From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ECF2FECAAD8 for ; Fri, 23 Sep 2022 01:35:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:CC:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=xroqOExQMGWmwkj/TK5cplX8lEamkQmweYKOdoKsHfQ=; b=SbF/fJBCmK3fDl Y5j001crZvb7L0Nk4GphCMFLv+/neq2Js0eO3Q6TuRH2fIekQSLdcuoEVlZ/P0vnbRFluVCYAY0TI 2X7VrGr28hzx5cpdSAQ7P5IEzQcOaWC3Bjiie89hrQB9Xbl4P5lNj/WFwfDa6eFJLSxoCyrpmkaVl 2C9dsgqjnguW8onrWxJ0qFU29a5KZqho1Ijpg+CZVD3Sho6sz68ccVEXK6cvR3nyxBlwXf05h1Xw3 pTByVn3AK+r0lNnd9v3GEP+E6B/3vF8gJtlWc3TKZRdAgehC01yLjnCSwTzRcxCF4DpdEF3s/o5GM +9P4NGvDXAoBbd01rqrg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1obXa4-0011cF-Fg; Fri, 23 Sep 2022 01:34:17 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1obXRD-000z5S-0o; Fri, 23 Sep 2022 01:25:11 +0000 Received: from kwepemi500012.china.huawei.com (unknown [172.30.72.54]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4MYZ971SjTzWh5r; Fri, 23 Sep 2022 09:20:59 +0800 (CST) Received: from [10.67.110.108] (10.67.110.108) by kwepemi500012.china.huawei.com (7.221.188.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Fri, 23 Sep 2022 09:24:56 +0800 Message-ID: <55c32279-1a96-0a31-ca2b-ae4e34365625@huawei.com> Date: Fri, 23 Sep 2022 09:24:55 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0 Subject: Re: [PATCH V2 3/3] arm64/kprobe: Optimize the performance of patching single-step slot To: Will Deacon CC: , , , , , , , , , , , , References: <20220913033454.104519-1-liaochang1@huawei.com> <20220913033454.104519-4-liaochang1@huawei.com> <20220922133850.GC12095@willie-the-truck> From: "liaochang (A)" In-Reply-To: <20220922133850.GC12095@willie-the-truck> X-Originating-IP: [10.67.110.108] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemi500012.china.huawei.com (7.221.188.12) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220922_182507_307966_1025D42C X-CRM114-Status: GOOD ( 12.