From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Durrant Subject: Re: [PATCH v2] xen-platform: separate unplugging of NVMe disks Date: Fri, 24 Mar 2017 09:05:31 +0000 Message-ID: <8c8207cf4d7e4aa1ab5181879aebf873@AMSPEX02CL03.citrite.net> References: <1490264111-25273-1-git-send-email-paul.durrant@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1crLA5-0000We-Pk for xen-devel@lists.xenproject.org; Fri, 24 Mar 2017 09:05:33 +0000 In-Reply-To: Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: 'Stefano Stabellini' Cc: Anthony Perard , "xen-devel@lists.xenproject.org" , "qemu-devel@nongnu.org" List-Id: xen-devel@lists.xenproject.org PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQo+IEZyb206IFN0ZWZhbm8gU3RhYmVsbGluaSBb bWFpbHRvOnNzdGFiZWxsaW5pQGtlcm5lbC5vcmddCj4gU2VudDogMjQgTWFyY2ggMjAxNyAwMDo1 MQo+IFRvOiBQYXVsIER1cnJhbnQgPFBhdWwuRHVycmFudEBjaXRyaXguY29tPgo+IENjOiBxZW11 LWRldmVsQG5vbmdudS5vcmc7IHhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZzsgU3RlZmFu bwo+IFN0YWJlbGxpbmkgPHNzdGFiZWxsaW5pQGtlcm5lbC5vcmc+OyBBbnRob255IFBlcmFyZAo+ IDxhbnRob255LnBlcmFyZEBjaXRyaXguY29tPgo+IFN1YmplY3Q6IFJlOiBbUEFUQ0ggdjJdIHhl bi1wbGF0Zm9ybTogc2VwYXJhdGUgdW5wbHVnZ2luZyBvZiBOVk1lIGRpc2tzCj4gCj4gT24gVGh1 LCAyMyBNYXIgMjAxNywgUGF1bCBEdXJyYW50IHdyb3RlOgo+ID4gQ29tbWl0IDA5MGZhMWM4ICJh ZGQgc3VwcG9ydCBmb3IgdW5wbHVnZ2luZyBOVk1lIGRpc2tzLi4uIiBleHRlbmRlZCB0aGUKPiA+ IGV4aXN0aW5nIGRpc2sgdW5wbHVnIGZsYWcgdG8gY292ZXIgTlZNZSBkaXNrcyBhcyB3ZWxsIGFz IElERSBhbmQgU0NTSS4KPiA+Cj4gPiBUaGUgcmVjZW50IHRocmVhZCBvbiB0aGUgeGVuLWRldmVs IG1haWxpbmcgbGlzdCBbMV0gaGFzIGhpZ2hsaWdodGVkIHRoYXQKPiA+IHRoaXMgaXMgbm90IGRl c2lyYWJsZSBiZWhhdmlvdXI6IFBWIGZyb250ZW5kcyBzaG91bGQgYmUgYWJsZSB0byBkaXN0aW5n dWlzaAo+ID4gTlZNZSBkaXNrcyBmcm9tIG90aGVyIHR5cGVzIG9mIGRpc2sgYW5kIHNob3VsZCBo YXZlIHNlcGFyYXRlIGNvbnRyb2wKPiBvdmVyCj4gPiB3aGV0aGVyIHRoZXkgYXJlIHVucGx1Z2dl ZC4KPiA+Cj4gPiBUaGlzIHBhdGNoIGRlZmluZXMgYSBuZXcgYml0IGluIHRoZSB1bnBsdWcgbWFz ayBmb3IgdGhpcyBwdXJwb3NlIGFuZCBhbHNvCj4gPiB0aWRpZXMgdXAgdGhlIGRlZmluaXRpb25z IG9mLCBhbmQgaW1wcm92ZXMgdGhlIGNvbW1lbnRzIHJlZ2FyZGluZywgdGhlCj4gPiBwcmV2aW91 c2x5IGV4aXRpbmcgYml0cyBpbiB0aGUgcHJvdG9jb2wuCj4gPgo+ID4gWzFdIGh0dHBzOi8vbGlz