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 47C3C2ECD3A; Fri, 24 Oct 2025 09:29:42 +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=1761298185; cv=none; b=QqLxLpxuYLggNuuBhWSEZmaK7uStgReq46O/n9XHTR9HuqaOAF1eZ/IRgC1U/zdEB10Q1EdSCKv1AAEgRMf65bRLGKsloxUMEI1RFPNkED0BPrkw9PCrVKy3Qdm2dnRN7cr8niZVlww4qGZADAjY8a9Ebk5KHmVXcFntj4iQTBc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761298185; c=relaxed/simple; bh=JF76XAoKNVO9L4nQszY7FwGTkQ7OLRInClINm+CWxbM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QnpgHNbNM0SO8H/IVSD/YmX9ZjzT+RZ5Ng9Xnsn58m8T2dTARKTlG3UzwxJNjc3KqjtNwSWhPZCzDON8vbHExTcNkQyeK1cEv2eEKSQJJ0r+YWQhKwiS90HTdGDhqT6NYswkoRJiRmBgwO0NKMKtnQJbEUeNv7XxZXqnK5zgjoc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=ZY59KGDu; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none 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="ZY59KGDu" 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=JF76XAoKNVO9L4nQszY7FwGTkQ7OLRInClINm+CWxbM=; b=ZY59KGDuwstrgRFBJR+P2Ayry/ DaCwQeivOdMAlLCDL2WwKV0f3CeU7V3UG0jXw0BOhkQiU/6bVBcfeOrcMvjm2l1zlDr/cTqpSNEUB UGhIRTW+ISKP7PY15HTRRQYwGwNo2eV8VSzZmUOtFi9qBzY18+djW1+K8uLnbiA+pRgxNRVFmU31d sguSvcz2oau1XATy93UIkqoZcC0UkbHrPuQUBVhaIUD6t23LMCdYQZFkIezTjVnxUk87jYB52azrd MXkOQPaYqifMtZF956NVEJ9r/wLuLVkit1YHUVQJeH9XBucchNmA4G0ngwyzBfa4CMWixQO/yQKih R64Ow8eA==; 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 4.98.2 #2 (Red Hat Linux)) id 1vCDFJ-00000002AZn-2LKC; Fri, 24 Oct 2025 08:34:01 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 1257730023C; Fri, 24 Oct 2025 11:29:26 +0200 (CEST) Date: Fri, 24 Oct 2025 11:29:26 +0200 From: Peter Zijlstra To: Steven Rostedt Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, x86@kernel.org, Masami Hiramatsu , Mathieu Desnoyers , Josh Poimboeuf , Ingo Molnar , Jiri Olsa , Arnaldo Carvalho de Melo , Namhyung Kim , Thomas Gleixner , Andrii Nakryiko , Indu Bhagat , "Jose E. Marchesi" , Beau Belgrave , Jens Remus , Linus Torvalds , Andrew Morton , Florian Weimer , Sam James , Kees Cook , Carlos O'Donell Subject: Re: [PATCH v16 0/4] perf: Support the deferred unwinding infrastructure Message-ID: <20251024092926.GI4068168@noisy.programming.kicks-ass.net> References: <20251007214008.080852573@kernel.org> <20251023150002.GR4067720@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: <20251023150002.GR4067720@noisy.programming.kicks-ass.net> On Thu, Oct 23, 2025 at 05:00:02PM +0200, Peter Zijlstra wrote: > Trouble is, pretty much every unwind is 510 entries long -- this cannot > be right. I'm sure there's a silly mistake in unwind/user.c but I'm too > tired to find it just now. I'll try again tomorrow. PEBKAC