nX21l bW9wKFhFTl9HVUVTVF9IQU5ETEVfUEFSQU0oeGVuX21lbV9zaGFyaW5nX29wX3QpIGFyZykKPj4+ ICAgICAgICAgIH0KPj4+ICAgICAgICAgIGJyZWFrOwo+Pj4KPj4+ICsgICAgICAgIGNhc2UgWEVO TUVNX3NoYXJpbmdfb3BfcmFuZ2Vfc2hhcmU6Cj4+PiArICAgICAgICB7Cj4+PiArICAgICAgICAg ICAgdW5zaWduZWQgbG9uZyBtYXhfc2dmbiwgbWF4X2NnZm47Cj4+PiArICAgICAgICAgICAgc3Ry dWN0IGRvbWFpbiAqY2Q7Cj4+PiArCj4+PiArICAgICAgICAgICAgcmMgPSAtRUlOVkFMOwo+Pj4g KyAgICAgICAgICAgIGlmKCBtc28udS5yYW5nZS5fcGFkWzBdIHx8IG1zby51LnJhbmdlLl9wYWRb MV0gfHwKPj4+ICsgICAgICAgICAgICAgICAgbXNvLnUucmFuZ2UuX3BhZFsyXSApCj4+PiArICAg ICAgICAgICAgICAgIGdvdG8gb3V0Owo+Pj4gKwo+Pj4gKyAgICAgICAgICAgIC8qCj4+PiArICAg ICAgICAgICAgICogV2UgdXNlIF9zY3JhdGNoc2NhcGUgZm9yIHRoZSBoeXBlcmNhbGwgY29udGlu dWF0aW9uIHZhbHVlLgo+Pj4gKyAgICAgICAgICAgICAqIElkZWFsbHkgdGhlIHVzZXIgc2V0cyB0 aGlzIHRvIDAgaW4gdGhlIGJlZ2lubmluZyBidXQKPj4+ICsgICAgICAgICAgICAgKiB0aGVyZSBp cyBubyBnb29kIHdheSBvZiBlbmZvcmNpbmcgdGhhdCBoZXJlLCBzbyB3ZSBqdXN0IGNoZWNrCj4+ PiArICAgICAgICAgICAgICogdGhhdCBpdCdzIGF0IGxlYXN0IGluIHJhbmdlLgo+Pj4gKyAgICAg ICAgICAgICAqLwo+Pj4gKyAgICAgICAgICAgIGlmICggbXNvLnUucmFuZ2UuX3NjcmF0Y2hzcGFj ZSAmJgo+Pj4gKyAgICAgICAgICAgICAgICAobXNvLnUucmFuZ2UuX3NjcmF0Y2hzcGFjZSA8IG1z by51LnJhbmdlLnN0YXJ0IHx8Cj4+PiArICAgICAgICAgICAgICAgICBtc28udS5yYW5nZS5fc2Ny YXRjaHNwYWNlID4gbXNvLnUucmFuZ2UuZW5kKSApCj4+IEFsaWdubWVudCAoZXh0cmEgc3BhY2Up IGZvciB0aGVzZSB0d28gbGluZXMuCj4gWW91IG1lYW4gYWRkIGFuIGV4dHJhIHNwYWNlIG9yIHRo YXQgdGhlcmUgaXMgYW4gZXh0cmEgc3BhY2U/CgpQbGVhc2UgYWRkIGFuIGV4dHJhIHNwYWNlIGlu LiAgSXQgc2hvdWxkIGxvb2sgbGlrZToKCmlmICggbXNvLnUucmFuZ2UuX3NjcmF0Y2hzcGFjZSAm JgogICAgIChtc28udS5yYW5nZS5fc2NyYXRjaHNwYWNlIC4uLgogICAgICBtc28udS5yYW5nZS5f c2NyYXRjaHNwYWNlIC4uLgoKfkFuZHJldwoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==