From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (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 559B83F927B; Fri, 10 Jul 2026 10:30:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=82.195.75.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783679452; cv=none; b=PrVW6uOAz2xW6JWRsxVN/UdkbWV2p55gGN/b2ZLrW0a/DMTS3jZnBGaxfXyStUfiV1B7ZvWYcR16dmLBaK1JDy3DSIoKnHPK8kF/DbpKFMiVyWZfi+0SWgEg+Q1T896mQrtHtudo1TmNX2LBhEBH2VCf+Ik1eqyovCengIb3T1Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783679452; c=relaxed/simple; bh=eTE9te8IlgS4t8DPW2J7FTCETDyWuLrYDq1Dr9d+Wto=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=uGJF30gndC+Le5cbfEY6y6ncYhe1IpdQpVtaRm9R34D54M/k9dd9yg8mElMBPLyMsDVlW4Jul4/k1IbS0JVqPgYS0tJx4E7VI//szeLiCpnUS9N3gQ9/906pKB5fG5PUCu5K2LYQmnegW/bgWfgkqwgETRM95FSpdrWoZl1VE24= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org; spf=pass smtp.mailfrom=debian.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b=vo+e80HG; arc=none smtp.client-ip=82.195.75.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b="vo+e80HG" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=aVkvyZirvmvuldtKXU3SK6JQ1BYkg3/bw93KoV+bSoU=; b=vo+e80HGpExdlttM8SulM6SpqV kfpoUDppD7jaNq++2yhzlebvQuHXyN/lPBR1/JQ9dgQuuwXmwTr9ksyNadGBTIbwqrhv7eyP56suI DWQPCSk7BOXJIVZCcIzhxQPz0Ifu+kaX7cr3WCdFEpnK06QUxvRPp4vlZYJUKc9vJr97Wy3ZYd1q/ tzTBo4ScaYryn80BmhR+nl1BsJ/JuPHh9YnGAvYqfOFQpeagbLfOE0dsEuyO6Y52vRlnTU0ai3EKz SR0Lahmuve90sIiTkWxRRdQtWTZybyYwOMd3kzV/knR5ZWY2ZgTixKSi+v7jr1j0WDP03dD0vjsaZ 6rRLmuJA==; Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1wi8Ux-004Phv-2d; Fri, 10 Jul 2026 10:30:24 +0000 Date: Fri, 10 Jul 2026 03:30:18 -0700 From: Breno Leitao To: Yeoreum Yun Cc: Ard Biesheuvel , Ilias Apalodimas , Borislav Petkov , Andy Lutomirski , Kees Cook , Tony Luck , "Guilherme G. Piccoli" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH v3 5/7] efi/runtime-wrappers: bound the wait for EFI runtime service calls Message-ID: References: <20260616-efi_timeout-v3-0-76dd1d26657b@debian.org> <20260616-efi_timeout-v3-5-76dd1d26657b@debian.org> 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: X-Debian-User: leitao Hello Yeoreum, On Thu, Jul 09, 2026 at 07:56:18AM +0100, Yeoreum Yun wrote: > > One of my concern is for the UpdateCapsule runtime service. > It might have a case where takes more then 2 mins and there's one > RFC to support a runtime capsule update for arm platform [1]. I'm not familiar with UpdateCapsule. Are you suggesting that a 2-minute wait for an EFI call should be acceptable (?!) Wouldn't that trigger stalls and hung-task/wq warnings throughout the kernel?