dHMueGVuLm9yZy9hcmNoaXZlcy9odG1sL3hlbi1kZXZlbC8yMDE3LTAzL21zZzAyOTI0Lmh0bWwK PiA+Cj4gPiBTaWduZWQtb2ZmLWJ5OiBQYXVsIER1cnJhbnQgPHBhdWwuZHVycmFudEBjaXRyaXgu Y29tPgo+ID4gLS0KPiA+IENjOiBTdGVmYW5vIFN0YWJlbGxpbmkgPHNzdGFiZWxsaW5pQGtlcm5l bC5vcmc+Cj4gPiBDYzogQW50aG9ueSBQZXJhcmQgPGFudGhvbnkucGVyYXJkQGNpdHJpeC5jb20+ Cj4gPgo+ID4gTk9URTogQSBjb21wYW5pb24gcGF0Y2ggd2lsbCBiZSBzdWJtaXR0ZWQgdG8geGVu LWRldmVsIHRvIGFsaWduIHRoZQo+ID4gICAgICAgdW5wbHVnIHByb3RvY29sIGRvY3VtZW50YXRp b24gb25jZSB0aGlzIHBhdGNoIGlzIGFja2VkLgo+IAo+IFRoZSBjb21wYW5pb24gcGF0Y2ggbmVl ZHMgdG8gYmUgYWNrZWQgYmVmb3JlIHRoaXMgcGF0Y2ggZ2V0cyBhcHBsaWVkLiBJbgo+IGZhY3Qs IEkgd291bGQgcHJlZmVyIGlmIHRoZSBjaGFuZ2VzZXQgb2YgdGhlIFhlbiBjb21taXQgd2FzIGFk ZGVkIHRvCj4gdGhpcyBwYXRjaCBkZXNjcmlwdGlvbi4KPiAKPiBJZiB5b3UgYWRkIHRoYXQsIHRo ZW4geW91IGNhbiByZXBvc3QgdGhpcyB3aXRoCj4gCj4gUmV2aWV3ZWQtYnk6IFN0ZWZhbm8gU3Rh YmVsbGluaSA8c3N0YWJlbGxpbmlAa2VybmVsLm9yZz4KPiAKCk9rLiBJJ2xsIGNjIHlvdSBvbiB0 aGUgeGVuIGRvY3MgcGF0Y2ggdG9vLgoKICBQYXVsCgo+IAo+ID4gdjI6Cj4gPiAtIEZpeCB0aGUg Y29tbWl0IGNvbW1lbnQKPiA+IC0tLQo+ID4gIGh3L2kzODYveGVuL3hlbl9wbGF0Zm9ybS5jIHwg NDcKPiArKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrLS0tLS0tLS0tLS0tCj4gPiAg MSBmaWxlIGNoYW5nZWQsIDM1IGluc2VydGlvbnMoKyksIDEyIGRlbGV0aW9ucygtKQo+ID4KPiA+ IGRpZmYgLS1naXQgYS9ody9pMzg2L3hlbi94ZW5fcGxhdGZvcm0uYyBiL2h3L2kzODYveGVuL3hl bl9wbGF0Zm9ybS5jCj4gPiBpbmRleCA2MDEwZjM1Li45ODNkNTMyIDEwMDY0NAo+ID4gLS0tIGEv aHcvaTM4Ni94ZW4veGVuX3BsYXRmb3JtLmMKPiA+ICsrKyBiL2h3L2kzODYveGVuL3hlbl9wbGF0 Zm9ybS5jCj4gPiBAQCAtODcsMTAgKzg3LDMwIEBAIHN0YXRpYyB2b2lkIGxvZ193cml0ZWIoUENJ WGVuUGxhdGZvcm1TdGF0ZSAqcywgY2hhcgo+IHZhbCkKPiA+ICAgICAgfQo+ID4gIH0KPiA+Cj4g PiAtLyogWGVuIFBsYXRmb3JtLCBGaXhlZCBJT1BvcnQgKi8KPiA+IC0jZGVmaW5lIFVOUExVR19B TExfRElTS1MgMQo+ID4gLSNkZWZpbmUgVU5QTFVHX0FMTF9OSUNTIDIKPiA+IC0jZGVmaW5lIFVO UExVR19BVVhfSURFX0RJU0tTIDQKPiA+ICsvKgo+ID4gKyAqIFVucGx1ZyBkZXZpY2UgZmxhZ3Mu Cj4gPiArICoKPiA+ICsgKiBUaGUgbG9naWMgZ290IGEgbGl0dGxlIGNvbmZ1c2VkIGF0IHNvbWUg cG9pbnQgaW4gdGhlIHBhc3QgYnV0IHRoaXMgaXMKPiA+ICsgKiB3aGF0IHRoZXkgZG8gbm93Lgo+ ID4gKyAqCj4gPiArICogYml0IDA6IFVucGx1ZyBhbGwgSURFIGFuZCBTQ1NJIGRpc2tzLgo+ID4g KyAqIGJpdCAxOiBVbnBsdWcgYWxsIE5JQ3MuCj4gPiArICogYml0IDI6IFVucGx1ZyBJREUgZGlz