From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Ostrovsky Subject: Re: [PATCH v3 3/9] mm: Scrub pages in alloc_heap_pages() if needed Date: Thu, 4 May 2017 11:04:48 -0400 Message-ID: <0cbe45b7-4457-2f91-c8c8-0da282e0c2c7@oracle.com> References: <1492184258-3277-1-git-send-email-boris.ostrovsky@oracle.com> <1492184258-3277-4-git-send-email-boris.ostrovsky@oracle.com> <590B5A7C0200007800156D9B@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <590B5A7C0200007800156D9B@prv-mh.provo.novell.com> 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, ian.jackson@eu.citrix.com, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gMDUvMDQvMjAxNyAxMDo0NCBBTSwgSmFuIEJldWxpY2ggd3JvdGU6Cj4+Pj4gT24gMTQuMDQu MTcgYXQgMTc6MzcsIDxib3Jpcy5vc3Ryb3Zza3lAb3JhY2xlLmNvbT4gd3JvdGU6Cj4+IFdoZW4g YWxsb2NhdGluZyBwYWdlcyBpbiBhbGxvY19oZWFwX3BhZ2VzKCkgZmlyc3QgbG9vayBmb3IgY2xl YW4gcGFnZXMuCj4gQXMgZXhwcmVzc2VkIGJlZm9yZSwgdGhlcmUgYXJlIGNhc2VzIHdoZW4gd2Ug ZG9uJ3QgcmVhbGx5IG5lZWQKPiBzY3J1YmJlZCBwYWdlcy4gSGVuY2UgdGhlIGxvY2FsIHZhcmlh YmxlICJ1c2VfdW5zY3J1YmJlZCIgYmVsb3cKPiBzaG91bGQgcmVhbGx5IGJlIHNvbWUgZm9ybSBv ZiBpbnB1dCB0byBhbGxvY19oZWFwX3BhZ2VzKCkuCgpUaGF0IHdvdWxkIGJlIGFsbG9jX3hlbmhl YXBfcGFnZXMoKSBvbmx5LCBpbiB3aGljaCBjYXNlIGNhbiBJIGp1c3QKaW5pdGlhbGl6ZSB0aGUg c3RpbGwgbG9jYWwgdXNlX3Vuc2NydWJiZWQKYXMKICAgIHVzZV91bnNjcnViYmVkID0gKHpvbmVf bG8gPT0gTUVNWk9ORV9YRU4pCgpPciBkbyB5b3UgcHJlZmVyIHRoaXMgdG8gYmUgZXhwbGljaXQ/ Cgo+Cj4+IC0tLSBhL3hlbi9jb21tb24vcGFnZV9hbGxvYy5jCj4+ICsrKyBiL3hlbi9jb21tb24v cGFnZV9hbGxvYy5jCj4+IEBAIC03MDAsMzQgKzcwMCwxNyBAQCBzdGF0aWMgc3RydWN0IHBhZ2Vf aW5mbyAqYWxsb2NfaGVhcF9wYWdlcygKPj4gICAgICB1bnNpZ25lZCBpbnQgb3JkZXIsIHVuc2ln bmVkIGludCBtZW1mbGFncywKPj4gICAgICBzdHJ1Y3QgZG9tYWluICpkKQo+PiAgewo+PiAtICAg IHVuc2lnbmVkIGludCBpLCBqLCB6b25lID0gMCwgbm9kZW1hc2tfcmV0cnkgPSAwOwo+PiAtICAg IG5vZGVpZF90IGZpcnN0X25vZGUsIG5vZGUgPSBNRU1GX2dldF9ub2RlKG1lbWZsYWdzKSwgcmVx X25vZGUgPSBub2RlOwo+PiArICAgIHVuc2lnbmVkIGludCBpLCBqLCB6b25lLCBub2RlbWFza19y ZXRyeTsKPj4gKyAgICBub2RlaWRfdCBmaXJzdF9ub2RlLCBub2RlLCByZXFfbm9kZTsKPj4gICAg ICB1bnNpZ25lZCBsb25nIHJlcXVlc3QgPSAxVUwgPDwgb3JkZXI7Cj4+ICAgICAgc3RydWN0IHBh