From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH v3 2/2] IOMMU/spinlock: Make the pcidevs_lock a recursive one Date: Thu, 10 Mar 2016 06:06:28 -0700 Message-ID: <56E17F6402000078000DB430@prv-mh.provo.novell.com> References: <1457529455-38314-1-git-send-email-quan.xu@intel.com> <1457529455-38314-3-git-send-email-quan.xu@intel.com> <56E1520002000078000DB243@prv-mh.provo.novell.com> <945CA011AD5F084CBEA3E851C0AB28894B85FEB3@SHSMSX101.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <945CA011AD5F084CBEA3E851C0AB28894B85FEB3@SHSMSX101.ccr.corp.intel.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Quan Xu Cc: Kevin Tian , Feng Wu , Andrew Cooper , Dario Faggioli , "xen-devel@lists.xen.org" , Suravee Suthikulpanit , Keir Fraser List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDEwLjAzLjE2IGF0IDEyOjI3LCA8cXVhbi54dUBpbnRlbC5jb20+IHdyb3RlOgo+IE9u IE1hcmNoIDEwLCAyMDE2IDU6NTNwbSwgPE1hcmNoIDEwLCAyMDE2IDU6NTM+IHdyb3RlOgo+PiA+ Pj4gT24gMDkuMDMuMTYgYXQgMTQ6MTcsIDxxdWFuLnh1QGludGVsLmNvbT4gd3JvdGU6Cj4+ID4g U2lnbmVkLW9mZi1ieTogUXVhbiBYdSA8cXVhbi54dUBpbnRlbC5jb20+Cj4+ID4gQWNrZWQtYnk6 IEtldmluIFRpYW4gPGtldmluLnRpYW5AaW50ZWwuY29tPgo+PiAKPj4gVGhlIHBhdGNoIGl0c2Vs ZiBsb29rcyBtb3N0bHkgZmluZSBub3cgKHNlZSBiZWxvdyBmb3IgdGhlIG1pbm9yIGxlZnQgCj4g aXNzdWVzKSwgYnV0Cj4+IHRoZSBjb21wbGV0ZSBsYWNrIG9mIGEgZGVzY3JpcHRpb24gKHdoaWNo IHNob3VsZCBzdGF0ZSB3aHkgdGhpcyBjaGFuZ2UgaXMgCj4gYmVpbmcKPj4gZG9uZSkgbWFrZXMg dGhpcyBub3QgcmVhZHkgdG8gZ28gaW4gYW55d2F5Lgo+PiAKPiAKPiBXaGF0IGFib3V0IHRoZSBm b2xsb3dpbmcgZGVzY3JpcHRpb246Cj4gLS0KPiBUaGUgcGNpZGV2c19sb2NrIG1heSBiZSByZWN1 cnNpdmVseSB0YWtlbiBmb3IgaGlkaW5nIEFUUyBkZXZpY2UsCj4gd2hlbiBWVC1kIERldmljZS1U TEIgZmx1c2ggdGltZWQgb3V0LgoKcy9tYXkvaXMgZ29pbmcgdG8vIChzaW5jZSByaWdodCBub3cg dGhhdCBpc24ndCB0aGUgY2FzZSB5ZXQpCgo+PiA+IC0tLSBhL3hlbi9kcml2ZXJzL3Bhc3N0aHJv dWdoL3BjaS5jCj4+ID4gKysrIGIveGVuL2RyaXZlcnMvcGFzc3Rocm91Z2gvcGNpLmMKPj4gPiBA QCAtNDgsNyArNDgsNyBAQCBzdHJ1Y3QgcGNpX3NlZyB7Cj4+ID4gICAgICB9IGJ1czJicmlkZ2Vb TUFYX0JVU0VTXTsKPj4gPiAgfTsKPj4gPgo+PiA+IC1zcGlubG9ja190IHBjaWRldnNfbG9jayA9 