a3MgZXhjZXB0IHByaW1hcnkgbWFzdGVyLiBUaGlzIGlzIG92ZXJyaWRkZW4gaWYKPiA+ICsgKiAg ICAgICAgYml0IDAgaXMgYWxzbyBwcmVzZW50IGluIHRoZSBtYXNrLgo+ID4gKyAqIGJpdCAzOiBV bnBsdWcgYWxsIE5WTWUgZGlza3MuCj4gPiArICoKPiA+ICsgKi8KPiA+ICsjZGVmaW5lIF9VTlBM VUdfSURFX1NDU0lfRElTS1MgMAo+ID4gKyNkZWZpbmUgVU5QTFVHX0lERV9TQ1NJX0RJU0tTICgx dSA8PCBfVU5QTFVHX0lERV9TQ1NJX0RJU0tTKQo+ID4gKwo+ID4gKyNkZWZpbmUgX1VOUExVR19B TExfTklDUyAxCj4gPiArI2RlZmluZSBVTlBMVUdfQUxMX05JQ1MgKDF1IDw8IF9VTlBMVUdfQUxM X05JQ1MpCj4gPiArCj4gPiArI2RlZmluZSBfVU5QTFVHX0FVWF9JREVfRElTS1MgMgo+ID4gKyNk ZWZpbmUgVU5QTFVHX0FVWF9JREVfRElTS1MgKDF1IDw8IF9VTlBMVUdfQVVYX0lERV9ESVNLUykK PiA+ICsKPiA+ICsjZGVmaW5lIF9VTlBMVUdfTlZNRV9ESVNLUyAzCj4gPiArI2RlZmluZSBVTlBM VUdfTlZNRV9ESVNLUyAoMXUgPDwgX1VOUExVR19OVk1FX0RJU0tTKQo+ID4KPiA+ICBzdGF0aWMg dm9pZCB1bnBsdWdfbmljKFBDSUJ1cyAqYiwgUENJRGV2aWNlICpkLCB2b2lkICpvKQo+ID4gIHsK PiA+IEBAIC0xMTEsNyArMTMxLDcgQEAgc3RhdGljIHZvaWQgdW5wbHVnX2Rpc2tzKFBDSUJ1cyAq YiwgUENJRGV2aWNlICpkLAo+IHZvaWQgKm9wYXF1ZSkKPiA+ICB7Cj4gPiAgICAgIHVpbnQzMl90 IGZsYWdzID0gKih1aW50MzJfdCAqKW9wYXF1ZTsKPiA+ICAgICAgYm9vbCBhdXggPSAoZmxhZ3Mg JiBVTlBMVUdfQVVYX0lERV9ESVNLUykgJiYKPiA+IC0gICAgICAgICEoZmxhZ3MgJiBVTlBMVUdf QUxMX0RJU0tTKTsKPiA+ICsgICAgICAgICEoZmxhZ3MgJiBVTlBMVUdfSURFX1NDU0lfRElTS1Mp Owo+ID4KPiA+ICAgICAgLyogV2UgaGF2ZSB0byBpZ25vcmUgcGFzc3Rocm91Z2ggZGV2aWNlcyAq Lwo+ID4gICAgICBpZiAoIXN0cmNtcChkLT5uYW1lLCAieGVuLXBjaS1wYXNzdGhyb3VnaCIpKSB7 Cj4gPiBAQCAtMTI0LDEyICsxNDQsMTYgQEAgc3RhdGljIHZvaWQgdW5wbHVnX2Rpc2tzKFBDSUJ1 cyAqYiwgUENJRGV2aWNlICpkLAo+IHZvaWQgKm9wYXF1ZSkKPiA+ICAgICAgICAgIGJyZWFrOwo+ ID4KPiA+ICAgICAgY2FzZSBQQ0lfQ0xBU1NfU1RPUkFHRV9TQ1NJOgo+ID4gLSAgICBjYXNlIFBD SV9DTEFTU19TVE9SQUdFX0VYUFJFU1M6Cj4gPiAgICAgICAgICBpZiAoIWF1eCkgewo+ID4gICAg ICAgICAgICAgIG9iamVjdF91bnBhcmVudChPQkpFQ1QoZCkpOwo+ID4gICAgICAgICAgfQo+ID4g ICAgICAgICAgYnJlYWs7Cj4gPgo+ID4gKyAgICBjYXNlIFBDSV9DTEFTU19TVE9SQUdFX0VYUFJF U1M6Cj4gPiArICAgICAgICBpZiAoZmxhZ3MgJiBVTlBMVUdfTlZNRV9ESVNLUykgewo+ID4gKyAg ICAgICAgICAgIG9iamVjdF91bnBhcmVudChPQkpFQ1QoZCkpOwo+ID4gKyAgICAgICAgfQo+ID4g Kwo+ID4gICAgICBkZWZhdWx0Ogo+ID4gICAgICAgICAgYnJlYWs7Cj4gPiAgICAgIH0KPiA+IEBA IC0xNDcsMTAgKzE3MSw5IEBAIHN0YXRpYyB2b2lkIHBsYXRmb3JtX2ZpeGVkX2lvcG9ydF93cml0 