Z2VfaW5mbyAqcGc7Cj4+IC0gICAgbm9kZW1hc2tfdCBub2RlbWFzayA9IChkICE9IE5VTEwgKSA/ IGQtPm5vZGVfYWZmaW5pdHkgOiBub2RlX29ubGluZV9tYXA7Cj4+IC0gICAgYm9vbF90IG5lZWRf dGxiZmx1c2ggPSAwOwo+PiArICAgIG5vZGVtYXNrX3Qgbm9kZW1hc2s7Cj4+ICsgICAgYm9vbCBu ZWVkX3NjcnViLCBuZWVkX3RsYmZsdXNoID0gZmFsc2UsIHVzZV91bnNjcnViYmVkID0gZmFsc2U7 Cj4+ICAgICAgdWludDMyX3QgdGxiZmx1c2hfdGltZXN0YW1wID0gMDsKPj4gIAo+PiAgICAgIC8q IE1ha2Ugc3VyZSB0aGVyZSBhcmUgZW5vdWdoIGJpdHMgaW4gbWVtZmxhZ3MgZm9yIG5vZGVJRC4g Ki8KPj4gICAgICBCVUlMRF9CVUdfT04oKF9NRU1GX2JpdHMgLSBfTUVNRl9ub2RlKSA8ICg4ICog c2l6ZW9mKG5vZGVpZF90KSkpOwo+PiAgCj4+IC0gICAgaWYgKCBub2RlID09IE5VTUFfTk9fTk9E RSApCj4+IC0gICAgewo+PiAtICAgICAgICBpZiAoIGQgIT0gTlVMTCApCj4+IC0gICAgICAgIHsK Pj4gLSAgICAgICAgICAgIG5vZGUgPSBuZXh0X25vZGUoZC0+bGFzdF9hbGxvY19ub2RlLCBub2Rl bWFzayk7Cj4+IC0gICAgICAgICAgICBpZiAoIG5vZGUgPj0gTUFYX05VTU5PREVTICkKPj4gLSAg ICAgICAgICAgICAgICBub2RlID0gZmlyc3Rfbm9kZShub2RlbWFzayk7Cj4+IC0gICAgICAgIH0K Pj4gLSAgICAgICAgaWYgKCBub2RlID49IE1BWF9OVU1OT0RFUyApCj4+IC0gICAgICAgICAgICBu b2RlID0gY3B1X3RvX25vZGUoc21wX3Byb2Nlc3Nvcl9pZCgpKTsKPj4gLSAgICB9Cj4+IC0gICAg Zmlyc3Rfbm9kZSA9IG5vZGU7Cj4+IC0KPj4gLSAgICBBU1NFUlQobm9kZSA8IE1BWF9OVU1OT0RF Uyk7Cj4+IC0gICAgQVNTRVJUKHpvbmVfbG8gPD0gem9uZV9oaSk7Cj4+IC0gICAgQVNTRVJUKHpv bmVfaGkgPCBOUl9aT05FUyk7Cj4gVGhlIGxhc3QgdHdvIGNhbiByZW1haW4gd2hlcmUgdGhleSBh cmUgKGJ1dCBzZWUgYWxzbyBiZWxvdykuCj4KPj4gQEAgLTc1NCw2ICs3NDAsMjggQEAgc3RhdGlj IHN0cnVjdCBwYWdlX2luZm8gKmFsbG9jX2hlYXBfcGFnZXMoCj4+ICAgICAgICAgICB0bWVtX2Zy ZWVhYmxlX3BhZ2VzKCkgKQo+PiAgICAgICAgICBnb3RvIHRyeV90bWVtOwo+PiAgCj4+ICsgYWdh aW46Cj4gSXMgdGhlcmUgYW55IGhvcGUgdG8gZ2V0IGF3YXkgd2l0aG91dCBzdWNoIGFuIHVnbHkg cHNldWRvIGxvb3A/Cj4gRS5nLiBieSBtYWtpbmcgdGhpcyBmdW5jdGlvbiBhIGhlbHBlciBmdW5j dGlvbiBvZiBhIHJlbGF0aXZlbHkgdGhpbgo+IHdyYXBwZXIgbmFtZWQgYWxsb2NfaGVhcF9wYWdl cygpLCBpbnZva2luZyB0aGlzIGhlbHBlciB0d2ljZQo+IHVubGVzcyB1c2VfdW5zY3J1YmJlZCBp cyB0cnVlIChhcyBzYWlkLCB0aGlzIG91Z2h0IHRvIGJlIGFuIGlucHV0KT8KCgpPSywgbGV0IG1l IHNlZSBpZiBJIGNhbiBiZWF1dGlmeSB0aGlzLgoKCi1ib3JpcwoKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4t ZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==