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org CgrlnKggMjAyMi85LzIyIDIxOjM4LCBXaWxsIERlYWNvbiDlhpnpgZM6Cj4gT24gVHVlLCBTZXAg MTMsIDIwMjIgYXQgMTE6MzQ6NTRBTSArMDgwMCwgTGlhbyBDaGFuZyB3cm90ZToKPj4gU2luZ2xl LXN0ZXAgc2xvdCB3b3VsZCBub3QgYmUgdXNlZCB1bnRpbCBrcHJvYmUgaXMgZW5hYmxlZCwgdGhh dCBtZWFucwo+PiBubyByYWNlIGNvbmRpdGlvbiBvY2N1cnMgb24gaXQgdW5kZXIgU01QLCBoZW5j ZSBpdCBpcyBzYWZlIHRvIHBhY3RoIHNzCj4+IHNsb3Qgd2l0aG91dCBzdG9wcGluZyBtYWNoaW5l Lgo+Pgo+PiBTaWduZWQtb2ZmLWJ5OiBMaWFvIENoYW5nIDxsaWFvY2hhbmcxQGh1YXdlaS5jb20+ Cj4+IC0tLQo+PiAgYXJjaC9hcm02NC9rZXJuZWwvcHJvYmVzL2twcm9iZXMuYyB8IDUgKystLS0K Pj4gIDEgZmlsZSBjaGFuZ2VkLCAyIGluc2VydGlvbnMoKyksIDMgZGVsZXRpb25zKC0pCj4+Cj4+ IGRpZmYgLS1naXQgYS9hcmNoL2FybTY0L2tlcm5lbC9wcm9iZXMva3Byb2Jlcy5jIGIvYXJjaC9h cm02NC9rZXJuZWwvcHJvYmVzL2twcm9iZXMuYwo+PiBpbmRleCBkMWQxODIzMjAyNDUuLjU5MDJl MzNmZDNiNiAxMDA2NDQKPj4gLS0tIGEvYXJjaC9hcm02NC9rZXJuZWwvcHJvYmVzL2twcm9iZXMu Ywo+PiArKysgYi9hcmNoL2FybTY0L2tlcm5lbC9wcm9iZXMva3Byb2Jlcy5jCj4+IEBAIC00NCwx MSArNDQsMTAgQEAgcG9zdF9rcHJvYmVfaGFuZGxlcihzdHJ1Y3Qga3Byb2JlICosIHN0cnVjdCBr cHJvYmVfY3RsYmxrICosIHN0cnVjdCBwdF9yZWdzICopOwo+PiAgc3RhdGljIHZvaWQgX19rcHJv YmVzIGFyY2hfcHJlcGFyZV9zc19zbG90KHN0cnVjdCBrcHJvYmUgKnApCj4+ICB7Cj4+ICAJa3By b2JlX29wY29kZV90ICphZGRyID0gcC0+YWluc24uYXBpLmluc247Cj4+IC0Jdm9pZCAqYWRkcnNb XSA9IHthZGRyLCBhZGRyICsgMX07Cj4+IC0JdTMyIGluc25zW10gPSB7cC0+b3Bjb2RlLCBCUks2 NF9PUENPREVfS1BST0JFU19TU307Cj4+ICAKPj4gIAkvKiBwcmVwYXJlIGluc24gc2xvdCAqLwo+ PiAtCWFhcmNoNjRfaW5zbl9wYXRjaF90ZXh0KGFkZHJzLCBpbnNucywgMik7Cj4+ICsJYWFyY2g2 NF9pbnNuX3dyaXRlKGFkZHIsIHAtPm9wY29kZSk7Cj4+ICsJYWFyY2g2NF9pbnNuX3dyaXRlKGFk ZHIgKyAxLCBCUks2NF9PUENPREVfS1BST0JFU19TUyk7Cj4+ICAKPj4gIAlmbHVzaF9pY2FjaGVf cmFuZ2UoKHVpbnRwdHJfdClhZGRyLCAodWludHB0cl90KShhZGRyICsgTUFYX0lOU05fU0laRSkp Owo+IAo+IEhtbSwgc28gaXQgbG9va3MgbGlrZSBwcmlvciB0byB5b3VyIGNoYW5nZSB3ZSB3ZXJl IGRvaW5nIHRoZSBjYWNoZQo+IG1haW50ZWJuYW5jZSB0d2ljZTogb25jZSBpbiBhYXJjaDY0X2lu c25fcGF0Y2hfdGV4dCgpIGZyb20gc3RvcCBtYWNoaW5lCj4gY29udGV4dCBhbmQgdGhlbiBhZ2Fp biBpbiB0aGUgZmx1c2hfaWNhY2hlX3JhbmdlKCkgY2FsbCBhYm92ZS4KPiAKPiBJIHN1cHBvc2Ug dGhlIGNsZWFuZXN0IHRoaW5nIHdvdWxkIGJlIHRvIGRyb3AgdGhlIGZsdXNoX2ljYWNoZV9yYW5n ZSgpCj4gY2FsbCBhbmQgdGhlbiB1c2UgYWFyY2g2NF9pbnNuX3BhdGNoX3RleHRfbm9zeW5jKCkg aW5zdGVhZCBvZgo+IGFhcmNoNjRfaW5zbl93cml0ZSgpIGluIHlvdXIgY2hhbmdlLgoKT0vvvIxJ IHdpbGwgaW1wcm92ZSBpdCBpbiBuZXh0IHZlcnNpb24sIHRoYW5rcy4KCj4gCj4gV2lsbAo+IC4K Ci0tIApCUiwKTGlhbywgQ2hhbmcKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJu ZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK