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 2E0D72C1590; Tue, 24 Jun 2025 15:00:34 +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=1750777237; cv=none; b=INQL5cmCHufmafUMPF/DkQG1saV77AxOLlPb0yR1DM1LQJmlcDdjbYtA1e+UtCMNIMsWi13BrVg4tfymqZfWazvsi/m26xK8HuPsQuNhZ3zAyMRiPGCFmf0NDrXGoreNgC2UvEK8jU8TiCTcxPoOw/EMe3IJvUiBNTZceqJEZfw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750777237; c=relaxed/simple; bh=R3yjv+0wYnNEtTMO8SBzprJW3ICc+hObnUMrM7Ptmno=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Bbx9UEa/1t5gAt84vjw7EuA8EbM2O11I8pNfnCVlwBv9ZKMnSuvYJ0h6ZeDKgzDMPv4Z7Q8HE10u1/Tw35WnpNCBR0pSPg91MeG0JVPZNVWyA8e/zrkG7WVG/cI39ci4ewFSNkZBggxHmRGwhPCR1sLvVBjPjN/0d6vS7NzZ03U= 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=VWLkT13X; 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="VWLkT13X" 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=g1WgOkP4gt8nwCNgZux4aVi+SEORxoTzX5CyUlmMViY=; b=VWLkT13X1HdqxVW29bEotP0ulm 4fkJFH4xdWXFRhNA48yW2YmXv+6qa6ZKaidJqdmQVDlezYzKwmH3IRKOASiTP7D9I5FfxPyJeISVE 50bENnTUFIDG9ygePqiY3d3fduJg6jqQObsWFoN1I1RO97n4LJAlfmgcJnYu1PJg4y54bxL9NScjN WoU8rlAHJwOlClSvK21NAxSLByvUZK4wccCs2+cj8EEV2HSDc/vLknrzOCQgTYve99LMIYq6YwcrF VnCEOlSwmj9E8HTLW46N8dGh4Wnnt44q4OXuZUyS1KI8VcW6kW0WmvQum0sjRY0bsHR7SxWxBIuRi 5sVQuSKQ==; 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 1uU58I-00000005TTn-1wOF; Tue, 24 Jun 2025 15:00:22 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 0C4C7307E51; Tue, 24 Jun 2025 17:00:21 +0200 (CEST) Date: Tue, 24 Jun 2025 17:00:21 +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 , Namhyung Kim , Thomas Gleixner , Andrii Nakryiko , Indu Bhagat , "Jose E. Marchesi" , Beau Belgrave , Jens Remus , Linus Torvalds , Andrew Morton Subject: Re: [PATCH v10 08/14] unwind deferred: Use bitmask to determine which callbacks to call Message-ID: <20250624150021.GX1613200@noisy.programming.kicks-ass.net> References: <20250611005421.144238328@goodmis.org> <20250611010429.105907436@goodmis.org> <20250620081542.GK1613200@noisy.programming.kicks-ass.net> <20250624105538.6336a717@batman.local.home> Precedence: bulk X-Mailing-List: linux-trace-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: <20250624105538.6336a717@batman.local.home> On Tue, Jun 24, 2025 at 10:55:38AM -0400, Steven Rostedt wrote: > > Which is somewhat inconsistent; > > > > __clear_bit()/__set_bit() > > Hmm, are the above non-atomic? Yes, ctags or any other code browser of you choice should get you to their definition, which has a comment explaining the non-atomicy of them.