From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from [222.73.24.84] (helo=song.cn.fujitsu.com) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TdA4f-0003a4-1o for kexec@lists.infradead.org; Tue, 27 Nov 2012 01:34:58 +0000 Message-ID: <50B41849.9040103@cn.fujitsu.com> Date: Tue, 27 Nov 2012 09:32:57 +0800 From: Zhang Yanfei MIME-Version: 1.0 Subject: Re: [PATCH v8 1/2] x86/kexec: add a new atomic notifier list for kdump References: <50ADE0C2.1000106@cn.fujitsu.com> <50ADE11A.401@cn.fujitsu.com> <87ip8sxuyh.fsf@xmission.com> <20121126172054.GF12969@redhat.com> <87fw3wuuoh.fsf@xmission.com> <20121126175327.GG12969@redhat.com> <87mwy4teh8.fsf@xmission.com> In-Reply-To: <87mwy4teh8.fsf@xmission.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: "Eric W. Biederman" Cc: Marcelo Tosatti , Gleb Natapov , "kvm@vger.kernel.org" , "x86@kernel.org" , "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" 09ogMjAxMsTqMTHUwjI3yNUgMDI6MTgsIEVyaWMgVy4gQmllZGVybWFuINC0tcA6Cj4gR2xlYiBO YXRhcG92IDxnbGViQHJlZGhhdC5jb20+IHdyaXRlczoKPiAKPj4gT24gTW9uLCBOb3YgMjYsIDIw MTIgYXQgMTE6NDM6MTBBTSAtMDYwMCwgRXJpYyBXLiBCaWVkZXJtYW4gd3JvdGU6Cj4+PiBHbGVi IE5hdGFwb3YgPGdsZWJAcmVkaGF0LmNvbT4gd3JpdGVzOgo+Pj4KPj4+PiBPbiBNb24sIE5vdiAy NiwgMjAxMiBhdCAwOTowODo1NEFNIC0wNjAwLCBFcmljIFcuIEJpZWRlcm1hbiB3cm90ZToKPj4+ Pj4gWmhhbmcgWWFuZmVpIDx6aGFuZ3lhbmZlaUBjbi5mdWppdHN1LmNvbT4gd3JpdGVzOgo+Pj4+ Pgo+Pj4+Pj4gVGhpcyBwYXRjaCBhZGRzIGFuIGF0b21pYyBub3RpZmllciBsaXN0IG5hbWVkIGNy YXNoX25vdGlmaWVyX2xpc3QuCj4+Pj4+PiBDdXJyZW50bHksIHdoZW4gbG9hZGluZyBrdm0taW50 ZWwgbW9kdWxlLCBhIG5vdGlmaWVyIHdpbGwgYmUgcmVnaXN0ZXJlZAo+Pj4+Pj4gaW4gdGhlIGxp c3QgdG8gZW5hYmxlIHZtY3NzIGxvYWRlZCBvbiBhbGwgY3B1cyB0byBiZSBWTUNMRUFSJ2QgaWYK Pj4+Pj4+IG5lZWRlZC4KPj4+Pj4KPj4+Pj4gY3Jhc2hfbm90aWZpZXJfbGlzdCBpY2sgZ2FnIHBs ZWFzZSBuby4gIEVmZmVjdGl2ZWx5IHRoaXMgbWFrZXMgdGhlIGtleGVjCj4+Pj4+IG9uIHBhbmlj IGNvZGUgcGF0aCB1bmRlYnVnZ2FibGUuCj4+Pj4+Cj4+Pj4+IEluc3RlYWQgd2UgbmVlZCB0byB1 