Received: by 2002:ab2:68c1:0:b0:1fd:9a81:d0e4 with SMTP id e1csp246866lqp; Sat, 8 Jun 2024 14:37:03 -0700 (PDT) X-Forwarded-Encrypted: i=3; AJvYcCU7/xVmr0ijkkzOHp/vARoCdnDZs05jOhH11QUzcAcOIIYU/hMtLnssAhKSJ2OqYyJbkZDpKwGjtTPF2gsWVIIwIO61CXgMCjlB6B7Ucg== X-Google-Smtp-Source: AGHT+IGVtw4ktApqdbUG+XvPVbIZ1uLhZRzReCdPWZbe1qxwI0JbmlWwLkOD1I5utjzaB3kc9RYh X-Received: by 2002:a05:6358:7e13:b0:192:b048:2942 with SMTP id e5c5f4694b2df-19f1ffa1258mr646386555d.30.1717882623353; Sat, 08 Jun 2024 14:37:03 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1717882623; cv=pass; d=google.com; s=arc-20160816; b=HfK1EovM6WiM4g8ZB/eWr0l/RustXHHQT10oQK0Gs9ZWNeJwtvjxkm4pLCQg6kLcn9 VRgxqoCkiq4SbpGkUrq0AQ1C/s4KcYQDSnWU8TKef77ynNo33zgZG9KYceFyALMnXSuG TqOu6NvL2eLAoQopyBPBviZPQU7ZKXCe40WeKY+DU+xkxTbCttgVVrd6q7ZHD4a8G1Cb hWPhg/DJrxPvS1NCLKCsb0koK71GHxGoG/3/lPRQcfZaDNl4EwFxqg/QHiNh2/xsIHmY ZpagKke8xkBbh7lhHTRTKdQuWBO25kbQwvmxNzmx8yLsPXY89vhrBEQ5zZukBAWWHzCl rMUw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:mime-version :list-unsubscribe:list-subscribe:list-id:precedence:accept-language :in-reply-to:references:message-id:date:thread-index:thread-topic :subject:cc:to:from; bh=ckWyIeSdsDvmQmA7Uur7mW2LMT+TmsIo3QCKCFSBqSM=; fh=E+wKHL115xkdqfospJPWjfRzT/hSu0VHmWG5rcknWto=; b=L13MKPXoPnpLfeQhBOTfSg+20Lq/0WLQlxeGsnHdQI0gS01jI1SwDw/MtuhLRH2WR0 CmaRalMnptZRMu2rUdDsgMk1JanuC+7LidxDMhm8hGU4wHSzasmCjv9Yc5T1FcKsiE0a 0vkYdQPqkaIxIYXg6DgST+ABQAwtEdsrxtEwGJJ5UFaW2yIiAo+9GfZUj7CbuARmWy05 wRUJMdvKTNNpnQLaz+alwmDjgaIQ2OR+OTRfHgVUoaRgrmDDx17xWw8UhkHIFkdTlsLK qKz7I/B5k0EwkBa1y+GR113S0P0KsSVILhlpBDw8vJjOMYqA0MCISLYbL+5FjBC6AC3F cCag==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; arc=pass (i=1 spf=pass spfdomain=aculab.com dmarc=pass fromdomain=aculab.com); spf=pass (google.com: domain of linux-kernel+bounces-207208-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) smtp.mailfrom="linux-kernel+bounces-207208-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Return-Path: Received: from sy.mirrors.kernel.org (sy.mirrors.kernel.org. [147.75.48.161]) by mx.google.com with ESMTPS id 41be03b00d2f7-6e8502ede63si1332512a12.611.2024.06.08.14.37.02 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 08 Jun 2024 14:37:03 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-207208-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) client-ip=147.75.48.161; Authentication-Results: