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d="scan'208";a="4591279" Date: Thu, 22 Aug 2019 12:17:30 +0100 From: Anthony PERARD To: Paul Durrant Message-ID: <20190822111730.GK1289@perard.uk.xensource.com> References: <20190821092020.17952-1-anthony.perard@citrix.com> <20190821092020.17952-3-anthony.perard@citrix.com> <703d5a46d4c74eb4afd93d76b7341efc@AMSPEX02CL03.citrite.net> <20190822102132.GJ1289@perard.uk.xensource.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Subject: Re: [Xen-devel] [PATCH 2/2] xen-bus: Avoid rewriting identical values to xenstore 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: "xen-devel@lists.xenproject.org" , Stefano Stabellini , "qemu-devel@nongnu.org" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" T24gVGh1LCBBdWcgMjIsIDIwMTkgYXQgMTE6MzY6MzJBTSArMDEwMCwgUGF1bCBEdXJyYW50IHdy b3RlOgo+IEJ1dCwgbm93IEkgbG9vayBhdCB0aGUgY29kZSBhZ2FpbiB3aXRob3V0IHlvdXIgcGF0 Y2ggYXBwbGllZCBJIGRvbid0IGFjdHVhbGx5IHNlZSB0aGUgcHJvYmxlbSBpdCBpcyB0cnlpbmcg dG8gZml4LiBUaGUgZnVuY3Rpb25zIHhlbl9kZXZpY2VfW2JhY2t8ZnJvbnRdZW5kX3NldF9zdGF0 ZSByZXR1cm4gZWFybHkgaWYgdGhlIHN0YXRlIGJlaW5nIHNldCBtYXRjaGVzIHRoZSBleGlzdGlu ZyBzdGF0ZSBhbmQgaGVuY2UgbmV2ZXIgZ2V0IHRvIHRoZSBsaW5lIHdoZXJlIHRoZSBzdGF0ZSBp cyB3cml0dGVuIHRvIHhlbnN0b3JlLgoKTGV0J3Mgc2VlOgogICAgKiBzdGVwIDEgKGluaXRpYWwg c3RhdGVzIGluIHhlbnN0b3JlIGFuZCBRRU1VKQogICAgICAgIHhlbnN0b3JlL2Zyb250ZW5kL3N0 YXRlID0gNAogICAgICAgIHhlbmRldi0+ZnJvbnRlbmRfc3RhdGUgPSA0CiAgICAqIHN0ZXAgMiAo ZnJvbnRlbmQgY2hhbmdlcyBzdGF0ZSBpbiB4ZW5zdG9yZSkKICAgICAgICB4ZW5zdG9yZS9mcm9u dGVuZC9zdGF0ZSA9IDUKICAgICogc3RlcCAzICh3YXRjaCBldmVudCByZWNlaXZlZCBieSBRRU1V KQogICAgICAgIHhlbl9kZXZpY2VfZnJvbnRlbmRfY2hhbmdlZCgpCiAgICAgICAgICAgIHN0YXRl ID0gcmVhZCh4ZW5zdG9yZS9mcm9udGVuZC9zdGF0ZSkgKHN0YXRlPTUpCiAgICAgICAgICAgIHhl bl9kZXZpY2VfZnJvbnRlbmRfc2V0X3N0YXRlKHN0YXRlKQogICAgICAgICAgICAgICAgeGVuZGV2 LT5mcm9udGVuZF9zdGF0ZSAhPSBzdGF0ZSAgKDQhPTUpCiAgICAgICAgICAgICAgICAgICAgeGVu ZGV2LT5mcm9udGVuZF9zdGF0ZSA9IHN0YXRlCiAgICAgICAgICAgICAgICAgICAgeGVuc3RvcmUv ZnJvbnRlbmQvc3RhdGUgPSBzdGF0ZQogICAgKiBzdGVwIDQKICAgICAgICAjIHdhdGNoIGV2ZW50 IHRyaWdnZXJzIHhlbl9kZXZpY2VfZnJvbnRlbmRfY2hhbmdlZCgpIGFnYWluIGJ1dAogICAgICAg ICMgdGhpcyB0aW1lIHhlbmRldi0+ZnJvbnRlbmRfc3RhdGUgPT0geGVuc3RvcmUvZnJvbnRlbmRf c3RhdGUKClRoaXMgaXMgaG93IFFFTVUgd3JpdGVzIHRvIHhlbnN0b3JlIGFuIGlkZW50aWNhbCB2 YWx1ZS4KClRoYXQgYmVoYXZpb3IgbWlnaHQgYmUgYW4gaXNzdWUgaWYgdGhlIGZyb250ZW5kIGNo YW5nZXMgdGhlIHZhbHVlIGFmdGVyClFFTVUgaGF2ZSByZWFkIGl0IGJ1dCBiZWZvcmUgUUVNVSB3 cml0ZXMgaXQgYWdhaW4uCgpBbHNvLCBpdCdzIG5pY2UgdG8gYXZvaWQgZXh0cmEgd29yay4KCi0t IApBbnRob255IFBFUkFSRAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVj dC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1k ZXZlbA==