From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nai Xia Subject: Re: Is this a racing bug in page_make_sharable()? Date: Fri, 11 Jan 2013 10:46:31 +0800 Message-ID: <50EF7D07.2000601@gmail.com> References: <4F14345B.4040807@gmail.com> <20120117105323.GA74654@ocelot.phlegethon.org> <50DC6ABF.7020003@gmail.com> <20130110130058.GD99373@ocelot.phlegethon.org> <20130110172535.GI99373@ocelot.phlegethon.org> Reply-To: nai.xia@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20130110172535.GI99373@ocelot.phlegethon.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Tim Deegan Cc: Lixiuchang , Andres Lagar-Cavilla , Xiaowei Yang , "Luohao (brian)" , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org CgpPbiAyMDEz5bm0MDHmnIgxMeaXpSAwMToyNSwgVGltIERlZWdhbiB3cm90ZToKPiBBdCAxMToz NiAtMDUwMCBvbiAxMCBKYW4gKDEzNTc4MTc4MDYpLCBBbmRyZXMgTGFnYXItQ2F2aWxsYSB3cm90 ZToKPj4gSGkgdGhlcmUsIHRoYW5rcyBmb3IgdGhlIHJlcG9ydC4gU29ycnkgSSBkaWRuJ3QgcmVz cG9uZCBlYXJsaWVyLCBmZWxsIHRocm91Z2ggdGhlIGNyYWNrcy4KPj4KPj4gSGF2aW5nIHNhaWQg dGhhdC4uLgo+PiBPbiBKYW4gMTAsIDIwMTMsIGF0IDg6MDAgQU0sIFRpbSBEZWVnYW4gPHRpbUB4 ZW4ub3JnPiB3cm90ZToKPj4KPj4+IEhpLAo+Pj4KPj4+IEF0IDIzOjM1ICswODAwIG9uIDI3IERl YyAoMTM1NjY1MTMyNyksIE5haSBYaWEgd3JvdGU6Cj4+Pj4gSSB0aGluayBJIGNhbiBjb25zdHJ1 Y3QgYSBidWcgYnkgaW50ZXJsZWF2aW5nIHRoZSB0d28gY29kZSBwYXRoczoKPj4+Pgo+Pj4+IGlu IGd1ZXN0X3JlbW92ZV9wYWdlKCkgICAgICAgICAgICAgIHwgICAgICAgICAgICAgIGluIHBhZ2Vf bWFrZV9zaGFyYWJsZSgpCj4+Pj4gLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tCj4+Pj4gaWYgKCBwMm1faXNfc2hhcmVk KHAybXQpICkgICAgICAgICAgICAgICAgICAgICAgIC4uLi4uCj4+Pj4gLi4uICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC4uLi4uCj4+Pj4gcGFnZSA9IG1mbl90 b19wYWdlKG1mbik7ICAgICAgICAgICAgICAgICAgICAgICAgIC4uLi4uCj4+Pj4gICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC4uLi4uCj4+Pj4KPj4+PiAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgaWYgKAo+Pj4+ ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAhZ2V0X3Bh Z2VfYW5kX3R5cGUocGFnZSwKPj4+PiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgZCwgUEdUX3NoYXJlZF9wYWdlKSApCj4+Pj4gICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC8vIHN1Y2Nlc3MKPj4+Pgo+Pj4+ICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAuLi4uLi4uLi4K Pj4+PiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgaWYg KCBwYWdlLT5jb3VudF9pbmZvICE9Cj4+Pj4gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgIChQR0NfYWxsb2NhdGVkIHwgKDIgKwo+Pj4+ICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBleHBlY3RlZF9yZWZjbnQpKSAp IC8vCj4+Pj4gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg IGFsc28gcGFzcwo+Pj4+Cj4+Pj4KPj4+PiBpZiAoIHVubGlrZWx5KCFnZXRfcGFnZShwYWdlLCBk KSkgKQo+Pj4+Cj4+Pj4gLyogZ28gb24gdG8gcmVtb3ZlIHBhZ2UgKi8gICAgICAgICAgICAgICAg ICAgICAgIC8qIGdvIG9uIHRvIGFkZCBwYWdlIHRvCj4+Pj4gY293IGRvbWFpbiAqLwo+Pj4+IC0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0KPj4+Pgo+Pj4+Cj4+Pj4gaXMgdGhlcmUgYW55dGhpbmcgdGhhdCBj YW4gYWxyZWFkeSBwcmV2ZW50IHN1Y2ggcmFjaW5nIG9yIGlzIHRoaXMgcmVhbGx5Cj4+Pj4gY2Fu IGhhcHBlbj8KPj4+Cj4+PiBJIHRoaW5rIHRoaXMgcmFjZSBjYW4gaGFwcGVuLgo+Pgo+PiBUaHJv dWdoIGEgcDJtIGVudHJ5IGluIGEgZG9tYWluLiBJcyB0aGlzIHRoZSBzYW1lIGRvbWFpbiBhcyB0 aGUgb25lCj4+IGZvciB3aGljaCBxdWVzdF9yZW1vdmVfcGFnZSBpcyBleGVjdXRpbmc/ICBUaGVu IGFsbCBpcyBzZXJpYWxpemVkCj4+IHRocm91Z2ggdGhlIHAybSBsb2NrLCBubyByYWNlLgo+Cj4g UmlnaHQsIHRoYXQncyB3aGF0IEkgd2FzIG1pc3NpbmcuICBCZWNhdXNlIGd1ZXN0X3JlbW92ZV9w YWdlIGhhcyBjYWxsZWQKPiBnZXRfZ2ZuX3F1ZXJ5IG9uIHRoZSBnZm4sIGFuZCBub3QgeWV0IGNh bGxlZCBwdXRfZ2ZuKCksCj4gcGFnZV9tYWtlX3NoYXJhYmxlKCkgY2FuJ3QgYmUgcnVubmluZy4g IEFsbCBpcyB3ZWxsLiA6KQoKSSBzZWUuIEdvb2QgdG8gc2VlIGV2ZXJ5dGhpbmcgd29ya2luZyB3 ZWxsLiA6KQoKVGhhbmtzLAoKTmFpCgo+Cj4gVGhhbmtzLAo+Cj4gVGltLgo+Cj4KCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5n IGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcveGVuLWRl dmVsCg==