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Mon, 15 Jun 2026 16:51:50 +0800 (CST) Received: from [10.67.109.254] (10.67.109.254) by dggpemf500011.china.huawei.com (7.185.36.131) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 15 Jun 2026 16:51:48 +0800 Message-ID: Date: Mon, 15 Jun 2026 16:51:48 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 3/3] arm64: Add HOTPLUG_PARALLEL support for secondary CPUs To: Michael Kelley , "catalin.marinas@arm.com" , "will@kernel.org" , "tsbogend@alpha.franken.de" , "pjw@kernel.org" , "palmer@dabbelt.com" , "aou@eecs.berkeley.edu" , "alex@ghiti.fr" , "tglx@kernel.org" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "hpa@zytor.com" , "peterz@infradead.org" , "kees@kernel.org" , "nathan@kernel.org" , "linusw@kernel.org" , "ojeda@kernel.org" , "david.kaplan@amd.com" , "lukas.bulwahn@redhat.com" , "ryan.roberts@arm.com" , "maz@kernel.org" , "timothy.hayes@arm.com" , "lpieralisi@kernel.org" , "thuth@redhat.com" , "oupton@kernel.org" , "yeoreum.yun@arm.com" , "miko.lenczewski@arm.com" , "broonie@kernel.org" , "kevin.brodsky@arm.com" , "james.clark@linaro.org" , "tabba@google.com" , "mrigendra.chaubey@gmail.com" , "arnd@arndb.de" , "anshuman.khandual@arm.com" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-mips@vger.kernel.org" , "linux-riscv@lists.infradead.org" References: <20260611133809.3854977-1-ruanjinjie@huawei.com> <20260611133809.3854977-4-ruanjinjie@huawei.com> From: Jinjie Ruan In-Reply-To: X-Originating-IP: [10.67.109.254] X-ClientProxiedBy: kwepems500002.china.huawei.com (7.221.188.17) To dggpemf500011.china.huawei.com (7.185.36.131) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260615_015201_071288_1469ECA4 X-CRM114-Status: GOOD ( 15.92 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org CgpPbiA2LzEyLzIwMjYgMTE6NDUgUE0sIE1pY2hhZWwgS2VsbGV5IHdyb3RlOgo+IEZyb206IEpp bmppZSBSdWFuIDxydWFuamluamllQGh1YXdlaS5jb20+IFNlbnQ6IFRodXJzZGF5LCBKdW5lIDEx LCAyMDI2IDY6MzggQU0KPj4KPj4gU3VwcG9ydCBmb3IgcGFyYWxsZWwgc2Vjb25kYXJ5IENQVSBi cmluZ3VwIGlzIGFscmVhZHkgdXRpbGl6ZWQgYnkgeDg2LAo+PiBNSVBTLCBhbmQgUklTQy1WLiBU aGlzIHBhdGNoIGJyaW5ncyB0aGlzIGNhcGFiaWxpdHkgdG8gdGhlIGFybTY0Cj4+IGFyY2hpdGVj dHVyZS4KPj4KPj4gUmV3b3JrIHRoZSBnbG9iYWwgYHNlY29uZGFyeV9kYXRhYCBhY2Nlc3NlZCBk dXJpbmcgZWFybHkgYm9vdCBpbnRvCj4+IGEgcGVyLUNQVSBhcnJheS4gVGhpcyBhcnJheSBtYXBz IGxvZ2ljYWwgQ1BVIElEcyB0byBNUElEUl9FTDEgdmFsdWVzLAo+PiBlbmFibGluZyB0aGUgZWFy bHkgYm9vdCBjb2RlIGluIGhlYWQuUyB0byByZXNvbHZlIGVhY2ggc2Vjb25kYXJ5IENQVSdzCj4+ IGxvZ2ljYWwgSUQgY29uY3VycmVudGx5Lgo+Pgo+PiBUbyBmdWxseSBlbmFibGUgSE9UUExVR19Q QVJBTExFTCwgdGhpcyBwYXRjaCBpbXBsZW1lbnRzOgo+PiAxKSBBbiBhcm02NC1zcGVjaWZpYyBh