mx.google.com; arc=pass (i=1 spf=pass spfdomain=aculab.com dmarc=pass fromdomain=aculab.com); spf=pass (google.com: domain of linux-kernel+bounces-207208-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) smtp.mailfrom="linux-kernel+bounces-207208-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sy.mirrors.kernel.org (Postfix) with ESMTPS id 04E2BB20CA6 for ; Sat, 8 Jun 2024 21:36:45 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 59D4023749; Sat, 8 Jun 2024 21:36:37 +0000 (UTC) Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) (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 AF48A1D531 for ; Sat, 8 Jun 2024 21:36:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.58.86.151 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717882596; cv=none; b=J5c344ycMc5igUyWOj4SK9EHQXGJyRyo7sjixZDhEdaFIzsDSoPTTp/SNf5U7H2ik0XS7flU+HFFj/1ccP3fvIA2Xe8awPRgeDLEuVJHHiqLGyYt4mFEjJ+VA9JERxtNGdxlqHzxEZ/3TOvrDaCLK9C8o5bUX7mD/+ziYuYdupI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717882596; c=relaxed/simple; bh=ckWyIeSdsDvmQmA7Uur7mW2LMT+TmsIo3QCKCFSBqSM=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: MIME-Version:Content-Type; b=taJKUO9sk1Sbhgol3tMml0p1SbCCogH/BWlXekbU3g7vnV5kEzv9dN8QxXewgANSRlMvLQ7V9qKdHRDLE8wUbrCFROREPcTWVHYoVnLANcUYbFFHHvuZpiD2KSd/vFvHYQHTE0QIMcuCkYuz/iwRlJVfVts1JnG/z1TUO8TvBh8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ACULAB.COM; spf=pass smtp.mailfrom=aculab.com; arc=none smtp.client-ip=185.58.86.151 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ACULAB.COM Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aculab.com Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-309-5ESWHAR6MZqEhqVHYHE5zQ-1; Sat, 08 Jun 2024 22:36:24 +0100 X-MC-Unique: 5ESWHAR6MZqEhqVHYHE5zQ-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Sat, 8 Jun 2024 22:35:48 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Sat, 8 Jun 2024 22:35:48 +0100 From: David Laight To: 'Linus Torvalds' CC: Linux Kernel Mailing List Subject: RE: Linux 6.10-rc2 - massive performance regression Thread-Topic: Linux 6.10-rc2 - massive performance regression Thread-Index: Adq5okQ7HduYf8qJTJSPwCpAtFdr/wAEqzOAAAzamAA= Date: Sat, 8 Jun 2024 21:35:48 +0000 Message-ID: References: <46cb50d65e414bfd9bef5549d68ae4ea@AcuMS.aculab.com> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMDggSnVuZSAyMDI0IDE3OjAzDQo+IA0KPiBP