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 2DB4F224227; Thu, 19 Jun 2025 10:40:04 +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=1750329606; cv=none; b=Y1o0p93ECNMIs9oYQheQuFCW3exnoBiU7VpsoCsQpjothFLwA71ng/POjDOR1j7hCO+uZVyBKX91YSSRcKyEmWIjwuBaq75AITldmRNfqT/TomC0Zv6RMMxddW6qmf7dNzZX1+Is8sVbzMz6zjbfjxmIXMCoRGjUfwGlIBSZ8Ms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750329606; c=relaxed/simple; bh=nntOW/P5iGDCWsOWzk1HoLNiFqAj5krOk873NBh3xys=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=k7jdOMgAN7D80ebWtrw0NsLZ4gNXAOzsYx2kKenzJey/xywRKwMf1pyJBkB2FrupsPY1gAsU9q8TiC4e/HR+mQxSHHF3OK0+4AMtp4+lNT79IHpL0UMdiYIbGzw4RoVUahrBJV2BiSK/KID7pB1o3FF1GYfPxuEBwKfohujlXc8= 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=YZctAzzL; 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="YZctAzzL" 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=nntOW/P5iGDCWsOWzk1HoLNiFqAj5krOk873NBh3xys=; b=YZctAzzLpoDxOnzb14Pro3peMI XvjAGHaTK9JTW/16WWu9v/Hltm8e0T4M4hvapVZde6mVrufyjuFf5c9cDA2V70otQ3F3vxvnseJkq BpxHT8RxjinEyZgrmP2001WwYLJRgoPaOLCmhDn7TNZacWJv96F40VxslyBxjKm6+2zAe0SFHRx6q xuYRDcYSgPNgwmpfA4cIgHfX1SEjXqIEylqEn7GWGQE5Bmm4/ImH/LvFZpiNOz/Ij1nLwoccabEd3 EcHNurT+CIMzPCwWHVOjM+tOArDy1hbn6qvH6FbeIb2GaPvudbJMj7UbIVGgtuO+OKaWJUhcUdhU3 4D0kuJXw==; 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 1uSCgS-00000004PyM-3ueU; Thu, 19 Jun 2025 10:39:53 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 3C1CD30890E; Thu, 19 Jun 2025 12:39:51 +0200 (CEST) Date: Thu, 19 Jun 2025 12:39:51 +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 07/14] unwind_user/deferred: Make unwind deferral requests NMI-safe Message-ID: <20250619103951.GJ1613200@noisy.programming.kicks-ass.net> References: <20250611005421.144238328@goodmis.org> <20250611010428.938845449@goodmis.org> <20250619085717.GB1613376@noisy.programming.kicks-ass.net> <20250619093226.GH1613200@noisy.programming.kicks-ass.net> <80DBA3D8-5B52-43DB-8234-EAC51D0FC0E1@goodmis.org> <20250619094505.GC1613376@noisy.programming.kicks-ass.net> <66A7F6C1-3693-4F76-A513-7CBBE3154B06@goodmis.org> 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: <66A7F6C1-3693-4F76-A513-7CBBE3154B06@goodmis.org> On Thu, Jun 19, 2025 at 06:19:28AM -0400, Steven Rostedt wrote: > We currently care about x86-64, arm64, ppc 64 and s390. I'm assuming > they all have a proper 64 bit cmpxchg. They do. The only 64bit architecture that does not is HPPA IIRC.