From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Ostrovsky Subject: Re: [PATCH v5 4/8] mm: Scrub memory from idle loop Date: Sat, 22 Jul 2017 22:14:13 -0400 Message-ID: <14c29003-cdba-e03b-785a-fb4d84631d76@oracle.com> References: <1498157830-21845-1-git-send-email-boris.ostrovsky@oracle.com> <1498157830-21845-5-git-send-email-boris.ostrovsky@oracle.com> <59529D970200007800101503@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <59529D970200007800101503@prv-mh.provo.novell.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich Cc: tim@xen.org, sstabellini@kernel.org, wei.liu2@citrix.com, George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com, dario.faggioli@citrix.com, ian.jackson@eu.citrix.com, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org Cj4gCj4+IEBAIC0xMDUwLDE3ICsxMTIwLDQyIEBAIHN0YXRpYyB2b2lkIHNjcnViX2ZyZWVfcGFn ZXModW5zaWduZWQgaW50IG5vZGUpCj4+ICAgICAgICAgICAgICAgICAgICAgICAgICAgc2NydWJf b25lX3BhZ2UoJnBnW2ldKTsKPj4gICAgICAgICAgICAgICAgICAgICAgICAgICBwZ1tpXS5jb3Vu dF9pbmZvICY9IH5QR0NfbmVlZF9zY3J1YjsKPj4gICAgICAgICAgICAgICAgICAgICAgICAgICBu b2RlX25lZWRfc2NydWJbbm9kZV0tLTsKPj4gKyAgICAgICAgICAgICAgICAgICAgICAgIGNudCAr PSAxMDA7IC8qIHNjcnViYmVkIHBhZ2VzIGFkZCBoZWF2aWVyIHdlaWdodC4gKi8KPj4gKyAgICAg ICAgICAgICAgICAgICAgfQo+PiArICAgICAgICAgICAgICAgICAgICBlbHNlCj4+ICsgICAgICAg ICAgICAgICAgICAgICAgICBjbnQrKzsKPj4gKwo+PiArICAgICAgICAgICAgICAgICAgICAvKgo+ PiArICAgICAgICAgICAgICAgICAgICAgKiBTY3J1YiBhIGZldyAoOCkgcGFnZXMgYmVmb3JlIGJl Y29taW5nIGVsaWdpYmxlIGZvcgo+PiArICAgICAgICAgICAgICAgICAgICAgKiBwcmVlbXB0aW9u LiBCdXQgYWxzbyBjb3VudCBub24tc2NydWJiaW5nIGxvb3AgaXRlcmF0aW9ucwo+PiArICAgICAg ICAgICAgICAgICAgICAgKiBzbyB0aGF0IHdlIGRvbid0IGdldCBzdHVjayBoZXJlIHdpdGggYW4g YWxtb3N0IGNsZWFuCj4+ICsgICAgICAgICAgICAgICAgICAgICAqIGhlYXAuCj4+ICsgICAgICAg ICAgICAgICAgICAgICAqLwo+PiArICAgICAgICAgICAgICAgICAgICBpZiAoIGNudCA+IDgwMCAm JiBzb2Z0aXJxX3BlbmRpbmcoY3B1KSApCj4+ICsgICAgICAgICAgICAgICAgICAgIHsKPj4gKyAg ICAgICAgICAgICAgICAgICAgICAgIHByZWVtcHQgPSB0cnVlOwo+PiArICAgICAgICAgICAgICAg