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 ED5D21A83FB; Tue, 28 Jan 2025 12:14:11 +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=1738066452; cv=none; b=O91Jz66G2wKcqhXOlaqHFz90egEN4ES05fg8zG+1/pdxI9mec4SDXVHM4/W0C3yj9PIgHZnBzaKRxtkOLYua5QAqZNPMr9rtXx8vAVQGo9LxunFa6/y00CfBAiC1t5CMYeQE2t1C+J8HnKo4vevE8AkhyXn7zjY9yQWix0vbw4U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738066452; c=relaxed/simple; bh=VPmQMeTKshQi8BLPiBnU+quZcCNk2gBWVueKbAAt7hw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=P8zm7HiUpAXDK8bJ6DVWqjWtx2yB2q4m5aO/nFceE6LIzSht1KDqFiAYn1B23JKiXgp/2wuwPW/0/RrALScTZbw7QOD6MAioqt6UVWSnqlZX493IMcQNPB9p7WAxuv5lmNns2acoL2UeGym9LYSRB5rAoSt/52lYDcYjuESs2Pg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aexm+d10; 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="aexm+d10" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DEE60C4CED3; Tue, 28 Jan 2025 12:14:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738066451; bh=VPmQMeTKshQi8BLPiBnU+quZcCNk2gBWVueKbAAt7hw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=aexm+d10gkwLafsjApxGoJimfTgljfCLIWi4xLssNjuUuWMcp+PBzVxu8tHd2EKyx rGqKog1ElS3/OEQDRcD82z/oZezg9Kj6iwBRxVr1t0ual+2v+Dsz+U0w+PGaEZqoJU D/wuOF955EfwSZU5N6M2UxeWFV2adrYgc5ULhfXsLJEsUQv78GuJH3GayfG9YBQy0W JpUZ3da5vaPYEeUbgCxswlXP7AM/ISxcp3Wq8MhtIjogU3ayc+CRIPe+07W3m5cur+ zJ75NRTfRh38WdcLevujaJWPQQVkYgn5FrqZKeh0Zbs1iaJ4bSM67/i5IswRyfjmv8 GWaTtd2gVwZOg== Date: Tue, 28 Jan 2025 12:14:07 +0000 From: Mark Brown To: Sasha Levin Cc: Linus Torvalds , kernelci@lists.linux.dev, Al Viro , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, lkft@linaro.org Subject: Re: [git pull] d_revalidate pile Message-ID: <3770d3ed-e261-4093-9a41-90f0dfdd393b@sirena.org.uk> References: <20250127044721.GD1977892@ZenIV> <804bea31-973e-40b6-974a-0d7c6e16ac29@sirena.org.uk> 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="aZFSBvZRh7wr7T/o" Content-Disposition: inline In-Reply-To: X-Cookie: I never did it that way before. --aZFSBvZRh7wr7T/o Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jan 27, 2025 at 05:32:18PM -0500, Sasha Levin wrote: > [ Adding in the LKFT folks ] Oops, sorry - didn't realise they weren't already on the report since it was on LKFT or I'd have done the same. > On Mon, Jan 27, 2025 at 08:38:50PM +0000, Mark Brown wrote: > > have the ability to save the vmlinux. Poking around the LKFT output it > > does look like they're doing that for the LKFT builds: > My understanding was that becuase CONFIG_DEBUG_INFO_NONE=3Dy is set, we > actually don't have enough info to resolve line numbers. The arm64 and arm defconfigs which are the main ones I'd end up looking at both set CONFIG_DEBUG_INFO (_REDUCED in the case of arm64), the trace you posted was from arm64 so unless it was some config that overrode things there ought to be info. x86_64 which I guess you might use more indeed doesn't have it. > I've tried running decode_stacktrace.sh on the vmlinux image linked > above, and indeed we can't get line numbers. That was a random build I pulled out which turns out to be a tinyconfig rather than the specific build that was used - if we look at an arm64 defconfig (your trace looked to be from arm64): https://qa-reports.linaro.org/lkft/sashal-linus-next/build/v6.13-rc7-85= 84-gd4639f3659ae/testrun/27028517/suite/build/test/clang-nightly-defconfig-= 40bc7ee5/details/ https://storage.tuxsuite.com/public/linaro/lkft/builds/2sDW1oYDQrsEOOs4= L6yoysbu9aS/ I'm able to decode (just feeding a random log message in, no idea what specific build generated the log message so the line number is almost certainly wrong): $ echo [ 62.184178] d_same_name+0x4c/0xd0 | ./scripts/decode_stacktra= ce.sh /tmp/vmlinux [ 62.184178] d_same_name (fs/dcache.c:2127) =20 --aZFSBvZRh7wr7T/o Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmeYyg4ACgkQJNaLcl1U h9ABLwgAhnkclVNICA/aHT+23arfK9S3L44hGHHrDVOokd5JPC5CibjVlNYz2UM+ U+ZLTV1r6XJlKPI0tgmNhjyrmBSNqwz3BcjPlldwGBJRiDkD04sFjfaVYh+5Rlun iAQ0QYQvft1v0gquWilwLZ1TrGlI6x81hk2c7Q/b84HIG9zpz7JA+/7Xe4gr99Wi v2/eFlc2Y/NpacFMJnLPTt+KtugL3TllfyHU/Oh5USO4j7oZyYU9i9PGG89O/9oh hKkFzlD8/aYhngT8QYGN75uAFZm1fgmkdCv8cLpmJft3OM9zkw8CyJf2zO5J+T9w KmhavpIYql2a088i5rZnrtnYwnqgaA== =2o/n -----END PGP SIGNATURE----- --aZFSBvZRh7wr7T/o--