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Wed, 21 May 2025 21:23:45 +0800 (CST) Date: Wed, 21 May 2025 21:23:45 +0800 (CST) From: "David Wang" <00107082@163.com> To: "Mathias Nyman" Cc: gregkh@linuxfoundation.org, oneukum@suse.com, stern@rowland.harvard.edu, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 1/2] USB: core: add a memory pool to urb caching host-controller private data X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT5.0.14 build 20240801(9da12a7b) Copyright (c) 2002-2025 www.mailtech.cn 163com In-Reply-To: References: <20250517083819.6127-1-00107082@163.com> X-NTES-SC: AL_Qu2fBfSYvEAp4yiYYukZnEYQheY4XMKyuPkg1YJXOp80hiXs5y0de1tdNELQyv2tARCglDysXjJszPZVeZNJZIzyTXUGfkExsDiBt9Uqo4Jx Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=GBK Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <49228bf7.a1d1.196f303aa15.Coremail.00107082@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:hygvCgD3fxLi0y1oGPsJAA--.25514W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/1tbiqBBUqmgtygNpkAAFs2 X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== CkF0IDIwMjUtMDUtMjEgMjA6Mjg6MTcsICJNYXRoaWFzIE55bWFuIiA8bWF0aGlhcy5ueW1hbkBp bnRlbC5jb20+IHdyb3RlOgo+T24gMTcuNS4yMDI1IDExLjM4LCBEYXZpZCBXYW5nIHdyb3RlOgo+ PiAtLS0KPj4gQ2hhbmdlcyBzaW5jZSB2MjoKPj4gMS4gYWN0aXZhdCB0aGUgcG9vbCBvbmx5IHdo ZW4gdGhlIHVyYiBvYmplY3QgaXMgY3JlYXRlZCB2aWEKPj4gdXNiX2FsbG9jX3VyYigpCj4+IFRo YW5rcyB0byBPbGl2ZXIgTmV1a3VtIDxvbmV1a3VtQHN1c2UuY29tPidzIHJldmlldy4KPj4gLS0t Cj4+IFVSQiBvYmplY3RzIGhhdmUgbG9uZyBsaWZlY3ljbGUsIGFuIHVyYiBjYW4gYmUgcmV1c2Vk IGJldHdlZW4KPj4gc3VibWl0IGxvb3BzOyBUaGUgcHJpdmF0ZSBkYXRhIG5lZWRlZCBieSBzb21l IGhvc3QgY29udHJvbGxlcgo+PiBoYXMgdmVyeSBzaG9ydCBsaWZlY3ljbGUsIHRoZSBtZW1vcnkg aXMgYWxsb2NlZCB3aGVuIGVucXVldWUsIGFuZAo+PiByZWxlYXNlZCB3aGVuIGRlcXVldWUuIEZv ciBleGFtcGxlLCBvbiBhIHN5c3RlbSB3aXRoIHhoY2ksIGluCj4+IHhoY2lfdXJiX2VucXVldWU6 Cj4+IFVzaW5nIGEgVVNCIHdlYmNhbSB3b3VsZCBoYXZlIH4yNTAvcyBtZW1vcnkgYWxsb2NhdGlv bjsKPj4gVXNpbmcgYSBVU0IgbWljIHdvdWxkIGhhdmUgfjFLL3MgbWVtb3J5IGFsbG9jYXRpb247 Cj4+IAo+PiBIaWdoIGZyZXF1ZW50IGFsbG9jYXRpb25zIGZvciBob3N0LWNvbnRyb2xsZXIgcHJp dmF0ZSBkYXRhIGNhbiBiZQo+PiBhdm9pZGVkIGlmIHVyYiB0YWtlIG92ZXIgdGhlIG93bmVyc2hp