From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF8DEC61D85 for ; Tue, 21 Nov 2023 18:21:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231377AbjKUSVu (ORCPT ); Tue, 21 Nov 2023 13:21:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231178AbjKUSVs (ORCPT ); Tue, 21 Nov 2023 13:21:48 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7CCC318C for ; Tue, 21 Nov 2023 10:21:44 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73D59C433C8; Tue, 21 Nov 2023 18:21:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700590904; bh=uuSp4UF93Yu6TM00YqGBR4qOIe80QpXkm4wokphvd1E=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=sEBUPdjrYlsUWvimRMfCFE3WHRzscOhraRcrNbVFUR6mTLCbtLCntqo06sA1GuEvA l2pYNJuiPrLYgivEa+Ss49EjguoP0BAmwU/viDR4Akckk5W5xeFw8fNzESBGo7F0ug 9K1uLJHb0SjNQZEufhUbFCf/QwocGl8n/QyXzRkzUGSokVKe64I7yc0qr/bvyErfbx MGA1L/FIE/4b0y6/6QJTGwvUKBeIzkCq/7rLHBmUAKiiu+0KJaJPgIlFuHdxc5inCg OQ0BF8vS+1kh/IgjNb0lUOYp+us+t6TUsrT8eA0+nARM/zuusZof3q92pa+pK1MRk+ 6JgSB/n4AC0LA== Date: Tue, 21 Nov 2023 18:21:39 +0000 From: Mark Brown To: Chengming Zhou Cc: vbabka@suse.cz, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Chengming Zhou Subject: Re: [PATCH v5 6/9] slub: Delay freezing of partial slabs Message-ID: References: <20231102032330.1036151-1-chengming.zhou@linux.dev> <20231102032330.1036151-7-chengming.zhou@linux.dev> <4f3bc1bd-ea87-465d-b58a-0ed57b15187b@sirena.org.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="ExGtKKkUwz4hb5lM" Content-Disposition: inline In-Reply-To: X-Cookie: Slow day. Practice crawling. Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --ExGtKKkUwz4hb5lM Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Nov 21, 2023 at 11:47:26PM +0800, Chengming Zhou wrote: > Ah yes, there is no NMI on ARM, so CPU 3 maybe running somewhere with > interrupts disabled. I searched the full log, but still haven't a clue. > And there is no any WARNING or BUG related to SLUB in the log. Yeah, nor anything else particularly. I tried turning on some debug options: CONFIG_SOFTLOCKUP_DETECTOR=y CONFIG_DETECT_HUNG_TASK=y CONFIG_WQ_WATCHDOG=y CONFIG_DEBUG_PREEMPT=y CONFIG_DEBUG_LOCKING=y CONFIG_DEBUG_ATOMIC_SLEEP=y https://validation.linaro.org/scheduler/job/4017828 which has some additional warnings related to clock changes but AFAICT those come from today's -next rather than the debug stuff: https://validation.linaro.org/scheduler/job/4017823 so that's not super helpful. > I wonder how to reproduce it locally with a Qemu VM since I don't have > the ARM machine. There's sample qemu jobs available from for example KernelCI: https://storage.kernelci.org/next/master/next-20231120/arm/multi_v7_defconfig/gcc-10/lab-baylibre/baseline-qemu_arm-virt-gicv3.html (includes the command line, though it's not using Debian testing like my test was). Note that I'm testing a bunch of platforms with the same kernel/rootfs combination and it was only the Raspberry Pi 3 which blew up. It is a bit tight for memory which might have some influence? I'm really suspecting this may have made some underlying platform bug more obvious :/ --ExGtKKkUwz4hb5lM Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmVc9TIACgkQJNaLcl1U h9Bhawf+OS9uDdyEyyKar5CBTjXlEF4S1z7TlKgi+GADx/qa8waOCJwrzBE07ro2 OticnnKATaKpYyX2QL1oLw4fyjklvi7xKyXl6/5bnROvXnHLRiTqS3Hvi9+Pp6MO uutb44QpQfYqJUG40C0RyENJO+TkxgIR0OsEqS9CtAKLqx8dQqfiRZzy4pF33nqK sxBTIld16BVKOSl8SJLTP/jHOVgGiH0Ug1uE+j+KDtpFO40xQNaJFcq5NLxZGSQF cPQhJagc14fUB+juA0zwoBvFvwzHg6Q+IsKFuCuK0vW9i8UTow+vfcCWCgzsVg3T T0TSQ2qrVibbUhsK7RQMMYYRi4txLg== =K1+p -----END PGP SIGNATURE----- --ExGtKKkUwz4hb5lM--