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 D5C74C369A4 for ; Tue, 8 Apr 2025 17:48:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 45F3E6B0012; Tue, 8 Apr 2025 13:48:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3E88B6B009A; Tue, 8 Apr 2025 13:48:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2B0856B00A3; Tue, 8 Apr 2025 13:48:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 0A7216B0012 for ; Tue, 8 Apr 2025 13:48:59 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id E27CC5B15E for ; Tue, 8 Apr 2025 17:48:58 +0000 (UTC) X-FDA: 83311612356.15.9D72A50 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf11.hostedemail.com (Postfix) with ESMTP id 2872B40005 for ; Tue, 8 Apr 2025 17:48:56 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=r011JZJ1; spf=pass (imf11.hostedemail.com: domain of djwong@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=djwong@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1744134537; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=9lxsONkGHZ23Ilr4kuawSRLqwKxjV1EtBi8gH6tbrZU=; b=dK49aS+lCEzNJIY0A5L/m1ZVP7j57MYkehuxh1NxI/B9pMwaRrVyuyQQgE0CtuxYpANEY6 bM0harodoMhG/f/olIjykaMNUCej6jUrtRHqu5JSdjSH3yIwm9YzWzs4iR3ZaTUQ+mhnNT BSgByK4u5oIGsthmZ72VQ7MOrsnzObI= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=r011JZJ1; spf=pass (imf11.hostedemail.com: domain of djwong@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=djwong@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1744134537; a=rsa-sha256; cv=none; b=qHlQv2bnupa+3/n95/k7NFjHvmXB6YGokcFZk151OKZhGTreqkgNxuHHuY0Lr6k2E646Bf 2NFGEeoe6WgCXTiWKDAULibJhrYTbiJji3L9N+PIZN/MANgakM9Mec4IvGYfBkoouwvFho 8MIHIYO/H2dyv/9viLoSBGeNgJ1EqQc= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 044B344B5A; Tue, 8 Apr 2025 17:48:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 90F30C4CEE5; Tue, 8 Apr 2025 17:48:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744134535; bh=TdcykO/mghNf7CApPAPiGbc4Ap+76aFjaQ1G0ZF/1Fw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=r011JZJ1Bwu5Q3CTglhODEsz9xvCkNNFznG4hJq0zj2FGM9UvvS6i18OLvLwe9EIW wbciFnly4IhqfzgqcxVGhGbTXEPXWtX2tSZsbyJQCDrZj0lsAvc1ctVYf4zeFktpIZ 3vZm/cpmUHcjicVH0gPjtT+TAKnAPx/IS2GpFhx4eiyBRRwaYtosGcFp+8vzy3Bw+N XTN8eS0glsG4Jmqi5/T5CorQajBJXZ0O9B3f/BZ4GGrHHd3u+4exvp31qgZ7FBuoU8 kzzNFYOm4wswHtUy1uL8Clg7ln3OgJeic63egQay8Be9BmABHamxhE98z7PlVQxf2P JtSj3XxUtX+og== Date: Tue, 8 Apr 2025 10:48:55 -0700 From: "Darrick J. Wong" To: Luis Chamberlain Cc: David Bueso , Jan Kara , Kefeng Wang , Tso Ted , Ritesh Harjani , Johannes Weiner , Oliver Sang , Matthew Wilcox , David Hildenbrand , Alistair Popple , linux-mm@kvack.org, Christian Brauner , Hannes Reinecke , oe-lkp@lists.linux.dev, lkp@intel.com, John Garry , linux-block@vger.kernel.org, ltp@lists.linux.it, Pankaj Raghav , Daniel Gomez , Dave Chinner , gost.dev@samsung.com, linux-fsdevel Subject: Re: [linux-next:master] [block/bdev] 3c20917120: BUG:sleeping_function_called_from_invalid_context_at_mm/util.c Message-ID: <20250408174855.GI6307@frogsfrogsfrogs> References: <20250331074541.gK4N_A2Q@linutronix.de> <20250408164307.GK6266@frogsfrogsfrogs> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Queue-Id: 2872B40005 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: yogd1tbkcsemsz35hsyi8wsh9z1is5go X-HE-Tag: 1744134536-938302 X-HE-Meta: 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 jxmGQE/g TIPrzcKQe2/bS7AyuhvMf+BKFwqQ63L191y21tAEJ/KgOsEhKI2VEFMMPTz64hlX7bE9qgbtc/s3XXt6UEIQmk+6GT1U6FvBJnYgZ8wdBz1R75YjhpmTgQiIM1eXUJhiEEO97Vjsuo/gUlRVoQFqW1QFuM8IOnRH9tTk+4LpBMQQurB0L0cdzRyAWlykKP/lJ+FGqd1cQOftpzO60rbvo22pAVE3ABrNfqIHOqEJPZIYD6Zk1ozIpeI/c6otCEnBXDRHiEqTg5PzEP5VwZGci88SXQJCKecwhlfdYLU8YCJ0o5skUzsnqVtZuI4ehSaGPEF9nomC10lSWMLZaCK5O9yNqveIglS81fklJDX3++cr7aqHHWb2JwR56WdEkDYltFoM3qzflMlmP8NX+aSNd4nAveEk9O6TxzGp3 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: On Tue, Apr 08, 2025 at 10:24:40AM -0700, Luis Chamberlain wrote: > On Tue, Apr 8, 2025 at 10:06 AM Luis Chamberlain wrote: > > Fun > > puzzle for the community is figuring out *why* oh why did a large folio > > end up being used on buffer-heads for your use case *without* an LBS > > device (logical block size) being present, as I assume you didn't have > > one, ie say a nvme or virtio block device with logical block size > > > PAGE_SIZE. The area in question would trigger on folio migration *only* > > if you are migrating large buffer-head folios. We only create those > > To be clear, large folios for buffer-heads. > > if > > you have an LBS device and are leveraging the block device cache or a > > filesystem with buffer-heads with LBS (they don't exist yet other than > > the block device cache). My guess is that udev or something tries to read the disk label in response to some uevent (mkfs, mount, unmount, etc), which creates a large folio because min_order > 0, and attaches a buffer head. There's a separate crash report that I'll cc you on. --D