IFNQSU5fTE9DS19VTkxPQ0tFRDsKPj4gPiArc3RhdGljIHNwaW5sb2NrX3QgX3BjaWRldnNfbG9j ayA9IFNQSU5fTE9DS19VTkxPQ0tFRDsKPj4gCj4+IFdoeSB0aGUgcmVuYW1pbmc/Cj4+IAo+IAo+ IFRoZSBvcmlnaW5hbCBuYW1lIHdvdWxkIGNhdXNlIGNvbXBpbGVyIGVycm9ycywgYXMgSSBhbHNv IGludHJvZHVjZSBhIG5ldyAKPiBoZWxwZXIgd2l0aCBzYW1lIG5hbWUgLS0gdm9pZCBwY2lkZXZz X2xvY2sodm9pZCkuCgpBaCwgb2YgY291cnNlLgoKPj4gPiBAQCAtMTAzLDYgKzEwMywyNiBAQCBz dGF0aWMgaW50IHBjaV9zZWdtZW50c19pdGVyYXRlKAo+PiA+ICAgICAgcmV0dXJuIHJjOwo+PiA+ ICB9Cj4+ID4KPj4gPiArdm9pZCBwY2lkZXZzX2xvY2sodm9pZCkKPj4gPiArewo+PiA+ICsgICAg c3Bpbl9sb2NrX3JlY3Vyc2l2ZSgmX3BjaWRldnNfbG9jayk7Cj4+ID4gK30KPj4gPiArCj4+ID4g K3ZvaWQgcGNpZGV2c191bmxvY2sodm9pZCkKPj4gPiArewo+PiA+ICsgICAgc3Bpbl91bmxvY2tf cmVjdXJzaXZlKCZfcGNpZGV2c19sb2NrKTsKPj4gPiArfQo+PiA+ICsKPj4gPiAraW50IHBjaWRl dnNfaXNfbG9ja2VkKHZvaWQpCj4+IAo+PiBib29sX3QKPj4gCj4+ID4gK3sKPj4gPiArICAgIHJl dHVybiBzcGluX2lzX2xvY2tlZCgmX3BjaWRldnNfbG9jayk7IH0KPj4gPiArCj4+ID4gK2ludCBw Y2lkZXZzX3RyeWxvY2sodm9pZCkKPj4gCj4+IGJvb2xfdAo+PiAKPj4gKFRvIGF2b2lkIGFub3Ro ZXIgcm91bmQsIHBsZWFzZSBiZSBhd2FyZSB0aGF0IHRoZSB1bmRlcmx5aW5nIHNwaW4gbG9jawo+ PiBwcmltaXRpdmVzIHN0aWxsIFt3cm9uZ2x5XSB1c2UgImludCIsIHNvIHRvIGJlIGZ1bGx5IGNv cnJlY3QgeW91IHdpbGwgbmVlZCAKPiB0byB1c2UgISEgaW4KPj4gYm90aCByZXR1cm4gc3RhdGVt ZW50cywgdW5sZXNzIHlvdSBmZWVsIGxpa2UgKGluIGFub3RoZXIgcHJlcmVxIHBhdGNoKSB0byAK PiBhZGp1c3QKPj4gdGhvc2UgcHJpbWl0aXZlcyB0b28uCj4+IAo+IFRoYW5rcyBmb3IgcmVtaW5k aW5nLgo+IEknZCBwcmVmZXIgdG8gdXNlICEhIGluIGJvdGggcmV0dXJuIHN0YXRlbWVudHMuCj4g YnR3LCBjb3VsZCB5b3UgaGVscCBtZSBjaGVjayB0aGUgY29kZSBzdHlsZT86Cj4gCj4gK2Jvb2xf dCBwY2lkZXZzX2lzX2xvY2tlZCh2b2lkKQo+ICt7Cj4gKyAgICByZXR1cm4gISEoc3Bpbl9pc19s b2NrZWQoJl9wY2lkZXZzX2xvY2spKTsKPiArfQo+ICsKPiArYm9vbF90IHBjaWRldnNfdHJ5bG9j ayh2b2lkKQo+ICt7Cj4gKyAgICByZXR1cm4gISEoc3Bpbl90cnlsb2NrX3JlY3Vyc2l2ZSgmX3Bj aWRldnNfbG9jaykpOwo+ICt9Cj4gCj4gSXMgaXQgcmlnaHQ/CgpUaGUgb3V0ZXJtb3N0IHBhcmVu dGhlc2VzIGFyZW4ndCBuZWVkZWQsIGFuZCBoYXJtIHJlYWRhYmlsaXR5LgoKSmFuCgoKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxp bmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4t ZGV2ZWwK