From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp4-g21.free.fr ([212.27.42.4]:36751 "EHLO smtp4-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753168AbcANUNJ (ORCPT ); Thu, 14 Jan 2016 15:13:09 -0500 Received: from bender.morinfr.org (unknown [81.57.171.53]) by smtp4-g21.free.fr (Postfix) with ESMTPS id 986D84C8059 for ; Thu, 14 Jan 2016 21:11:58 +0100 (CET) Received: from guillaum by bender.morinfr.org with local (Exim 4.84) (envelope-from ) id 1aJoGY-0006Nn-HD for linux-nfs@vger.kernel.org; Thu, 14 Jan 2016 21:13:06 +0100 Date: Thu, 14 Jan 2016 21:13:06 +0100 From: Guillaume Morin To: linux-nfs@vger.kernel.org Subject: 4.1.13: nfs_have_writebacks(inode) warning triggered in nfs_clear_inode Message-ID: <20160114201306.GA22752@bender.morinfr.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-nfs-owner@vger.kernel.org List-ID: I have a machine running 4.1.13 where this warning triggered. Before you ask, I have a few machines running that kernel with the same nfs mounts and roughly the same workload and it happened only this one time. So I am guessing it will be hard to reproduce [949229.574284] ------------[ cut here ]------------ [949229.574306] WARNING: CPU: 11 PID: 100 at fs/nfs/inode.c:121 nfs_clear_inode+0x6a/0xa0 [nfs]() [949229.574319] Modules linked in: tcp_diag inet_diag nfnetlink_queue nfnetlink_log nfnetlink nfsd nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs lockd grace sunrpc fscache rdma_ucm rdma_cm iw_cm ib_uverbs ib_cm ib_sa ib_mad ib_core ib_addr hhostname(O) ipmi_watchdog binfmt_misc gpio_ich serio_raw pcspkr coretemp i2c_i801 lpc_ich ioatdma mfd_core dca i5500_temp ipmi_si ipmi_poweroff ipmi_devintf ipv6 autofs4 sr_mod cdrom sg usbhid crc32c_intel uhci_hcd ehci_pci ehci_hcd ahci libahci usbcore usb_common [949229.574356] CPU: 11 PID: 100 Comm: kswapd0 Tainted: G O 4.1.13 #1 [949229.574357] Hardware name: Supermicro X8DTU/X8DTU, BIOS 2.1a 09/21/11 [949229.574358] ffffffffa0e92623 ffff880630093af8 ffffffff81591e69 0000000000000007 [949229.574361] 0000000000000000 ffff880630093b38 ffffffff8105925a 000000214190340a [949229.574363] ffff88012aef4ac8 ffff88012aef4bc8 ffffffffa0e90b80 ffff880630093cf8 [949229.574365] Call Trace: [949229.574371] [] dump_stack+0x45/0x57 [949229.574375] [] warn_slowpath_common+0x8a/0xc0 [949229.574377] [] warn_slowpath_null+0x1a/0x20 [949229.574384] [] nfs_clear_inode+0x6a/0xa0 [nfs] [949229.574392] [] nfs_evict_inode+0x2d/0x40 [nfs] [949229.574395] [] evict+0xb3/0x1a0 [949229.574397] [] dispose_list+0x41/0x50 [949229.574399] [] prune_icache_sb+0x4b/0x60 [949229.574402] [] super_cache_scan+0x15f/0x1b0 [949229.574406] [] shrink_slab.part.56.constprop.68+0x1b9/0x340 [949229.574409] [] shrink_zone+0x155/0x190 [949229.574410] [] kswapd+0x510/0x980 [949229.574413] [] ? zone_reclaim+0x220/0x220 [949229.574417] [] kthread+0xdb/0x100 [949229.574419] [] ? kthread_create_on_node+0x180/0x180 [949229.574422] [] ret_from_fork+0x42/0x70 [949229.574424] [] ? kthread_create_on_node+0x180/0x180 [949229.574426] ---[ end trace 119ebcc8a1a978af ]--- -- Guillaume Morin