From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 AE2A722D4C0; Tue, 8 Apr 2025 17:51:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744134688; cv=none; b=L1AZKUt3kF7ZK7K/W/Ilk+IUFkYM4iMBfvSC5bO3O+dW80O1R0DAdRie7k+7nojo3g43/X2WqJqXpTeDSciW2qljPqtwRHKp3bhsYm/FNlxm7BnTfRMXGT7vGN+roVowMDcwh18RcdNxfC17i9d3QAvQSu8PW0Mpnk8tlZsLSGo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744134688; c=relaxed/simple; bh=nyTUNsuPjPGzyNEqBbLpwSD1kFm8MNqPPii+JsWSl4s=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BXxJBZDiL+dirrNRVP9jcHCI9lJ9gbcfpg8sm3GEDkfXvLwsq+uN6PVvB0qn5K9yAxKgvZ9KRDkBIdynUcOFL4hf5/xrOXQ4g3oDzjSaDBgtg22K9ecWAFIq/zO2VhSjYYGokOaarWj0o9na4+ZkqUjFzxFtsB7Eenp6UybUx0k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=oRpD+7Vp; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="oRpD+7Vp" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=LRoGsm36GWYvDS1XW5mGL/7sKrvWfbhdm+vbaWZ07xI=; b=oRpD+7Vp0e6qyj9DRDn2GCOlm3 QtllRxj5NJ/kOR/p0aXCC/crlROlM3tpCnE2R9jbNekSugaTVJeIPnSACelAiyHiY6eWW7OiJ/ur/ QMAM8mcWeNn88uJmLjz/63ZWtc1Gztmxkg2io6kDrtossNunvtlsw6kHzOqudKBBVzSqO5+iKhMK8 euIj2dPnhebY2hqhmBXiIJ3VGAAKoDZCOPcJAulPYz0V1dtSqNxa/XYk0QPIopMuVprax9sVnU/6Z 7G4L9yb9UvvMamiEpwksfST5cchHFB5oUJ5OaZ/o16Y241oWm/8SVoiAFs/nqeDzZHMJIJ1cY+9hI U2ezk9IQ==; Received: from willy by casper.infradead.org with local (Exim 4.98.1 #2 (Red Hat Linux)) id 1u2D6Q-00000000JDI-1K6g; Tue, 08 Apr 2025 17:51:14 +0000 Date: Tue, 8 Apr 2025 18:51:14 +0100 From: Matthew Wilcox To: "Darrick J. Wong" Cc: Luis Chamberlain , David Bueso , Jan Kara , Kefeng Wang , Tso Ted , Ritesh Harjani , Johannes Weiner , Oliver Sang , 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: References: <20250331074541.gK4N_A2Q@linutronix.de> <20250408164307.GK6266@frogsfrogsfrogs> <20250408174855.GI6307@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20250408174855.GI6307@frogsfrogsfrogs> On Tue, Apr 08, 2025 at 10:48:55AM -0700, Darrick J. Wong wrote: > 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. But you said: > the machine is arm64 with 64k basepages and 4k fsblock size: so that shouldn't be using large folios because you should have set the order to 0. Right? Or did you mis-speak and use a 4K PAGE_SIZE kernel with a 64k fsblocksize? 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 picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9B4D8C369A4 for ; Tue, 8 Apr 2025 17:51:48 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 01FF53CB3B3 for ; Tue, 8 Apr 2025 19:51:47 +0200 (CEST) Received: from in-2.smtp.seeweb.it (in-2.smtp.seeweb.it [217.194.8.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 14F043CABDA for ; Tue, 8 Apr 2025 19:51:29 +0200 (CEST) Authentication-Results: in-2.smtp.seeweb.it; spf=none (no SPF record) smtp.mailfrom=infradead.org (client-ip=2001:8b0:10b:1236::1; helo=casper.infradead.org; envelope-from=willy@infradead.org; receiver=lists.linux.it) Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-2.smtp.seeweb.it (Postfix) with ESMTPS id 2FE8B6011BD for ; Tue, 8 Apr 2025 19:51:28 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=LRoGsm36GWYvDS1XW5mGL/7sKrvWfbhdm+vbaWZ07xI=; b=oRpD+7Vp0e6qyj9DRDn2GCOlm3 QtllRxj5NJ/kOR/p0aXCC/crlROlM3tpCnE2R9jbNekSugaTVJeIPnSACelAiyHiY6eWW7OiJ/ur/ QMAM8mcWeNn88uJmLjz/63ZWtc1Gztmxkg2io6kDrtossNunvtlsw6kHzOqudKBBVzSqO5+iKhMK8 