cmNoX2NwdWhwX2tpY2tfYXBfYWxpdmUoKSBoYW5kbGVyLgo+PiAyKSBDYWxsYmFja3MgdG8gY3B1 aHBfYXBfc3luY19hbGl2ZSgpIGluc2lkZSBzZWNvbmRhcnlfc3RhcnRfa2VybmVsKCkuCj4+Cj4+ IFN1Y2Nlc3NmdWxseSB0ZXN0ZWQgb24gUUVNVSBBUk02NCB2aXJ0IG1hY2hpbmUgKEtWTSBvbiwg MTI4IHZDUFVzKS4KPj4KPj4gfCAgICAgdGVzdCBrZXJuZWwJICAgfCBzZWNvbmRhcnkgQ1BVcyBi b290IHRpbWUgfAo+PiB8ICAtLS0tLS0tLS0tLS0tLS0tLS0tLS0gICB8CS0tLS0tLS0tLS0tLS0t LS0tLS0tICB8Cj4+IHwgICBXaXRob3V0IHRoaXMgcGF0Y2ggICAgIHwJCTE1NS42NzIJICAgICAg fAo+PiB8ICAgY3B1aHAucGFyYWxsZWw9MAkgICB8CQk2Mi44OTcJICAgICAgfAo+PiB8ICAgY3B1 aHAucGFyYWxsZWw9MQkgICB8CQkxNjYuNzAzCSAgICAgIHwKPiAKPiBUaGUgbGFzdCB0d28gcm93 cyBzZWVtIG1peGVkIHVwLiBJIHdvdWxkIGV4cGVjdCBwYXJhbGxlbD0wIHRvCj4gcmVzdWx0IGlu IGEgbG9uZ2VyIGJvb3QgdGltZS4KCkhpLCBNaWNoYWVsLAoKVGhlIHJlc3VsdHMgYXJlIGNvcnJl Y3QgYW5kIG5vdCBtaXhlZCB1cC4KCkNvbXBhcmVkIHRvIHRoZSBvcmlnaW5hbCBub27igJFIT1RQ TFVHX1BBUkFMTEVMIGFwcHJvYWNoLCB0aGUgYWR2YW50YWdlIG9mCmNwdWhwLnBhcmFsbGVsPTAg bGllcyBpbiBpdHMgdXNlIG9mIGNwdV9yZWxheChgeWllbGRgIG9uIGFybTY0KSBpbnN0ZWFkCm9m IHRoZSB3YWl0X2Zvcl9jb21wbGV0aW9uX3RpbWVvdXQoKSBtZWNoYW5pc20gKHdoaWNoIG1heSBj YXVzZSBzbGVlcAphbmQgY29udGV4dCBzd2l0Y2hpbmcpLiBUaGlzIHNpZ25pZmljYW50bHkgcmVk dWNlcyB0aGUgb3ZlcmhlYWQgb2YgVk0KZXhpdHMgYW5kIGNvbnRleHQgc3dpdGNoZXMgaW4gYSBL Vk0gZ3Vlc3QsIHRoZXJlYnkgY3V0dGluZyB0aGUgc2Vjb25kYXJ5CkNQVSBib290IHRpbWUgYnkg bW9yZSB0aGFuIGhhbGYuCgpSZWdhcmRpbmcgY3B1aHAucGFyYWxsZWw9MSwgSSBiZWxpZXZlIHRo ZSByZWFzb24gaXQgZmFpbHMgdG8gb3B0aW1pemUKYm9vdCB0aW1lIGlzIHRoYXQgd2hlbiBhIGxh cmdlIG51bWJlciBvZiBDUFVzIGlzc3VlIHRoZSBLSUNLX0FQIGNhbGwKc2ltdWx0YW5lb3VzbHks IGl0IHJlc3VsdHMgaW4gc2V2ZXJlIGxvY2sgY29udGVudGlvbiB3aXRoaW4gS1ZNLCB3aGljaApw YXJhZG94aWNhbGx5IHNsb3dzIGRvd24gc2Vjb25kYXJ5IENQVSBicmluZ3VwLiBIb3dldmVyLCB0 aGlzIG5lZWRzCmZ1cnRoZXIgaW52ZXN0aWdhdGlvbiBpbnRvIHRoZSBQU0NJX0NQVV9PTiBjb2Rl IGluIEtWTS4KCkknbSB0ZXN0aW5nIHRoZXNlIHBlcmZvcm1hbmNlIGFzcGVjdHMgb24gcGh5c2lj YWwgaGFyZHdhcmUsIHNvIHRoZQpyZXN1bHRzIG1pZ2h0IGJlIHNvbWV3aGF0IGRpZmZlcmVudCBi ZWNhdXNlIHNlY29uZGFyeSBDUFUgYnJpbmd1cApyZXF1aXJlcyB0cmFwcGluZyBpbnRvIHRoZSBB VEYgZmlybXdhcmUuCgpCZXN0IHJlZ2FyZHMsCkppbmppZQoKPiAKPiBNaWNoYWVsCj4gCj4+Cj4+ IFNpZ25lZC1vZmYtYnk6IEppbmppZSBSdWFuIDxydWFuamluamllQGh1YXdlaS5jb20+Cj4+IC0t LQo+PiAgYXJjaC9hcm02NC9LY29uZmlnICAgICAgICAgICB8ICAxICsKPj4gIGFyY2gvYXJtNjQv aW5jbHVkZS9hc20vc21wLmggfCAgOCArKysrKysrKwo+PiAgYXJjaC9hcm02NC9rZXJuZWwvaGVh ZC5TICAgICB8IDIzICsrKysrKysrKysrKysrKysrKysrKysrCj4+ICBhcmNoL2FybTY0L2tlcm5l bC9zbXAuYyAgICAgIHwgMjcgKysrKysrKysrKysrKysrKysrKysrKysrKysrCj4+ICA0IGZpbGVz IGNoYW5nZWQsIDU5IGluc2VydGlvbnMoKykKPj4KPiAKPiAKCgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1yaXNjdiBtYWlsaW5nIGxpc3QKbGlu dXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9t YWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==