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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 115B2C61D85 for ; Tue, 21 Nov 2023 18:21:51 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6F02D6B0495; Tue, 21 Nov 2023 13:21:51 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 69E2D6B04B4; Tue, 21 Nov 2023 13:21:51 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 58CD16B04B9; Tue, 21 Nov 2023 13:21:51 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 458206B0495 for ; Tue, 21 Nov 2023 13:21:51 -0500 (EST) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 146E514028B for ; Tue, 21 Nov 2023 18:21:51 +0000 (UTC) X-FDA: 81482780022.27.01D923A Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by imf27.hostedemail.com (Postfix) with ESMTP id BF01140005 for ; Tue, 21 Nov 2023 18:21:48 +0000 (UTC) Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=sEBUPdjr; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf27.hostedemail.com: domain of broonie@kernel.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=broonie@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1700590909; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=HkJLzWWqmykZNnivc7oYA4m0KDdtQ37FMDzjV4orZtg=; b=kTs4ZYJmg3f6m6iyY8M+nzZ0Wpp0rBumU8rXbtECT/0t1Jk5vdBwHhzKtQY0ovL8KBcGm1 +/PnowebLDkFvc2B98cB/usW4V78Z6/GNermV8Z482xncOOFLQoO9l0yvIZVzs1s50xsK7 bRvoFlwYKAl9aVRjdK1Xi84J7r/C4RY= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=sEBUPdjr; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf27.hostedemail.com: domain of broonie@kernel.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=broonie@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1700590909; a=rsa-sha256; cv=none; b=j5BcLUPb8sfAbJC/EofgSwEeeQ09unnRpK0Wb+eES3CaNsIkOwMjqXMUsXOvM93OaQO8nW dHTQ51ermk2G545pnIAEcsotM6zWBZfbzETb+Kr7w8/r5xqPwNUueTmdcPmO7rO6ZQj+YU kimAzdKfo/NWNLuCq5gqsGU59HRrbnU= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id D3086CE1C1F; Tue, 21 Nov 2023 18:21:44 +0000 (UTC) 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. X-Rspam-User: X-Stat-Signature: w81m4nb4ajmopkqprkktosdh9ar1bjum X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: BF01140005 X-HE-Tag: 1700590908-250026 X-HE-Meta: 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 EOhjz0I2 zgBIRUBNE4QjLlQ8Sj6jnsvl5oE3UauIpImDLZfwgZBqjnlOkQPapj+361hKJrdFA+2oa4mAS92K8PGLZI7E83y08xDY8wfTeupWs1o01UfiJaWDJcZB0qHilG3JVk/fb7ot0oBhg5o35E408WM2bH1WzG5/XFqVPsh0thqAboxFEC3LqFKwQZL+Lf4ATDPw+n/phAtW1/5fOSM4BGTutW33p6shYTpnj0q32O69e8boD3+sO/EwKqcWljTp033jIZpHruBMHqYHGfuM/OXxr96QooYWFN0eKkEfMaG7cTi9ynhPTUhTOgeqToZbeM7XI1A+T+hkB8A9I2OwE0ultmffxXA6r6xBzGsNIN8tDDOr04grBSHi/aOZ+1lCg8J1+PAsj9cxaX9Nu+DqedQekpx2AHqUE9V/k3nEmJWs1B9q5L5d1kX1+h8BAPY6Ys0PBZBejDcqX3wBzaNIgwQ3hOCM2gQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --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--