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Thu, 8 May 2025 02:19:34 +0800 (CST) Date: Thu, 8 May 2025 02:19:34 +0800 (CST) From: "David Wang" <00107082@163.com> To: surenb@google.com, kent.overstreet@linux.dev, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re:[PATCH] alloc_tag: avoid mem alloc and iter reset when reading allocinfo 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: <20250507175500.204569-1-00107082@163.com> References: <20250507175500.204569-1-00107082@163.com> X-NTES-SC: AL_Qu2fBPqfvkEs4iGaZOkXn0oTju85XMCzuv8j3YJeN500uSTXywcqW29JPUDfws6QOyusoAiQdzRj4/R6caldXIAxrCzA3ipq/U8yZiVSG0Z1 Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=GBK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: X-Coremail-Locale: zh_CN X-CM-TRANSID:aygvCgBHj6A3pBtoYZ+mAA--.54758W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/xtbBkB5GqmgbnJg6CwAEsg X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== SGksIApKdXN0IHdhbnQgdG8gc2hhcmUgaG93IEkgbm90aWNlIHRob3NlIG1lbW9yeSBhbGxvY2F0 aW9uIGJlaGFpdm9yczogdGhlIGN1bXVsYXRpdmUgY291bnRlcnN+IQoKV2l0aCBjdW11bGF0aXZl IGNvdW50ZXJzLCBJIGNhbiBpZGVudGlmeSB3aGljaCBtb2R1bGUga2VlcHMgYWxsb2MvZnJlZSBt ZW1vcnksIGJ5IHRoZSByYXRpbyBiZXR3ZWVuCiBjdW11bGF0aXZlIGNhbGxzIGFuZCByZW1haW5p bmcgY2FsbHMsIGFuZCBtYXliZSBhbiBvcHRpbWl6YXRpb24gY291bGQgYmUgYXBwbGllZC4KRm9s bG93aW5nIGlzIHRvcDE2IEkgZ290IG9uIG15IHN5c3RlbToKCistLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLSstLS0tLS0tKy0tLS0tLS0tLS0tLS0tLS0tLSstLS0tLS0t LS0tLS0tLS0tLS0tLSsKfCAgICAgICAgICAgICAgICAgIGFsbG9jICAgICAgICAgICAgICAgICAg fCBjYWxscyB8IGN1bXVsYXRpdmUgY2FsbHMgfCAgICAgICByYXRpbyAgICAgICAgfAorLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0rLS0tLS0tLSstLS0tLS0tLS0tLS0t LS0tLS0rLS0tLS0tLS0tLS0tLS0tLS0tLS0rCnwgICAgICAgICAgICBmcy9zZXFfZmlsZS5jOjU4 NCAgICAgICAgICAgIHwgICAyICAgfCAgICAgMTgwNjQ4MjUgICAgIHwgICAgIDkwMzI0MTIuNSAg ICAgIHwKfCAgICAgICAgICAgICBmcy9zZXFfZmlsZS5jOjM4ICAgICAgICAgICAgfCAgIDUgICB8 ICAgICAxODE0ODI4OCAgICAgfCAgICAgMzYyOTY1Ny42ICAgICAgfAp8ICAgICAgICAgICAgIGZz L3NlcV9maWxlLmM6NjMgICAgICAgICAgICB8ICAgMTUgIHwgICAgIDE4MTUzMjcxICAgICB8IDEy MTAyMTguMDY2NjY2NjY2NyB8CnwgICAgICAgICAgbmV0L2NvcmUvc2tidWZmLmM6NTc3ICAgICAg