ZXcodm9pZAo+ICpvcGFxdWUsIHVpbnQzMl90IGFkZHIsIHVpbnQzMl90IHYKPiA+ICAgICAgc3dp dGNoIChhZGRyKSB7Cj4gPiAgICAgIGNhc2UgMDogewo+ID4gICAgICAgICAgUENJRGV2aWNlICpw Y2lfZGV2ID0gUENJX0RFVklDRShzKTsKPiA+IC0gICAgICAgIC8qIFVucGx1ZyBkZXZpY2VzLiAg VmFsdWUgaXMgYSBiaXRtYXNrIG9mIHdoaWNoIGRldmljZXMgdG8KPiA+IC0gICAgICAgICAgIHVu cGx1Zywgd2l0aCBiaXQgMCB0aGUgZGlzayBkZXZpY2VzLCBiaXQgMSB0aGUgbmV0d29yawo+ID4g LSAgICAgICAgICAgZGV2aWNlcywgYW5kIGJpdCAyIHRoZSBub24tcHJpbWFyeS1tYXN0ZXIgSURF IGRldmljZXMuICovCj4gPiAtICAgICAgICBpZiAodmFsICYgKFVOUExVR19BTExfRElTS1MgfCBV TlBMVUdfQVVYX0lERV9ESVNLUykpIHsKPiA+ICsgICAgICAgIC8qIFVucGx1ZyBkZXZpY2VzLiBT ZWUgY29tbWVudCBhYm92ZSBmbGFnIGRlZmluaXRpb25zICovCj4gPiArICAgICAgICBpZiAodmFs ICYgKFVOUExVR19JREVfU0NTSV9ESVNLUyB8IFVOUExVR19BVVhfSURFX0RJU0tTIHwKPiA+ICsg ICAgICAgICAgICAgICAgICAgVU5QTFVHX05WTUVfRElTS1MpKSB7Cj4gPiAgICAgICAgICAgICAg RFBSSU5URigidW5wbHVnIGRpc2tzXG4iKTsKPiA+ICAgICAgICAgICAgICBwY2lfdW5wbHVnX2Rp c2tzKHBjaV9kZXYtPmJ1cywgdmFsKTsKPiA+ICAgICAgICAgIH0KPiA+IEBAIC0zMzgsMTQgKzM2 MSwxNCBAQCBzdGF0aWMgdm9pZCB4ZW5fcGxhdGZvcm1faW9wb3J0X3dyaXRlYih2b2lkCj4gKm9w YXF1ZSwgaHdhZGRyIGFkZHIsCj4gPiAgICAgICAgICAgICAgICogSWYgVk1EUCB3YXMgdG8gY29u dHJvbCBib3RoIGRpc2sgYW5kIExBTiBpdCB3b3VsZCB1c2UgNC4KPiA+ICAgICAgICAgICAgICAg KiBJZiBpdCBjb250cm9sbGVkIGp1c3QgZGlzayBvciBqdXN0IExBTiwgaXQgd291bGQgdXNlIDgg YmVsb3cuCj4gPiAgICAgICAgICAgICAgICovCj4gPiAtICAgICAgICAgICAgcGNpX3VucGx1Z19k aXNrcyhwY2lfZGV2LT5idXMsIFVOUExVR19BTExfRElTS1MpOwo+ID4gKyAgICAgICAgICAgIHBj aV91bnBsdWdfZGlza3MocGNpX2Rldi0+YnVzLCBVTlBMVUdfSURFX1NDU0lfRElTS1MpOwo+ID4g ICAgICAgICAgICAgIHBjaV91bnBsdWdfbmljcyhwY2lfZGV2LT5idXMpOwo+ID4gICAgICAgICAg fQo+ID4gICAgICAgICAgYnJlYWs7Cj4gPiAgICAgIGNhc2UgODoKPiA+ICAgICAgICAgIHN3aXRj aCAodmFsKSB7Cj4gPiAgICAgICAgICBjYXNlIDE6Cj4gPiAtICAgICAgICAgICAgcGNpX3VucGx1 Z19kaXNrcyhwY2lfZGV2LT5idXMsIFVOUExVR19BTExfRElTS1MpOwo+ID4gKyAgICAgICAgICAg IHBjaV91bnBsdWdfZGlza3MocGNpX2Rldi0+YnVzLCBVTlBMVUdfSURFX1NDU0lfRElTS1MpOwo+ ID4gICAgICAgICAgICAgIGJyZWFrOwo+ID4gICAgICAgICAgY2FzZSAyOgo+ID4gICAgICAgICAg ICAgIHBjaV91bnBsdWdfbmljcyhwY2lfZGV2LT5idXMpOwo+ID4gLS0KPiA+IDIuMS40Cj4gPgoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5v cmcveGVuLWRldmVsCg==