From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outpost1.zedat.fu-berlin.de (outpost1.zedat.fu-berlin.de [130.133.4.66]) (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 2D7101804A; Mon, 1 Sep 2025 07:06:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=130.133.4.66 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756710369; cv=none; b=YgjIn7FIxEDI7nno3s11dapidf05pa8RZIfc45ybdRIlICPIJgnVNxzB7YJXQjEHgRlEeTPm4DotlU2g5Qt1R2uqEE8Irk/01iD8k1cBR2w2OfWXkjJbmsIWjWet3YS9kZo+qsxCXCGwSuynsaATOAG2S07kaxhXRZWJxW6ywhM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756710369; c=relaxed/simple; bh=D/hYsH0w+i5tF9S5XEvhBqUABdE/dU1F3VhNIXxauZk=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=UymfgZN/bc0o+kwa8628JmyZWmFDKwcj2iBFcd//CpN5NtXvt25IJprXgI6oE/WQyRFmKIzdW9MkDYtULaV4lKGqlAqDNNjdqAYvnE4R24tmALmvik2pa+PM5U+DGLo8asgwGXp1WFpJbL8PaAGN0UocNuXowpDVGkDJbqePuYQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=physik.fu-berlin.de; spf=pass smtp.mailfrom=zedat.fu-berlin.de; dkim=pass (2048-bit key) header.d=fu-berlin.de header.i=@fu-berlin.de header.b=A35wPPao; arc=none smtp.client-ip=130.133.4.66 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=physik.fu-berlin.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zedat.fu-berlin.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fu-berlin.de header.i=@fu-berlin.de header.b="A35wPPao" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=fu-berlin.de; s=fub01; h=MIME-Version:Content-Transfer-Encoding: Content-Type:References:In-Reply-To:Date:Cc:To:From:Subject:Message-ID:From: Reply-To:Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:In-Reply-To: References; bh=MPgh1/ZPw2CdKPWJl0bD2cP1L02gYkFQx8nUqM9w8Ng=; t=1756710362; x=1757315162; b=A35wPPaoWx+0fIIYFcEhKqQR95Uxc0drFD6W2QksmSaOjsov0eXtCxykgGteF UDJUToheLc2M2qB2rQdu8yq5saa/MHzIVs/9tH3UVJzKD6q79w0Akok2WhufMJT5U7FpXWTTLLf4g VFyQYb/94OCC2sG2WJ7w6FAcDnp64bJE9cUtjd40DTWJp4ICxVYRduugfW2sORgbe+aAlp1yzBndE Tq5o/kduH/CNTqGLwd8Of1e1/0hhh0fjT0j71v38sKHiqeVUXl7qwrTyrG2ufvpnabXFiZWjI8liG U0dCPWRRJ7ltFNWIr/bGISfaxzwHukW/2gMrFJg/ht6PFVwWng==; Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost.zedat.fu-berlin.de (Exim 4.98) with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (envelope-from ) id 1usyc3-00000000joo-2Idj; Mon, 01 Sep 2025 09:05:59 +0200 Received: from p5b13aa34.dip0.t-ipconnect.de ([91.19.170.52] helo=[192.168.178.61]) by inpost2.zedat.fu-berlin.de (Exim 4.98) with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (envelope-from ) id 1usyc3-00000002ixN-1LmA; Mon, 01 Sep 2025 09:05:59 +0200 Message-ID: <4c92d08cff24c04023bff8555ecf3bbd2eb0e944.camel@physik.fu-berlin.de> Subject: Re: [PATCH v2 1/1] sparc: fix accurate exception reporting in copy_{from,to}_user for M7 From: John Paul Adrian Glaubitz To: Rainer Orth Cc: Michael Karcher , linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, Andreas Larsson , Anthony Yznaga Date: Mon, 01 Sep 2025 09:05:58 +0200 In-Reply-To: References: <20250828130456.2335-1-kernel@mkarcher.dialup.fu-berlin.de> <240f0f51687dcb146656a47932ec075b0821b605.camel@physik.fu-berlin.de> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Original-Sender: glaubitz@physik.fu-berlin.de X-ZEDAT-Hint: PO Hi Rainer, On Mon, 2025-09-01 at 09:00 +0200, Rainer Orth wrote: > > in the past, you reported stability issues with the Linux kernel when r= unning > > inside an LDOM on SPARC M7/M8. Could you verify whether the patch above= fixes > > these problems or whether at least they don't introduce regressions? >=20 > thanks for the heads-up. Indeed the hangs persist even when the system > is idle. However, I've never built a Linux kernel before and have way > too much on the plate to try now. Besides, I don't have a reproducer > for the issue, so even with a patch I'd have to wait for an extended > period of time to see if the issue is gone, so I'll just wait until the > patch lands in the Debian/sparc64 repo and see if it helps. Would it work if I built a kernel for you plus installation instructions and a quick explanation how to test it? FWIW, we consider the patch already acceptable when it doesn't introduce any regressions. I did some testing on a SPARC S7 yesterday, but the problem is that the support for SPARC S7 in the Linux kernel is incomplete at the moment and I had to add it quickly myself which did actually work but I really would like to verify it on M7 or M8 again to at least not cause regressions. Thanks, Adrian --=20 .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913