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Sun, 22 Sep 2024 16:47:25 +0800 (CST) Date: Sun, 22 Sep 2024 16:47:25 +0800 (CST) From: "David Wang" <00107082@163.com> To: kent.overstreet@linux.dev Cc: linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [BUG?] bcachefs performance: read is way too slow when a file has no overwrite X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT5.0.14 build 20240801(9da12a7b) Copyright (c) 2002-2024 www.mailtech.cn 163com In-Reply-To: <20240922083148.10070-1-00107082@163.com> References: <79f17c7a.65f.19217621c47.Coremail.00107082@163.com> <20240922083148.10070-1-00107082@163.com> X-NTES-SC: AL_Qu2ZBPWSu0Av4yeYZ+kXn0oTju85XMCzuv8j3YJeN500hyX/8xgmcnBuOXvk4sOPLhGSvxe4fyJl+MlZT4xGdLLpf0YaJlFpAJf5Y3zAafAL Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=GBK Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <3fcdf5b3.203d.19218ea100b.Coremail.00107082@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:jCgvCgD3n02e2e9m+90CAA--.27548W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/1tbiMxpiqmbvz7duQQABs+ X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== CkF0IDIwMjQtMDktMjIgMTY6MzE6NDgsICJEYXZpZCBXYW5nIiA8MDAxMDcwODJAMTYzLmNvbT4g d3JvdGU6Cj4+SGksIAo+PgoKPmJ0cmVlX2lvIHdyaXRlIHBhdHRlcm4sIGNvbGxlY3RlZCBmcm9t IGJ0cmVlX25vZGVfd3JpdGVfZW5kaW8sIAo+aXMga2luZCBvZiB1bmlmb3JtL2ZsYXQgZGlzdHJp YnV0ZWQsIG5vdCBvbiBibG9jay1mcmllbmRseSBzaXplCj5ib3VuZGFyaWVzIChJIHRoaW5rKToK PgkrLS0tLS0tLS0tKy0tLS0tLS0tLS0tLSsKPgl8IHNlY3RvcnMgfCBwZXJjZW50YWdlIHwKPgkr LS0tLS0tLS0tKy0tLS0tLS0tLS0tLSsKPgl8ICAgIDEgICAgfCAgIDkuMDIxJSAgIHwKPgl8ICAg IDMgICAgfCAgIDEuNDQwJSAgIHwKPgl8ICAgIDQgICAgfCAgIDEuMjQ5JSAgIHwKPgl8ICAgIDIg ICAgfCAgIDEuMTU3JSAgIHwKPgl8ICAgIDUgICAgfCAgIDAuODA0JSAgIHwKPgl8ICAgIDYgICAg fCAgIDAuNDA5JSAgIHwKPgl8ICAgIDE0ICAgfCAgIDAuMjU5JSAgIHwKPgl8ICAgIDE1ICAgfCAg IDAuMjUzJSAgIHwKPgl8ICAgIDE2ICAgfCAgIDAuMjI4JSAgIHwKPgl8ICAgIDcgICAgfCAgIDAu MjI2JSAgIHwKPgl8ICAgIDExICAgfCAgIDAuMjIzJSAgIHwKPgl8ICAgIDEwICAgfCAgIDAuMjIz JSAgIHwKPgl8ICAgIDEzICAgfCAgIDAuMjIyJSAgIHwKPgl8ICAgIDkgICAgfCAgIDAuMjEzJSAg IHwKPgl8ICAgIDEyICAgfCAgIDAuMjAyJSAgIHwKPgl8ICAgIDQxICAgfCAgIDAuMTk0JSAgIHwK Pgl8ICAgIDE3ICAgfCAgIDAuMTgzJSAgIHwKPgl8ICAgIDggICAgfCAgIDAuMTgyJSAgIHwKPgl8 ICAgIDE4ICAgfCAgIDAuMTY3JSAgIHwKPgl8ICAgIDIwICAgfCAgIDAuMTY3JSAgIHwKPgl8ICAg IDE5ICAgfCAgIDAuMTYzJSAgIHwKPgl8ICAgIDIxICAgfCAgIDAuMTYwJSAgIHwKPgl8ICAgMjA1 ICAgfCAgIDAuMTU4JSAgIHwKPgl8ICAgIDIyICAgfCAgIDAuMTQ1JSAgIHwKPgl8ICAgIDIzICAg fCAgIDAuMTE3JSAgIHwKPgl8ICAgIDI0ICAgfCAgIDAuMDkzJSAgIHwKPgl8ICAgIDUxICAgfCAg IDAuMDg5JSAgIHwKPgl8ICAgIDI1ICAgfCAgIDAuMDgwJSAgIHwKPgl8ICAgMjA0ICAgfCAgIDAu MDc5JSAgIHwKPgkrLS0tLS0tLS0tKy0tLS0tLS0tLS0tLSsKPgoKT29wcy4uLndyb25nIHdlaWdo dCB1c2VkIHRvIGNhbGN1bGF0ZSBwZXJjZW50YWdlLCBpdCBzaG91bGQgYmUKKy0tLS0tLS0tLSst LS0tLS0tLS0tLS0rCnwgc2VjdG9ycyB8IHBlcmNlbnRhZ2UgfAorLS0tLS0tLS0tKy0tLS0tLS0t LS0tLSsKfCAgICAxICAgIHwgIDQ1LjEwNSUgICB8CnwgICAgMyAgICB8ICAgNy4yMDAlICAgfAp8 ICAgIDQgICAgfCAgIDYuMjQ0JSAgIHwKfCAgICAyICAgIHwgICA1Ljc4NSUgICB8CnwgICAgNSAg ICB8ICAgNC4wMTglICAgfAp8ICAgIDYgICAgfCAgIDIuMDQ1JSAgIHwKfCAgICAxNCAgIHwgICAx LjI5NiUgICB8CnwgICAgMTUgICB8ICAgMS4yNjQlICAgfAp8ICAgIDE2ICAgfCAgIDEuMTQxJSAg IHwKfCAgICA3ICAgIHwgICAxLjEyOSUgICB8CnwgICAgMTEgICB8ICAgMS4xMTclICAgfAp8ICAg IDEwICAgfCAgIDEuMTEzJSAgIHwKfCAgICAxMyAgIHwgICAxLjExMSUgICB8CnwgICAgOSAgICB8 ICAgMS4wNjUlICAgfAp8ICAgIDEyICAgfCAgIDEuMDExJSAgIHwKfCAgICA0MSAgIHwgICAwLjk3 MSUgICB8CnwgICAgMTcgICB8ICAgMC45MTMlICAgfAp8ICAgIDggICAgfCAgIDAuOTEyJSAgIHwK fCAgICAxOCAgIHwgICAwLjgzNiUgICB8CnwgICAgMjAgICB8ICAgMC44MzUlICAgfAp8ICAgIDE5 ICAgfCAgIDAuODEyJSAgIHwKfCAgICAyMSAgIHwgICAwLjc5OSUgICB8CnwgICAyMDUgICB8ICAg MC43OTElICAgfAp8ICAgIDIyICAgfCAgIDAuNzI0JSAgIHwKfCAgICAyMyAgIHwgICAwLjU4NyUg ICB8CnwgICAgMjQgICB8ICAgMC40NjUlICAgfAp8ICAgIDUxICAgfCAgIDAuNDQzJSAgIHwKfCAg ICAyNSAgIHwgICAwLjM5OCUgICB8CnwgICAyMDQgICB8ICAgMC4zOTYlICAgfAorLS0tLS0tLS0t Ky0tLS0tLS0tLS0tLSsKCgpEYXZpZAo=