cCBvZiBtZW1vcnksIHRoZSBtZW1vcnkgdGhlbiBzaGFyZXMKPj4gdGhlIGxvbmdlciBsaWZlY3lj bGUgd2l0aCB1cmIgb2JqZWN0cy4KPj4gCj4+IEFkZCBhIG1lbXBvb2wgdG8gdXJiIGZvciBoY3By aXYgdXNhZ2UsIHRoZSBtZW1wb29sIG9ubHkgaG9sZHMgb25lIGJsb2NrCj4+IG9mIG1lbW9yeSBh bmQgZ3Jvd3Mgd2hlbiBsYXJnZXIgc2l6ZSBpcyByZXF1ZXN0ZWQuCj4+IAo+PiBUaGUgbWVtcG9v bCBpcyBhY3RpdmF0ZWQgb25seSB3aGVuIHRoZSBVUkIgb2JqZWN0IGlzIGNyZWF0ZWQgdmlhCj4+ IHVzYl9hbGxvY191cmIoKSBpbiBjYXNlIHNvbWUgZHJpdmVycyBjcmVhdGUgYSBVUkIgb2JqZWN0 IGJ5IG90aGVyCj4+IG1lYW5zIGFuZCBtYW5hZ2UgaXQgbGlmZWN5Y2xlIHdpdGhvdXQgY29ycmVz cG9uZGluZyB1c2JfZnJlZV91cmIuCj4KPldvbid0IHRoaXMgc3RpbGwgYWxsb2NhdGUgYSBsb3Qg b2YgdW5uZWNlc3NhcnkgbWVtb3J5IGZvciB0aGUgcm9vdGh1YiB1cmJzPwo+aS5lLiB0aGUgb25l cyBxdWV1ZWQgd2l0aCByaF91cmJfZW5xdWV1ZShoY2QsIHVyYikuCj5UaGUgaG9zdCBkcml2ZXJz IGRvbid0IHVzZSB0aGUgdXJiLT5oY3ByaXYgb2YgdGhvc2UgVVJCcy4KPgpUaGUgbWVtcG9vbCBz bG90IGlzIGFsbG9jZWQgb24gZGVtYW5kIHdoZW4gaGNkIHJlcXVlc3QgcHJpdmF0ZSBkYXRhIHdp dGggaXRzIHVyYi4KSWYgYSB1cmIgaXMgIGV2ZXIgdXNlZCBieSBoY2QgYW5kIHRoZSAgaGNkIHJl cXVlc3RzIHByaXZhdGUgZGF0YSB3aXRoIGl0LCBhICBtZW1vcnkgd291bGQgYmUgYWxsb2NlZAph bmQgdGhpcyBtZW1vcnkgd2lsbCBub3QgYmUgcmVsZWFzZWQgdW50aWwgdGhlIHVyYiBpcyBkZXN0 cm95ZWQuCgpJZiB0aG9zZSBVUkIga2VlcHMgYmVpbmcgcmV1c2VkLCB0aGFuIHRoZSBtZW1wb29s IHNsb3Qgd2l0aGluIGl0IGNhbiBiZSByZXVzZWQgYnkgaGNkcyB3aGljaCBnZXQgaG9sZCBvbiBp dC4KCkFuZCB5ZXMsIGl0IGEgVVJCIGlzIHVzZWQgb25seSBvbmNlIG9yIHVzZWQgdmVyeSB1bmZy ZXF1ZW50bHksIGFuZCBoY2QgbmVlZHMgcHJpdmF0ZSBkYXRhIHdpdGggaXQsIHRoZSBtZW1wb29s CnNsb3Qgd291bGQgYmUgYWxsb2NlZCB3aXRoIGl0IGFuZCB3b3VsZCBiZSBhIHZlcnkgdXNlbGVz cyBtZW1wb29sIHNsb3QsIHdhc3RpbmcgbWVtb3J5LgoKPlRoaXMgd291bGQgYmUgdGhlIHJvb3Ro dWIgc3RhdHVzIFVSQiwgYW5kIGV2ZXJ5IGh1YiByZXF1ZXN0IHNlbnQKPmR1cmluZyBkZXZpY2Ug ZW51bWVyYXRpb24gZm9yIGRldmljZXMgY29ubmVjdGVkIHRvIHRoZSByb290aHViLgoKPgo+SXMg dGhpcyB3aG9sZSBVUkIgaGNwcml2IG1lbXBvb2wgYWRkaXRpb24gYW4gYWN0dWFsIGlzc3VlIHRo YXQgbmVlZHMgZml4aW5nPwoKTk8sIG5vdCBhbiBpc3N1ZSwganVzdCBtZWFudCB0byBhdm9pZCBt ZW1vcnkgYWxsb2NhdGlvbnMsIGxvdHMgb2YgYWxsb2NhdGlvbiwgdG8gdGhlb3JldGljYWxseSAg aW1wcm92ZSB0aGluZ3MuLgoKPgo+SWYgeWVzIHRoZW4gSSBzdGlsbCB0aGluayBpdCdzIGJldHRl ciB0byBkbyBpdCBpbiB0aGUgaG9zdCBkcml2ZXIgbGlrZSBJCj5kZXNjcmliZWQgZWFybGllci4g SSBkb24ndCB0aGluayBpdCB3aWxsIGJlIHRvbyBjb21wbGV4Cj4KPlRoYW5rcwo+LU1hdGhpYXMK Pgo+Cg==