c2UgZGlyZWN0IGZ1bmN0aW9uIGNhbGxzIHRvIHdoYXRldmVyIHlvdSBhcmUgZG9pbmcuCj4+Pj4+ Cj4+Pj4gVGhlIGNvZGUgd2Fsa3MgbGlua2VkIGxpc3QgaW4ga3ZtLWludGVsIG1vZHVsZSBhbmQg Y2FsbHMgdm1jbGVhciBvbgo+Pj4+IHdoYXRldmVyIGl0IGZpbmRzIHRoZXJlLiBTaW5jZSB0aGUg ZnVuY3Rpb24gaGF2ZSB0byByZXNpZGVzIGluIGt2bS1pbnRlbAo+Pj4+IG1vZHVsZSBpdCBjYW5u b3QgYmUgY2FsbGVkIGRpcmVjdGx5LiBJcyBjYWxsYmFjayBwb2ludGVyIHRoYXQgaXMgc2V0Cj4+ Pj4gYnkga3ZtLWludGVsIG1vcmUgYWNjZXB0YWJsZT8KPj4+Cj4+PiBZZXMgYSBzcGVjaWZpYyBj YWxsYmFjayBmdW5jdGlvbiBpcyBtb3JlIGFjY2VwdGFibGUuICBMb29raW5nIGEgbGl0dGxlCj4+ PiBkZWVwZXIgdm1jbGVhcl9sb2NhbF9sb2FkZWRfdm1jc3MgaXMgbm90IHBhcnRpY3VsYXJseSBh Y2NlcHRhYmxlLiBJdCBpcwo+Pj4gZG9pbmcgYSBsb3Qgb2Ygd29yayB0aGF0IGlzIHVubmVjZXNz YXJ5IHRvIHNhdmUgdGhlIHZpcnR1YWwgcmVnaXN0ZXJzCj4+PiBvbiB0aGUga2V4ZWMgb24gcGFu aWMgcGF0aC4KPj4+Cj4+IFdoYXQgd29yayBhcmUgeW91IHJlZmVycmluZyB0byBpbiBwYXJ0aWN1 bGFyIHRoYXQgbWF5IG5vdCBiZQo+PiBhY2NlcHRhYmxlPwo+IAo+IFRoZSB1bm5lY2Vzc2FyeSB3 b3JrIHRoYXQgSSB3YXMgc2VlIGlzIGFsbCBvZiB0aGUgc29mdHdhcmUgc3RhdGUKPiBjaGFuZ2lu Zy4gIFVubGlua2luZyB0aGluZ3MgZnJvbSBsaW5rZWQgbGlzdHMgZmxpcHBpbmcgdmFyaWFibGVz Lgo+IE5vbmUgb2YgdGhhdCBhcHBlYXJzIHJlbGF0ZWQgdG8gdGhlIGZ1bmRhbWVudGFsIGlzc3Vl IHNhdmluZyBjcHUKPiBzdGF0ZS4KPiAKPiBTaW1wbHkgcmV1c2luZyBhIGZ1bmN0aW9uIHRoYXQg ZG9lcyBtb3JlIHRoYW4gd2hhdCBpcyBzdHJpY3RseSByZXF1aXJlZAo+IG1ha2VzIG1lIG5lcnZv dXMuICBXaGF0IGlzIHRoZSBjaGFuY2UgdGhhdCB0aGUgZnVuY3Rpb24gd2lsbCBncm93Cj4gd2l0 aCBtYWludGVuYW5jZSBhbmQgYWRkIGNvbnN0cnVjdHMgdGhhdCBhcmUgbm90IHNhZmUgaW4gYSBr ZXhlYyBvbgo+IHBhbmljIHNpdHV0YXRpb24uCgpTbyBpbiBzdW1tYXJ5LAoKMS4gYSBzcGVjaWZp YyBjYWxsYmFjayBmdW5jdGlvbiBpbnN0ZWFkIG9mIGEgbm90aWZpZXI/CgoyLiBJbnN0ZWFkIG9m IGNhbGxpbmcgdm1jbGVhcl9sb2NhbF9sb2FkZWRfdm1jc3MsIHRoZSB2bWNsZWFyIG9wZXJhdGlv bgogICB3aWxsIGp1c3QgY2FsbCB0aGUgdm1jbGVhciBvbiBldmVyeSB2bWNzcyBsb2FkZWQgb24g dGhlIGNwdT8KCiAgIGxpa2UgYmVsb3c6CgogICBzdGF0aWMgdm9pZCBjcmFzaF92bWNsZWFyX2xv