From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from SHSQR01.spreadtrum.com (unknown [222.66.158.135]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2D4CC30F938; Sat, 11 Jul 2026 11:22:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=222.66.158.135 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783768975; cv=none; b=VtyMrh0cXCGFaLTSVjUkRSChiwqzFOGj+QfIDRIaFhRNO+th9cXj+cFm/XaCxOBs1voSzORMG6FpFRk9MXNakElNa0NnLj1+ii6JDM735VLkBFem/PP2i8CHwSozvSAh5UZKuZfaBBJPd9XBBfglLzwT1yEMdI7iePv1crEXqVY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783768975; c=relaxed/simple; bh=D0dwrnSmOBKFI/0heE7SKN6tSLsYQ71yibQoUv3B/yM=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=M4ilcS2GTvNP3Aje/2s4Rhf0OHCTnCqPkYDydlLxiK0KwGCkVhaglyQo6rgwuDxbk2JKH5ydd/fwr3vbwrEzORteuEv0XO7m1kcThwWxPGbCgXFRYUVPev0EuSlSRPEqm+lFRPeyrIcnrKUSAA/vNdaZDA+h41itPrXtJrRsdLM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=unisoc.com; spf=pass smtp.mailfrom=unisoc.com; dkim=pass (2048-bit key) header.d=unisoc.com header.i=@unisoc.com header.b=Tsud9637; arc=none smtp.client-ip=222.66.158.135 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=unisoc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=unisoc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=unisoc.com header.i=@unisoc.com header.b="Tsud9637" Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTPS id 66BBLSuf006507 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sat, 11 Jul 2026 19:21:28 +0800 (+08) (envelope-from kui.sun@unisoc.com) Received: from SHDLP.spreadtrum.com (zeshmbx09.spreadtrum.com [10.29.3.107]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4gy5qL5npcz2PXf5R; Sat, 11 Jul 2026 19:21:02 +0800 (CST) Received: from zeshmbx08.spreadtrum.com (10.29.3.106) by zeshmbx09.spreadtrum.com (10.29.3.107) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Sat, 11 Jul 2026 19:21:26 +0800 Received: from zeshmbx08.spreadtrum.com ([fe80::e01e:2441:3a50:dadb]) by zeshmbx08.spreadtrum.com ([fe80::e01e:2441:3a50:dadb%17]) with mapi id 15.00.1497.048; Sat, 11 Jul 2026 19:21:26 +0800 From: =?utf-8?B?5a2Z6a2BIChLdWkgU3VuKQ==?= To: "'Bart Van Assche'" , Neil Armstrong , Alim Akhtar , "Avri Altman" , "James E.J. Bottomley" , "Martin K. Petersen" , "andre.draszik@linaro.org" CC: Peter Griffin , Tudor Ambarus , Will McVicker , Manivannan Sadhasivam , "kernel-team@android.com" , "linux-samsung-soc@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" , "linux-arm-msm@vger.kernel.org" , =?utf-8?B?5byg5aaC5rOJIChSYWluIFpoYW5nKQ==?= , "cixi.geng@linux.dev" , =?utf-8?B?5ZSQ5pyI5p6XIChZdWVsaW4gVGFuZyk=?= , =?utf-8?B?6ZmI5paH6LaFIChXZW5jaGFvIENoZW4p?= , =?utf-8?B?QW5kcsOpIERyYXN6aWs=?= Subject: =?utf-8?B?562U5aSNOiBbUkZDXSBTaWduaWZpY2FudCBSYW5kb20gSS9PIFBlcmZvcm1h?= =?utf-8?B?bmNlIFJlZ3Jlc3Npb24gaW4gTGludXggS2VybmVsIDYuMTggKFVwIHRvIDI3?= =?utf-8?Q?.7%)_Likely_Caused_by_Commit_3c7ac40d7322?= Thread-Topic: [RFC] Significant Random I/O Performance Regression in Linux Kernel 6.18 (Up to 27.7%) Likely Caused by Commit 3c7ac40d7322 Thread-Index: Ad0PYz14eL5yCSXkTdewaVgxWTlWPgA1fqOAADuDkfA= Date: Sat, 11 Jul 2026 11:21:26 +0000 Message-ID: <7863f3e51a8e4d52acdd24a6aea9cf5f@zeshmbx08.spreadtrum.com> References: <12a8417dc8644a71b9cb25c53c93805a@zeshmbx08.spreadtrum.com> In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted Content-Type: text/plain; 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