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Thu, 8 May 2025 11:35:11 +0800 (CST) Date: Thu, 8 May 2025 11:35:11 +0800 (CST) From: "David Wang" <00107082@163.com> To: "Kent Overstreet" Cc: "Suren Baghdasaryan" , akpm@linux-foundation.org, 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: References: <20250507175500.204569-1-00107082@163.com> <289b58f1.352d.196addbf31d.Coremail.00107082@163.com> X-NTES-SC: AL_Qu2fBPqcuksq5yCYYukZnEYQheY4XMKyuPkg1YJXOp80lyTS1i8PZ25IJ2Ls0fmBKwSmoQmJUCZj9eRhRIVjWqgFK3ytXkkVok9qRhKNuA7h 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: <1ed4c8f7.3e12.196adf621a2.Coremail.00107082@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:fygvCgD3_6hwJhxofp2mAA--.57328W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/xtbBkAJHqmgcH4DcLgABsn X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== CgpBdCAyMDI1LTA1LTA4IDExOjMxOjEyLCAiS2VudCBPdmVyc3RyZWV0IiA8a2VudC5vdmVyc3Ry ZWV0QGxpbnV4LmRldj4gd3JvdGU6Cj5PbiBUaHUsIE1heSAwOCwgMjAyNSBhdCAxMTowNjozNUFN ICswODAwLCBEYXZpZCBXYW5nIHdyb3RlOgo+PiBUaGFua3MgZm9yIHRoZSBmZWVkYmFja34KPj4g SSBhZ3JlZSB0aGF0IG1lbW9yeSBhbGxvY2F0aW9uIG5vcm1hbGx5IGRvc2Ugbm90IHRha2UgbWFq b3IgcGFydCBvZiBhIHByb2ZpbGluZyByZXBvcnQsCj4+IGV2ZW4gcHJvZmlsaW5nIGEgZmlvIHRl c3QsIGttZW1fY2FjaGVfYWxsb2Mgb25seSB0YWtlcyB+MSUgcGVyZiBzYW1wbGVzLgo+PiAKPj4g SSBkb24ndCBrbm93IHdoeSBJIGhhdmUgdGhpcyAidGhlIGxlc3MgbWVtb3J5IGFsbG9jYXRpb24s IHRoZSBiZXR0ZXInIG1pbmRzZXQsICBtYXliZQo+PiBJIHdhcyB3b3JyeWluZyBhYm91dCBtZW1v cnkgZnJhZ21lbnRhdGlvbiwgb3Igc29tZXRoaW5nIGVsc2UgSSAgbGVhcm5lZCBvbiBzb21lICJ0 ZXh0Ym9vayIsCj4+IFRvIGJlIGhvbmVzdCwgSSAgaGF2ZSBuZXZlciBoYWQgcmVhbCBleHBlcmll bmNlIHdpdGggdGhvc2Ugd29ycmllcy4uLi4KPgo+SXQncyBhIGNvbW1vbiBiaWFzLiAiTWVtb3J5 IGFsbG9jYXRpb25zIiB0YWtlIHVwIGEgbG90IG9mIGNvbmNlcHR1YWwKPnNwYWNlIGluIG91ciBo ZWFkcywgYW5kIGdlbmVyYWxseSBmb3IgZ29vZCByZWFzb24gLSBpLmUuIGhhbmRsaW5nIG1lbW9y eQo+YWxsb2NhdGlvbiBlcnJvcnMgaXMgb2Z0ZW4gYSBtYWpvciBjb25jZXJuLCBhbmQgeW91IGRv IGFsd2F5cyB3YW50IHRvIGJlCj5hd2FyZSBvZiBtZW1vcnkgbGF5b3V0Lgo+Cj5CdXQgdGhpcyBj YW4gdHVybiBpbnRvIGFuIGF2ZXJzaW9uIHRoYXQncyBlbnRpcmVseSBkaXNwcm9wb3J0aW9uYXRl IC0KPmUuZy4gdXNpbmcgbGlua2VkIGxpbmtlZCBsaXN0cyBhbmQgZml4ZWQgc2l6ZSBhcnJheXMg aW4gd2F5cyB0aGF0IGFyZQo+ZW50aXJlbHkgaW5hcHByb3ByaWF0ZSwgaW5zdGVhZCBvZiB2ZWN0 b3JzIGFuZCBvdGhlciBiZXR0ZXIgZGF0YQo+c3RydWN0dXJlczsgZ29vZCBkYXRhIHN0cnVjdHVy ZXMgYWx3YXlzIHJlcXVpcmUgYWxsb2NhdGlvbnMuCj4KPlByb2ZpbGUsIHByb2ZpbGUsIHByb2Zp bGUsIGFuZCByZW1lbWJlciB5b3VyIGJhc2ljIENTIChiaWcgTyBub3RhdGlvbikgLQo+OTAlIG9m IHRoZSB0aW1lLCBzaW1wbGUgY29kZSB3aXRoIGdvb2QgYmlnIE8gcnVubmluZyB0aW1lIGlzIGFs bCB5b3UKPm5lZWQuCgpjb3B5IHRoYXR+IQoKVGhhbmtzCkRhdmlkCg==