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 3FE8F225761; Thu, 30 Oct 2025 18:07:53 +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=1761847674; cv=none; b=F3mwyx2+dwJ4Xz07L171wm0y2GJKL2oYy48nI4TVPIFpSSsovgvMZ/qPEXJBfD2no0vCBX9VAdNP+eOkKe/IeARkf6fOKBmBsN2MrLK9tVlcFTQiDvfuW4jZkBC0f0faNP1lZzDcojM01LQcxbO6iqTfNMA5HXCIOWTbFEaa0qA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761847674; c=relaxed/simple; bh=d4YBjSediQsxkiPhR4oIzNv3wOxsjTnymXN3KVEOxoE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pCrcvE5xUubNTCNLarzDCAsPvWT4SI9g3Nl5BnuV7TLk3MJiGLJ9byIbwv1lAfiA2bwVCCC0hfMzgYAwi9e4eX1zvCoy5D1imHopI5xBtN0b4lry1umFTqq/t+CQ3+NDOB2BlJhQFt+AdasYdPvNic90vJciAxq8+CU4jaSGrVk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=B7fU4zUK; 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="B7fU4zUK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 416B0C4CEF8; Thu, 30 Oct 2025 18:07:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761847673; bh=d4YBjSediQsxkiPhR4oIzNv3wOxsjTnymXN3KVEOxoE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B7fU4zUKWaJ3miGs8cpUJJbqcB3At+7D9FJDVUKgaSoQkOwU7n8FTb9XJNl6tqX3x zHm/DG0EYk4029sPp6bwtP3eBtmm3Fa8/1Czzm1xbolvsd8ne/syWt003sV5YA44rs 5jxAsXRMsANGXz9m8fIG8BsOQ5HOfdE9wRHCYLt6ULFJGQfdPgEDu7bf5uMJnsrns5 6tM1s1wsFLol8C3x1/zvFUWSrTHuiBTfvaJgf2/R4fYM1FzRdfNdnqPJODIcd+W1gZ rxozXQ5UUH2EQtZWiDtrKOQaSrbJFS4fFY93eZNJVHHF7vDKOtn3JBxQ7wPAH0pr2L Pt7x5TNWy4lTg== Date: Thu, 30 Oct 2025 18:07:49 +0000 From: Mark Brown To: Andi Kleen Cc: Peter Zijlstra , Fangrui Song , linux-toolchains@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Concerns about SFrame viability for userspace stack walking Message-ID: References: <3xd4fqvwflefvsjjoagytoi3y3sf7lxqjremhe2zo5tounihe4@3ftafgryadsr> <20251030102626.GR3245006@noisy.programming.kicks-ass.net> <87zf982s52.fsf@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="GoW7l/VHTumaJv7Z" Content-Disposition: inline In-Reply-To: <87zf982s52.fsf@linux.intel.com> X-Cookie: Be different: conform. --GoW7l/VHTumaJv7Z Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Oct 30, 2025 at 10:53:13AM -0700, Andi Kleen wrote: > IMNSHO the whole sframe effort is misguided because all the major ISAs do= have > shadow stack hardware support now which is generally a better option.=20 > It would be better to invest effort in deploying that widely. It's going to take a *considerable* time for the hardware support to become standard. --GoW7l/VHTumaJv7Z Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmkDqXQACgkQJNaLcl1U h9AA6wf/fPlJ3ZZiRfquQVNzY+ew+cYxeWDCikXzsRlhgaI9QtgyOYuqap9kP6Zm Q4GtCiSdQlhesTLSCDYlzA47oPaU/kIsqMM2oWFLQpG86P42wcU50nK1pM2xDd03 CTIKCwXaPg9g85BBDJImlUNR4AObyB+aWrVm5zY+ryjFjxgwTWJq+c4Z4BBqvgwq rBnJIqGYd4gBOSqEq+YoCER52rFc4/o1w5M3huTTXOGDewIOPhEhIIvcUxfk59T5 X+vYoD6cShQP3g4Av2eXzkvp6gaEtql6rlQfwd1sXRRBHpWzVxTlWJlOL8udq2iV h2fPSgo3sJ/5rwWlavKPjnCpFCN3xg== =8uFa -----END PGP SIGNATURE----- --GoW7l/VHTumaJv7Z--