euIj2dPnhebY2hqhmBXiIJ3VGAAKoDZCOPcJAulPYz0V1dtSqNxa/XYk0QPIopMuVprax9sVnU/6Z 7G4L9yb9UvvMamiEpwksfST5cchHFB5oUJ5OaZ/o16Y241oWm/8SVoiAFs/nqeDzZHMJIJ1cY+9hI U2ezk9IQ==; Received: from willy by casper.infradead.org with local (Exim 4.98.1 #2 (Red Hat Linux)) id 1u2D6Q-00000000JDI-1K6g; Tue, 08 Apr 2025 17:51:14 +0000 Date: Tue, 8 Apr 2025 18:51:14 +0100 From: Matthew Wilcox To: "Darrick J. Wong" Message-ID: References: <20250331074541.gK4N_A2Q@linutronix.de> <20250408164307.GK6266@frogsfrogsfrogs> <20250408174855.GI6307@frogsfrogsfrogs> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20250408174855.GI6307@frogsfrogsfrogs> X-Virus-Scanned: clamav-milter 1.0.3 at in-2.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [linux-next:master] [block/bdev] 3c20917120: BUG:sleeping_function_called_from_invalid_context_at_mm/util.c X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ritesh Harjani , Kefeng Wang , Jan Kara , David Hildenbrand , Dave Chinner , linux-mm@kvack.org, David Bueso , lkp@intel.com, gost.dev@samsung.com, Alistair Popple , Pankaj Raghav , John Garry , Daniel Gomez , linux-fsdevel , Hannes Reinecke , ltp@lists.linux.it, linux-block@vger.kernel.org, Christian Brauner , Tso Ted , Luis Chamberlain , Oliver Sang , Johannes Weiner , oe-lkp@lists.linux.dev Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" T24gVHVlLCBBcHIgMDgsIDIwMjUgYXQgMTA6NDg6NTVBTSAtMDcwMCwgRGFycmljayBKLiBXb25n IHdyb3RlOgo+IE9uIFR1ZSwgQXByIDA4LCAyMDI1IGF0IDEwOjI0OjQwQU0gLTA3MDAsIEx1aXMg Q2hhbWJlcmxhaW4gd3JvdGU6Cj4gPiBPbiBUdWUsIEFwciA4LCAyMDI1IGF0IDEwOjA24oCvQU0g THVpcyBDaGFtYmVybGFpbiA8bWNncm9mQGtlcm5lbC5vcmc+IHdyb3RlOgo+ID4gPiBGdW4KPiA+ ID4gcHV6emxlIGZvciB0aGUgY29tbXVuaXR5IGlzIGZpZ3VyaW5nIG91dCAqd2h5KiBvaCB3aHkg ZGlkIGEgbGFyZ2UgZm9saW8KPiA+ID4gZW5kIHVwIGJlaW5nIHVzZWQgb24gYnVmZmVyLWhlYWRz IGZvciB5b3VyIHVzZSBjYXNlICp3aXRob3V0KiBhbiBMQlMKPiA+ID4gZGV2aWNlIChsb2dpY2Fs IGJsb2NrIHNpemUpIGJlaW5nIHByZXNlbnQsIGFzIEkgYXNzdW1lIHlvdSBkaWRuJ3QgaGF2ZQo+ ID4gPiBvbmUsIGllIHNheSBhIG52bWUgb3IgdmlydGlvIGJsb2NrIGRldmljZSB3aXRoIGxvZ2lj YWwgYmxvY2sgc2l6ZSAgPgo+ID4gPiBQQUdFX1NJWkUuIFRoZSBhcmVhIGluIHF1ZXN0aW9uIHdv dWxkIHRyaWdnZXIgb24gZm9saW8gbWlncmF0aW9uICpvbmx5Kgo+ID4gPiBpZiB5b3UgYXJlIG1p Z3JhdGluZyBsYXJnZSBidWZmZXItaGVhZCBmb2xpb3MuIFdlIG9ubHkgY3JlYXRlIHRob3NlCj4g PiAKPiA+IFRvIGJlIGNsZWFyLCBsYXJnZSBmb2xpb3MgZm9yIGJ1ZmZlci1oZWFkcy4KPiA+ID4g aWYKPiA+ID4geW91IGhhdmUgYW4gTEJTIGRldmljZSBhbmQgYXJlIGxldmVyYWdpbmcgdGhlIGJs b2NrIGRldmljZSBjYWNoZSBvciBhCj4gPiA+IGZpbGVzeXN0ZW0gd2l0aCBidWZmZXItaGVhZHMg d2l0aCBMQlMgKHRoZXkgZG9uJ3QgZXhpc3QgeWV0IG90aGVyIHRoYW4KPiA+ID4gdGhlIGJsb2Nr IGRldmljZSBjYWNoZSkuCj4gCj4gTXkgZ3Vlc3MgaXMgdGhhdCB1ZGV2IG9yIHNvbWV0aGluZyB0 cmllcyB0byByZWFkIHRoZSBkaXNrIGxhYmVsIGluCj4gcmVzcG9uc2UgdG8gc29tZSB1ZXZlbnQg KG1rZnMsIG1vdW50LCB1bm1vdW50LCBldGMpLCB3aGljaCBjcmVhdGVzIGEKPiBsYXJnZSBmb2xp byBiZWNhdXNlIG1pbl9vcmRlciA+IDAsIGFuZCBhdHRhY2hlcyBhIGJ1ZmZlciBoZWFkLiAgVGhl cmUncwo+IGEgc2VwYXJhdGUgY3Jhc2ggcmVwb3J0IHRoYXQgSSdsbCBjYyB5b3Ugb24uCgpCdXQg eW91IHNhaWQ6Cgo+IHRoZSBtYWNoaW5lIGlzIGFybTY0IHdpdGggNjRrIGJhc2VwYWdlcyBhbmQg NGsgZnNibG9jayBzaXplOgoKc28gdGhhdCBzaG91bGRuJ3QgYmUgdXNpbmcgbGFyZ2UgZm9saW9z IGJlY2F1c2UgeW91IHNob3VsZCBoYXZlIHNldCB0aGUKb3JkZXIgdG8gMC4gIFJpZ2h0PyAgT3Ig ZGlkIHlvdSBtaXMtc3BlYWsgYW5kIHVzZSBhIDRLIFBBR0VfU0laRSBrZXJuZWwKd2l0aCBhIDY0 ayBmc2Jsb2Nrc2l6ZT8KCi0tIApNYWlsaW5nIGxpc3QgaW5mbzogaHR0cHM6Ly9saXN0cy5saW51 eC5pdC9saXN0aW5mby9sdHAK