Y2FsX2xvYWRlZF92bWNzcyh2b2lkKQogICB7CiAgICAgICAgaW50IGNwdSA9IHJhd19zbXBfcHJv Y2Vzc29yX2lkKCk7CiAgICAgICAgc3RydWN0IGxvYWRlZF92bWNzICp2LCAqbjsKCiAgICAgICAg aWYgKCFjcmFzaF9sb2NhbF92bWNsZWFyX2VuYWJsZWQoY3B1KSkKICAgICAgICAgICAgICAgIHJl dHVybjsKCiAgICAgICAgbGlzdF9mb3JfZWFjaF9lbnRyeV9zYWZlKHYsIG4sICZwZXJfY3B1KGxv YWRlZF92bWNzc19vbl9jcHUsIGNwdSksCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg IGxvYWRlZF92bWNzc19vbl9jcHVfbGluaykKICAgICAgICAgICAgICAgIHZtY3NfY2xlYXIodi0+ dm1jcyk7CiAgIH0KCiAgIHJpZ2h0PwoKVGhhbmtzClpoYW5nCgo+IAo+Pj4gSW4gZmFjdCBJIHdv bmRlciBpZiBpdCBtaWdodCBub3QganVzdCBiZSBlYXNpZXIgdG8gY2FsbCB2bWNzX2NsZWFyIHRv IGEKPj4+IGZpeGVkIHBlciBjcHUgYnVmZmVyLgo+Pj4KPj4gVGhlcmUgbWF5IGJlIG1vcmUgdGhh biBvbmUgdm1jcyBsb2FkZWQgb24gYSBjcHUsIGhlbmNlIHRoZSBsaXN0Lgo+Pgo+Pj4gUGVyZm9y bWluZyBsaXN0IHdhbGtpbmcgaW4gaW50ZXJydXB0IGNvbnRleHQgd2l0aG91dCBsb2NraW5nIGlu Cj4+PiB2bWNsZWFyX2xvY2FsX2xvYWRlZCB2bWNzcyBsb29rcyBhIGJpdCBzY2FyeS4gIE5vdCB0 aGF0IGxvY2tpbmcgd291bGQKPj4+IG1ha2UgaXQgYW55IGJldHRlciwgYXMgbG9ja2luZyB3b3Vs ZCBzaW1wbHkgYWRkIG9uZSBtb3JlIHdheSB0byBkZWFkbG9jawo+Pj4gdGhlIHN5c3RlbS4gIE9u bHkgYW4gcmN1IGxpc3Qgd2FsayBpcyBhdCBhbGwgc2FmZS4gIEEgbGlzdCB3YWxrIHRoYXQKPj4+ IG1vZGlmaWVzIHRoZSBsaXN0IGFzIHZtY2xlYXJfbG9jYWxfbG9hZGVkX3ZtY3NzIGRvZXMgaXMg ZGVmaW5pdGVseSBub3Qgc2FmZS4KPj4+Cj4+IFRoZSBsaXN0IHZtY2xlYXJfbG9jYWxfbG9hZGVk IHdhbGtzIGlzIHBlciBjcHUuIFpoYW5nJ3Mga3ZtIHBhdGNoCj4+IGRpc2FibGVzIGtleGVjIGNh bGxiYWNrIHdoaWxlIGxpc3QgaXMgbW9kaWZpZWQuCj4gCj4gSWYgdGhlIGxpc3QgaXMgb25seSBt b2RpZmllZCBvbiBpdCdzIGNwdSBhbmQgd2UgYXJlIHJ1bm5pbmcgb24gdGhhdCBjcHUKPiB0aGF0 IGRvZXMgbG9vayBsaWtlIGl0IHdpbGwgZ2l2ZSB0aGUgbmVjZXNzYXJ5IHByb3RlY3Rpb25zLiAg SXQgaXNuJ3QKPiBwYXJ0aWN1bGFybHkgY2xlYXIgYXQgZmlyc3QgZ2xhbmNlIHRoYXQgaXMgdGhl IGNhc2UgdW5mb3J0dW5hdGVseS4KPiAKPiBFcmljCj4gCgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18Ka2V4ZWMgbWFpbGluZyBsaXN0CmtleGVjQGxpc3Rz LmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5m by9rZXhlYwo=