ICAgICAgICAgYnJlYWs7Cj4+ICAgICAgICAgICAgICAgICAgICAgICB9Cj4+ICAgICAgICAgICAg ICAgICAgIH0KPj4gICAKPj4gLSAgICAgICAgICAgICAgICBwYWdlX2xpc3RfZGVsKHBnLCAmaGVh cChub2RlLCB6b25lLCBvcmRlcikpOwo+PiAtICAgICAgICAgICAgICAgIHBhZ2VfbGlzdF9hZGRf c2NydWIocGcsIG5vZGUsIHpvbmUsIG9yZGVyLCBJTlZBTElEX0RJUlRZX0lEWCk7Cj4+ICsgICAg ICAgICAgICAgICAgaWYgKCBpID49ICgxVSA8PCBvcmRlcikgLSAxICkKPj4gKyAgICAgICAgICAg ICAgICB7Cj4+ICsgICAgICAgICAgICAgICAgICAgIHBhZ2VfbGlzdF9kZWwocGcsICZoZWFwKG5v ZGUsIHpvbmUsIG9yZGVyKSk7Cj4+ICsgICAgICAgICAgICAgICAgICAgIHBhZ2VfbGlzdF9hZGRf c2NydWIocGcsIG5vZGUsIHpvbmUsIG9yZGVyLCBJTlZBTElEX0RJUlRZX0lEWCk7Cj4+ICsgICAg ICAgICAgICAgICAgfQo+PiArICAgICAgICAgICAgICAgIGVsc2UKPj4gKyAgICAgICAgICAgICAg ICAgICAgcGctPnUuZnJlZS5maXJzdF9kaXJ0eSA9IGkgKyAxOwo+PiAgIAo+PiAtICAgICAgICAg ICAgICAgIGlmICggbm9kZV9uZWVkX3NjcnViW25vZGVdID09IDAgKQo+PiAtICAgICAgICAgICAg ICAgICAgICByZXR1cm47Cj4+ICsgICAgICAgICAgICAgICAgaWYgKCBwcmVlbXB0IHx8IChub2Rl X25lZWRfc2NydWJbbm9kZV0gPT0gMCkgKQo+PiArICAgICAgICAgICAgICAgICAgICBnb3RvIG91 dDsKPj4gICAgICAgICAgICAgICB9Cj4+ICAgICAgICAgICB9IHdoaWxlICggb3JkZXItLSAhPSAw ICk7Cj4+ICAgICAgIH0KPj4gKwo+PiArIG91dDoKPj4gKyAgICBzcGluX3VubG9jaygmaGVhcF9s b2NrKTsKPj4gKyAgICBub2RlX2NsZWFyKG5vZGUsIG5vZGVfc2NydWJiaW5nKTsKPj4gKyAgICBy ZXR1cm4gc29mdGlycV9wZW5kaW5nKGNwdSkgfHwgKG5vZGVfdG9fc2NydWIoZmFsc2UpICE9IE5V TUFfTk9fTk9ERSk7Cj4gCj4gV2hpbGUgSSBjYW4gc2VlIHdoeSB5b3UgdXNlIGl0IGhlcmUsIHRo ZSBzb2Z0aXJxX3BlbmRpbmcoKSBsb29rcyBzb3J0IG9mCj4gbWlzcGxhY2VkOiBXaGlsZSBpbnZv a2luZyBpdCB0d2ljZSBpbiB0aGUgY2FsbGVyIHdpbGwgbG9vayBhIGxpdHRsZSBvZGQgdG9vLAo+ IEkgc3RpbGwgdGhpbmsgdGhhdCdzIHdoZXJlIHRoZSBjaGVjayBiZWxvbmdzLgoKCnNjcnViX2Zy ZWVfcGFnZXMgaXMgY2FsbGVkIGZyb20gaWRsZSBsb29wIGFzCgoJZWxzZSBpZiAoICFzb2Z0aXJx X3BlbmRpbmcoY3B1KSAmJiAhc2NydWJfZnJlZV9wYWdlcygpICkKICAgICAgICAgICAgIHBtX2lk bGUoKTsKCnNvIHNvZnRpcnFfcGVuZGluZygpIGlzIHVubmVjZXNzYXJ5IGhlcmUuCgooTm90IHN1 cmUgd2h5IHlvdSBhcmUgc2F5aW5nIGl0IHdvdWxkIGJlIGludm9rZWQgdHdpY2UpCgotYm9yaXMK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZl bCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4u b3JnL3hlbi1kZXZlbAo=