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 043F5CCA483 for ; Wed, 20 Jul 2022 23:15:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231757AbiGTXP4 (ORCPT ); Wed, 20 Jul 2022 19:15:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36250 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231676AbiGTXPx (ORCPT ); Wed, 20 Jul 2022 19:15:53 -0400 Received: from smtp.gentoo.org (woodpecker.gentoo.org [140.211.166.183]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E122B66AFF; Wed, 20 Jul 2022 16:15:50 -0700 (PDT) Content-Type: multipart/signed; boundary="Apple-Mail=_1A5477F2-D165-412B-B925-92359613B8D1"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.1\)) Subject: Re: WARNING: CPU: 1 PID: 14735 at fs/dcache.c:365 dentry_free+0x100/0x128 From: Sam James In-Reply-To: Date: Thu, 21 Jul 2022 00:15:43 +0100 Cc: Hillf Danton , Helge Deller , John David Anglin , linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linux-fsdevel@vger.kernel.org Message-Id: <9B4CB715-FEA1-4991-ABA1-23B2DF203258@gentoo.org> References: <20220709090756.2384-1-hdanton@sina.com> <20220715133300.1297-1-hdanton@sina.com> <860792bb-1fd6-66c6-ef31-4edd181e2954@gmx.de> <20220720110032.1787-1-hdanton@sina.com> To: Al Viro , Helge Deller X-Mailer: Apple Mail (2.3696.120.41.1.1) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Apple-Mail=_1A5477F2-D165-412B-B925-92359613B8D1 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii > On 20 Jul 2022, at 18:06, Al Viro wrote: > > On Wed, Jul 20, 2022 at 07:00:32PM +0800, Hillf Danton wrote: > >> To help debug it, de-union d_in_lookup_hash with d_alias and add debug >> info after dentry is killed. If any warning hits, we know where to add >> something like >> >> WARN_ON(dentry->d_flags & DCACHE_DENTRY_KILLED); >> >> before hlist_bl_add or hlist_add. > [snip] > I wonder if anyone had seen anything similar outside of parisc... > I don't know if I have any chance to reproduce it here - the only > parisc box I've got is a 715/100 (assuming the disk is still alive) > and it's 32bit, unlike the reported setups and, er, not fast. > qemu seems to have some parisc support, but it's 32bit-only at the > moment... I don't think I've seen this on parisc either, but I don't think I've used tmpfs that heavily. I'll try it in case it's somehow more likely to trigger it. Helge, were there any particular steps to reproduce this? Or just start doing your normal Debian builds on a tmpfs and it happens soon enough? --Apple-Mail=_1A5477F2-D165-412B-B925-92359613B8D1 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iNUEARYKAH0WIQQlpruI3Zt2TGtVQcJzhAn1IN+RkAUCYtiMn18UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0MjVB NkJCODhERDlCNzY0QzZCNTU0MUMyNzM4NDA5RjUyMERGOTE5MAAKCRBzhAn1IN+R kC/ZAP41H2nChPS5kcT3/RPjAriOl8IqbRAX0xhphni9gDrL0wEA5pTvzToiSULd MSJA6dtocW+ZwQjPiokSt8vHK6HKCgI= =tB0a -----END PGP SIGNATURE----- --Apple-Mail=_1A5477F2-D165-412B-B925-92359613B8D1--