From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CD5B2363C5A; Tue, 10 Mar 2026 08:06:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773129974; cv=none; b=c58yMIILfD9Aqz29QVVMC5WT6IFZr0XuxOwhWdtoH2Bix/1Pa35rpoTDDvEvyKAgP1Y9GH2mSs0SnjbdvSj8pLspVEG6WxDumO/hENk4O+z2lo+1vOjn8FKZCHam/nBYFceawwIg7t0CVWAd0k2AU71TmORwvm6EAB4ZN/NvTJc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773129974; c=relaxed/simple; bh=JAl2csVKExJVZNiaSgPkE6Fx7imG+FeCdCMjpeS660A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=XXCYTITkx3BC1vpZ0hAAnUa2xX9peNAnN/AwP3iflNlpa1KgxK85ubWGcXcgEHmHnsDzO2icGm6m2LT9NmKWbB8CSXsxrasRed0evwrTHtztzfoIONidkgAgt/iTJPD30H9eyycsBNnvAxfaIMEoEOaZZaJrEbwA9ntFMu4oASk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i9KoiDn8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="i9KoiDn8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79652C19423; Tue, 10 Mar 2026 08:06:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773129974; bh=JAl2csVKExJVZNiaSgPkE6Fx7imG+FeCdCMjpeS660A=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=i9KoiDn8U9BTpvHz6PCznPky0OU+TKakgXxXQRs3Z/W1xpzGuzdMqRs/5+6D1XdKG chPddQQTMb6IHcEfNFCrfCFTs9CSjp+Z8S3P2EHAU05fRINmoo4KhPu+TEjyNQJ2z+ Cn0gdRARHoAF76k9G5PZqS0X8j9Mh1U2MSDUsHXfr0NgvrBnFZI4YM+g0jOTV9SStf 478/qLOgUHtshcC7hOyQ97qF20WMXJQkugPn7ffnAF+HDXJ4NbxVuc31KSVgKEt9/q PKfXswwGxg7UIE+N8JqsVJKTS2LX2OYKT1kOZ2zLTe3eesUoXq0pNGEKBqUoDvO/WK t4oL0Ksnhr6bA== Message-ID: Date: Tue, 10 Mar 2026 09:06:09 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 6.19 027/844] perf metricgroup: Don't early exit if no CPUID table exists To: Sasha Levin , Ian Rogers Cc: Greg KH , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Leo Yan , Adrian Hunter , Alexander Shishkin , Ingo Molnar , James Clark , Jiri Olsa , Namhyung Kim , Peter Zijlstra , Arnaldo Carvalho de Melo References: <20260228173244.1509663-1-sashal@kernel.org> <20260228173244.1509663-28-sashal@kernel.org> <072e2a07-5c6f-47b5-9695-0a3ffe854ac8@kernel.org> <2026030924-recount-halved-605d@gregkh> Content-Language: en-US From: Jiri Slaby Autocrypt: addr=jirislaby@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 09. 03. 26, 15:57, Sasha Levin wrote: > On Mon, Mar 09, 2026 at 07:53:10AM -0700, Ian Rogers wrote: >> On Mon, Mar 9, 2026 at 6:40 AM Greg KH >> wrote: >>> >>> On Mon, Mar 09, 2026 at 08:40:33AM +0100, Jiri Slaby wrote: >>> > On 28. 02. 26, 18:19, Sasha Levin wrote: >>> > > From: Ian Rogers >>> > > >>> > > [ Upstream commit cee275edcdb1acfdc8270f80e96f30750b633220 ] >>> > >>> > This breaks (userspace) perf: >>> > $ ./perf stat -a -d -p 1 sleep 5 >>> > PID/TID switch overriding SYSTEM >>> > Error: >>> > No supported events found. >>> > >>> > Any ideas? >>> >>> Is it also broken in 7.0-rc3?  Or is this only a 6.19.y issue? It's broken in linus/master too. >> There was a fix: >> https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools- >> next.git/commit/tools/perf/util/metricgroup.c?h=perf-tools- >> next&id=c5a244bf17caf2de22f9e100832b75f72b31d3e6 >> was that applied to 6.19.y? > > It's not even upstream yet :) Right. (And it fixes the issue.) thanks, -- js suse labs