biBTYXQsIDggSnVuIDIwMjQgYXQgMDc6NDQsIERhdmlkIExhaWdodCA8RGF2aWQuTGFpZ2h0QGFj dWxhYi5jb20+IHdyb3RlOg0KPiA+DQo+ID4gSSBzdXNwZWN0IGl0IGlzIGR1ZSB0byB0aGUgY2hh bmdlcyB0byB0aGUgd2F5IHRoZSBzY2hlZHVsZXIgcHJlLWVtcHRzDQo+ID4gcHJvY2Vzc2VzLg0K PiANCj4gVGhlIFBSRUVNUFRfQVVUTyBjaGFuZ2VzIGhhdmVuJ3QgZXZlbiBtYWRlIGl0IGludG8g dGhlIGtlcm5lbCB5ZXQsDQo+IG9ubHkgYSBjb3VwbGUgb2YgcHJlbGltaW5hcnkgcmN1IHBhdGNo ZXMgdGhhdCBhcmVuJ3QgcmVsZXZhbnQgeWV0Lg0KPiANCj4gU28gd2hpbGUgdGhlcmUncyBiZWVu IHNvbWUgc2NoZWR1bGVyIGNoYW5nZXMgaW4gNi4xMCwgdGhleSBoYXZlIG1vc3RseQ0KPiBiZWVu IHByZXR0eSBpbnNpZ25pZmljYW50IC0gbW9zdGx5IHNvbWUgcmVuYW1pbmcgd2l0aG91dCBmdW5j dGlvbmFsDQo+IGNoYW5nZXMsIGFuZCBvbmUtbGluZXJzLg0KPiANCj4gT2J2aW91c2x5IGV2ZW4g YSBvbmUtbGluZXIgY2FuIGVuZCB1cCByZXN1bHRpbmcgaW4gcmFuZG9tIG9kZGl0aWVzLA0KPiBi dXQgY291bGQgeW91IHRyeSB0byBiaXNlY3QgdGhlIGlzc3VlIHlvdSBzZWUgdG8gcGluIGl0IGRv d24/DQoNCkknbGwgdHJ5IHRvIHJlbWVtYmVyIGhvdyB0byBiaXNlY3QgdGhyb3VnaCB0aGUgbWVy Z2UgOi0pDQoNCkkndmUgZG9uZSBzb21lIHRlc3RzLg0KSSdtIHNlZWluZyBhIHRocmVlLWZvbGQg c2xvdyBkb3duIG9uOg0KJCBpPTA7IHdoaWxlIFsgJGkgLWx0IDEwMDAwMDAgXTsgZG8gaT0kKChp ICsgMSkpOyBkb25lDQp3aGljaCBnb2VzIGZyb20gMSBzZWNvbmQgdG8gMy4NCg0KSSBjYW4gcnVu IHRoYXQgd2l0aCBmdHJhY2UgbW9uaXRvcmluZyBzY2hlZHVsZXIgZXZlbnRzIChhbmQgYSBmZXcN Cm90aGVyIHRoaW5ncykgYW5kIGNhbid0IHNwb3QgYW55d2hlcmUgdGhlIHByb2Nlc3MgaXNuJ3Qg cnVubmluZw0KZm9yIGEgc2lnbmlmaWNhbnQgdGltZS4NCg0KSSd2ZSBqdXN0IGhhZCBhIHRob3Vn aHQuDQpIYXZlIHRoZXJlIGJlZW4gYW55IGNoYW5nZXMgdG8gdGhlIGNvZGUgdGhhdCBjaGFuZ2Vz IHRoZSBjcHUgc3BlZWQNCmFuZC9vciBzY2hlZHVsZXIgZGVjaXNpb25zIGZvciBtaWdyYXRpbmcg cHJvY2Vzc2VzPw0KDQpJdCBtaWdodCBiZSB0aGF0IHRoZSBidXN5IHNpbmdsZSBwcm9jZXNzIGtl ZXBzIG9uIGJlaW5nIG1pZ3JhdGVkDQp0byBhbiBpZGxlIGNwdSB0aGF0IGlzIHJ1bm5pbmcgYXQg ODAwTUh6IHJhdGhlciB0aGFuIHN0YXlpbmcgb24NCmEgY3B1IGFuZCBnZXR0aW5nIGl0cyBzcGVl ZCByYW1wZWQgdXAgdG8gMy41LTRHSHoNCg0KSSBjYW4gc3BlZWQgdGhlIHNoZWxsIGxvb3AgdXAg dG8ganVzdCBvdmVyIDIgc2Vjb25kcyBieSBydW5uaW5nDQphIGZldyBjb3BpZXMgb2Y6DQokIHdo aWxlIDo7IGRvIDo7IGRvbmUNClRoYXQgbWlnaHQgYmUgdGhlIGJlc3QgSSBjYW4gZ2V0IHNpbmNl IEknbSB1c2luZyBhbiBpNy03NzAwICg0IGNvcmVzDQp3aXRoIGh5cGVydGhyZWFkaW5nIGdpdmlu ZyA4IGNwdSkgYW5kIGh5cGVydGhyZWFkaW5nIHByb2JhYmx5IHNsb3dzDQp0aGluZ3MgZG93biBi eSBhIGZhY3RvciBvZiB0d28uDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFr ZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwg VUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=