From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 59B3151C065; Thu, 15 Oct 2026 13:21:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792070514; cv=none; b=b88xlaNFRPC7gxk/bNDRZvXBdUzmw6OtNghfVVDl1raLqlcbq3FZO+phMsSf4wc4bhd/no9w1KlzO3Dm9Uorp2gvzoRORvuDmty35p2P94PPPec57gCCGsy7OLyepDcYghAzHuw3jDHDfKDQRjQBeoH5x+lJNqRUdPzd5nDm0nA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792070514; c=relaxed/simple; bh=dALrA1GsxC8vVl/exTNWFqaXq/yilSUKsozs8vOLg3I=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oJcKTiAOsY1VBtRL/We5xRpB9zBvJkikKwScMhKGWDdiuNhNjHwR33BkfsRiMLgayNsoj35Ol1KXy/Y7/ZJKzBXxGyPG1CGeMQX/kPM1w0SHKU4IIGhxmj5w+6c+C2H5WT13uIq2IqMbZ6D66PIRqeCRMCt5DsGNO58u4Asn7XU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=FVJFClR4; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="FVJFClR4" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=7R2sAHVr7w2P/QFifakXkPy66wmmGya42yXgvY9Uwls=; b=FVJFClR4MU50janZbmfmYTG/5E sUSrjE/yasd+pkUMEqZWr3W9/EH6TJ/vBjTI7P2UW2NpAfYdoWoYrKzcjPktCbl6GT4GFXmjvNjCN 77naiTCGwBBsFu5qhKReUBcm4g1Ht50WzS63pzON1jRDGBqOxChJjfYmHSiV60j0k/k684s3cQCNQ szzdL3x1Owvf2I0TPYftZ/eGbVVC8FNlIs4sHI8rFbHZkXRp/DF3sCGrxlB0/wegZJgnhB9E7BfCn pjDDpvGVnTlaBWSICdurtDttiVcGLerQLXdDJuX1YeEATVJkih3r0aRW4QTRDmyg1D+YJ2S/6TOPE K/2VJhoA==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.99.5 #2 (Red Hat Linux)) id 1xHLOr-00000000PSr-2AaB; Thu, 15 Oct 2026 13:21:37 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id F2ABB3003DE; Thu, 15 Oct 2026 15:21:35 +0200 (CEST) Date: Thu, 15 Oct 2026 15:21:35 +0200 From: Peter Zijlstra To: Antoine HURET Cc: Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Ravi Bangoria , "linux-perf-users@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "regressions@lists.linux.dev" Subject: Re: [REGRESSION] perf: Rewrite core context handling breaks multiplexed cgroup events Message-ID: <20261015132135.GK4121339@noisy.programming.kicks-ass.net> References: <20261015111316.GJ4121339@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Thu, Oct 15, 2026 at 12:30:55PM +0000, Antoine HURET wrote: > On Thu, Oct 15, 2026 at 11:13 UTC, Peter Zijlstra wrote: > > /me mutters something about having to go install and learn docker and > > what's wrong with simple shells scripts that poke about in /cgroup > > filesystems :-) > > Fair enough, sorry about that! Next time I'll do plain cgroupfs, > promised :-) FWIW, it might be useful to extend perf-test with a bunch of cgroup tests - this one included. AFAICT we have nothing there atm.