From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2E0EC7EE2D for ; Mon, 5 Jun 2023 10:17:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230188AbjFEKRV (ORCPT ); Mon, 5 Jun 2023 06:17:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231854AbjFEKRS (ORCPT ); Mon, 5 Jun 2023 06:17:18 -0400 Received: from mail-lf1-x12b.google.com (mail-lf1-x12b.google.com [IPv6:2a00:1450:4864:20::12b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0AFCA100 for ; Mon, 5 Jun 2023 03:17:14 -0700 (PDT) Received: by mail-lf1-x12b.google.com with SMTP id 2adb3069b0e04-4f50470d77cso5674223e87.0 for ; Mon, 05 Jun 2023 03:17:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1685960232; x=1688552232; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=TL8FrjBvLOB0J2ckzU5zDN3LDIwLONem+iih3uE7XWU=; b=ebkFPWdYNLaMUho9qkYIBITcTiBJ2nApjX+DQB0ZJVhlPjub8qj1PnFJA57FRIbhTh Z7Wg1ON57LiP5SF4kl0tH4W3es3l5CoZ/SNPFRmm189Z84uxrT68h0WxfQlGEyUT8Vc1 BDMYxXGo/IzdFNVayXgK5Yrn3yfwgDaxWCxsN/GLhtUDy/+FnO0F6gTrbOn5banDbteP rFYM2TsS5omPUt3Rb9qjv/YrvC1YtrCWDZ8vB6cSf7hZE7RP2t62jTmTGCxCAYbOkZ18 uzVi3DTe5rusrudnAQqcVkLSNnZWUtKQlyZMQ1AeRYAxdqHHQjjY4RfCm6Fhn2ZmaOjf H17w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685960232; x=1688552232; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=TL8FrjBvLOB0J2ckzU5zDN3LDIwLONem+iih3uE7XWU=; b=WhvPNdncDfEaJIlum/9aIttiJB85guWLKAGCyWlq6QNsSHwjbpwNFW5Y+17QAC2QA3 8tLzIvcpRCr288HPaypl+kAtyb2DH8eM3cbfR8n1f1vsJq4JRQdemYFdPpmO3OJUdlrc gwANM+2sF1IQbHvrdKKIGXDRiUFUAX98R7MXy43wAMsy2aGWDIAtzXA6PHZkfE5GtRpm QzGOLSkaAtAAqHByrZkPcN6TgdQOPmB6mg/nAjTxU7QWN8mE3LWikrVuPnSJYeU85dzt M6TKB0UsHdNi+4hkH+r3gH5RW2strBGLak9hy5Ib3BEwqYdkXubJ7mUrnxQe5R1i8ZWW q6vA== X-Gm-Message-State: AC+VfDwgnTa/trcxx91jHg1z5xQ5xYD1NuJkhBTH7uWM+sRM+m5VnN3W vWUJqEwFu3aAQfR+prxDLD73YYR75nfyA8XIYEs= X-Google-Smtp-Source: ACHHUZ5f5CSb1CXsNeNN9VuNkuNB/1isot/4az07Iw1a4lCB2CL9zour0PLPocTC3rUSKLr/qvO9fg== X-Received: by 2002:a19:ac02:0:b0:4f3:b222:1eed with SMTP id g2-20020a19ac02000000b004f3b2221eedmr4624466lfc.2.1685960232283; Mon, 05 Jun 2023 03:17:12 -0700 (PDT) Received: from [192.168.1.20] ([178.197.219.26]) by smtp.gmail.com with ESMTPSA id bm11-20020a0564020b0b00b00514b2717ec6sm3766757edb.28.2023.06.05.03.17.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Jun 2023 03:17:11 -0700 (PDT) Message-ID: Date: Mon, 5 Jun 2023 12:17:09 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.2 Subject: Re: [REGRESSION][BISECT] perf/core: Remove pmu linear searching code Content-Language: en-US To: Peter Zijlstra , Mark Rutland Cc: Ravi Bangoria , jolsa@kernel.org, irogers@google.com, bp@alien8.de, adrian.hunter@intel.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, "linux-samsung-soc@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "regressions@lists.linux.dev" References: <3abd3693-ad87-9abf-a762-337076638fcc@linaro.org> <20230605092731.GZ4253@hirez.programming.kicks-ass.net> <20230605101401.GL38236@hirez.programming.kicks-ass.net> From: Krzysztof Kozlowski In-Reply-To: <20230605101401.GL38236@hirez.programming.kicks-ass.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/06/2023 12:14, Peter Zijlstra wrote: > On Mon, Jun 05, 2023 at 11:27:31AM +0200, Peter Zijlstra wrote: > >> That said; given that this commit has been tagged twice now, I suppose I >> should go revert it and we'll try again after a more thorough audit. > > I'll go queue this then... > > --- > Subject: perf: Re-instate the linear PMU search > From: Peter Zijlstra > Date: Mon Jun 5 11:42:39 CEST 2023 > > Full revert of commit 9551fbb64d09 ("perf/core: Remove pmu linear > searching code"). > > Some architectures (notably arm/arm64) still relied on the linear > search in order to find the PMU that consumes > PERF_TYPE_{HARDWARE,HW_CACHE,RAW}. > > This will need a more thorought audit and clean. > > Reported-by: Nathan Chancellor > Reported-by: Krzysztof Kozlowski Thanks. Best regards, Krzysztof