ICAgIHwgICA5ICAgfCAgICAgMTA2Nzk5NzUgICAgIHwgMTE4NjY2My44ODg4ODg4ODkgIHwKfCAg ICAgICAgICBuZXQvY29yZS9za2J1ZmYuYzo2NTggICAgICAgICAgfCAgIDIxICB8ICAgICAxMTAx MzQzNyAgICAgfCAgNTI0NDQ5LjM4MDk1MjM4MSAgfAp8ICAgICAgICAgICAgIGZzL3NlbGVjdC5j OjE2OCAgICAgICAgICAgICB8ICAgNyAgIHwgICAgIDI4MzEyMjYgICAgICB8IDQwNDQ2MC44NTcx NDI4NTcxNiB8CnwgICAgICAgICAgICBsaWIvYWxsb2NfdGFnLmM6NTEgICAgICAgICAgIHwgICAx ICAgfCAgICAgIDM0MDY0OSAgICAgIHwgICAgICAzNDA2NDkuMCAgICAgIHwgIDwtLS0gSGVyZSBJ IHN0YXJ0ZWQKfCAgICAgICAgICAga2VybmVsL3NpZ25hbC5jOjQ1NSAgICAgICAgICAgfCAgIDEg ICB8ICAgICAgMzAwNzMwICAgICAgfCAgICAgIDMwMDczMC4wICAgICAgfAp8IGZzL25vdGlmeS9p bm90aWZ5L2lub3RpZnlfZnNub3RpZnkuYzo5NiB8ICAgMSAgIHwgICAgICAyNDk4MzEgICAgICB8 ICAgICAgMjQ5ODMxLjAgICAgICB8CnwgICAgICAgICAgICBmcy9leHQ0L2Rpci5jOjY3NSAgICAg ICAgICAgIHwgICAzICAgfCAgICAgIDUxOTczNCAgICAgIHwgMTczMjQ0LjY2NjY2NjY2NjY2IHwK fCAgICAgICBkcml2ZXJzL3VzYi9ob3N0L3hoY2kuYzoxNTU1ICAgICAgfCAgIDQgICB8ICAgICAg MTI2NDAyICAgICAgfCAgICAgIDMxNjAwLjUgICAgICAgfAp8ICAgICAgICAgICAgICBmcy9sb2Nr cy5jOjI3NSAgICAgICAgICAgICB8ICAgMzYgIHwgICAgICA5ODY5NTcgICAgICB8IDI3NDE1LjQ3 MjIyMjIyMjIyMyB8CnwgICAgICAgICAgIGZzL3Byb2MvaW5vZGUuYzo1MDIgICAgICAgICAgIHwg ICAzICAgfCAgICAgIDYzNzUzICAgICAgIHwgICAgICAyMTI1MS4wICAgICAgIHwKfCAgICAgICAg ICAgICAgZnMvcGlwZS5jOjEyNSAgICAgICAgICAgICAgfCAgMTIzICB8ICAgICAyMTQzMzc4ICAg ICAgfCAxNzQyNS44MzczOTgzNzM5ODQgfAp8ICAgICAgICAgICAgbmV0L2NvcmUvc2NtLmM6ODQg ICAgICAgICAgICB8ICAgMyAgIHwgICAgICA0MzI2NyAgICAgICB8IDE0NDIyLjMzMzMzMzMzMzMz NCB8CnwgICAgICAgICBmcy9rZXJuZWxfcmVhZF9maWxlLmM6ODAgICAgICAgIHwgICAyICAgfCAg ICAgIDI2OTEwICAgICAgIHwgICAgICAxMzQ1NS4wICAgICAgIHwKKy0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tKy0tLS0tLS0rLS0tLS0tLS0tLS0tLS0tLS0tKy0tLS0t LS0tLS0tLS0tLS0tLS0tKwoKSSB0aGluayB0aGlzIGlzIGFub3RoZXIgImdvb2QiIHVzYWdlIGZv ciBjdW11bGF0aXZlIGNvdW50ZXJzOiBpZiBhIG1vZHVsZSBqdXN0IGtlZXBzIGFsbG9jL2ZyZWUg bWVtb3J5LAptYXliZSBpdCBpcyBnb29kIHRvIG1vdmUgdGhlIG1lbW9yeSBhbGxvYy9mcmVlIHRv IHNvbWV3aGVyZSBsZXNzIGZyZXF1ZW50LgoKSW4gdGhlIGNhc2Ugb2YgdGhpcyBwYXRjaCwgYSBt ZW1vcnkgYWxsb2NhdGlvbiBmb3IgZWFjaCByZWFkLWNhbGxzLCBjYW4gYmUgbW92ZWQgdG8gb3Bh bi1jYWxscy4KCklmIGludGVyZXN0ZWQsIEkgY2FuIHJlLXNlbmQgdGhlIHBhdGNoIGZvciBjdW11 bGF0aXZlIGNvdW50ZXJzIGZvciBmdXJ0aGVyIGRpc2N1c3Npb25zLgoKCkZZSQpEYXZpZA==