From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [Bug 10575] New: WARNING: at mm/slub.c:2444 Date: Tue, 29 Apr 2008 08:22:31 -0700 Message-ID: <20080429082231.2c5470ff.akpm@linux-foundation.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: bugme-daemon@bugzilla.kernel.org, netdev@vger.kernel.org, Patrick McHardy To: htmldeveloper@gmail.com Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:39790 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752244AbYD2PXI (ORCPT ); Tue, 29 Apr 2008 11:23:08 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: (switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Tue, 29 Apr 2008 06:31:36 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=10575 > > Summary: WARNING: at mm/slub.c:2444 > Product: Memory Management > Version: 2.5 > KernelVersion: 2.6.25-sched-devel.git-x86-latest.git > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Slab Allocator > AssignedTo: akpm@osdl.org > ReportedBy: htmldeveloper@gmail.com > > > kernel version: > > cat include/config/kernel.release > 2.6.25-sched-devel.git-x86-latest.git > > Distribution: > > FC6 > > Hardware Environment: > Software Environment: > Problem Description: > > Shutting down the system generated the following errors: > > Apr 28 00:20:22 funnyman libvirtd: Shutting down on signal 15 > Apr 28 00:20:25 funnyman kernel: sky2 eth0: Link is down. > Apr 28 00:20:25 funnyman xinetd[3373]: Exiting... > Apr 28 00:20:30 funnyman kernel: ------------[ cut here ]------------ > Apr 28 00:20:30 funnyman kernel: WARNING: at mm/slub.c:2444 > kmem_cache_destroy+0xfe/0x108() > Apr 28 00:20:30 funnyman kernel: Modules linked in: rfcomm hidp l2cap bluetooth > button ext2 btrfs hfsplus usb_storage nls_utf8 bridge autofs4 nf_conntrack(-) > xt_tcpudp x_tables sunrpc loop dm_multipath video output sbs sbshc battery ac > ipv6 parport_pc lp parport snd_usb_audio snd_usb_lib snd_rawmidi snd_hwdep > snd_hda_intel snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq > snd_seq_device snd_pcm_oss sg firewire_ohci snd_mixer_oss snd_pcm firewire_core > crc_itu_t snd_timer snd pata_jmicron soundcore serio_raw sky2 snd_page_alloc > pcspkr i2c_i801 iTCO_wdt iTCO_vendor_support i2c_core floppy dm_snapshot > dm_zero dm_mirror dm_mod ahci ata_generic ata_piix libata sd_mod scsi_mod ext3 > jbd ehci_hcd ohci_hcd uhci_hcd [last unloaded: xt_state] > Apr 28 00:20:30 funnyman kernel: Pid: 11669, comm: modprobe Not tainted > 2.6.25-sched-devel.git-x86-latest.git #1 > Apr 28 00:20:30 funnyman kernel: [] warn_on_slowpath+0x46/0x56 > Apr 28 00:20:30 funnyman kernel: [] ? apic_wait_icr_idle+0x16/0x1d > Apr 28 00:20:30 funnyman kernel: [] ? > __send_IPI_dest_field+0x50/0x54 > Apr 28 00:20:30 funnyman kernel: [] ? send_IPI_mask+0xd/0xf > Apr 28 00:20:30 funnyman kernel: [] ? > get_pageblock_flags_group+0x50/0x6e > Apr 28 00:20:30 funnyman kernel: [] ? > get_pageblock_migratetype+0x24/0x27 > Apr 28 00:20:30 funnyman kernel: [] ? free_hot_page+0xf/0x11 > Apr 28 00:20:30 funnyman kernel: [] ? __free_pages+0x20/0x2b > Apr 28 00:20:30 funnyman kernel: [] ? __free_slab+0xac/0xb4 > Apr 28 00:20:30 funnyman kernel: [] kmem_cache_destroy+0xfe/0x108 > Apr 28 00:20:30 funnyman kernel: [] nf_conntrack_cleanup+0x53/0x7a > [nf_conntrack] > Apr 28 00:20:30 funnyman kernel: [] > nf_conntrack_standalone_fini+0x1c/0x1e [nf_conntrack] > Apr 28 00:20:30 funnyman kernel: [] sys_delete_module+0x177/0x1af > Apr 28 00:20:30 funnyman kernel: [] ? remove_vma+0x31/0x53 > Apr 28 00:20:30 funnyman kernel: [] ? do_munmap+0x182/0x19c > Apr 28 00:20:30 funnyman kernel: [] sysenter_past_esp+0x6a/0x90 > Apr 28 00:20:30 funnyman kernel: [] ? pci_scan_bridge+0x1dc/0x2eb > Apr 28 00:20:30 funnyman hcid[9436]: Got disconnected from the system message > bus > Apr 28 00:20:30 funnyman kernel: ======================= > Apr 28 00:20:30 funnyman rpc.statd[2994]: Caught signal 15, un-registering and > exiting. > Apr 28 00:20:30 funnyman kernel: ---[ end trace eb2ec02455daeda8 ]--- > Apr 28 00:20:30 funnyman portmap[11769]: connect from 127.0.0.1 to > unset(status): request from unprivileged port > Apr 28 00:20:30 funnyman pcscd: pcscdaemon.c:529:signal_trap() Preparing for > suicide > > and mm/slub.c:2444 are as follows: > > 2433 * Close a cache and release the kmem_cache structure > 2434 * (must be used for caches created using kmem_cache_create) > 2435 */ > 2436 void kmem_cache_destroy(struct kmem_cache *s) > 2437 { > 2438 down_write(&slub_lock); > 2439 s->refcount--; > 2440 if (!s->refcount) { > 2441 list_del(&s->list); > 2442 up_write(&slub_lock); > 2443 if (kmem_cache_close(s)) > 2444 WARN_ON(1); > 2445 sysfs_slab_remove(s); > 2446 } else > 2447 up_write(&slub_lock); > 2448 } > 2449 EXPORT_SYMBOL(kmem_cache_destroy); > > How to reproduce: > > Not sure how, as it occur during shutdown. Looks like nf_contrack is destroying a slab cache which still has live objects. I think this came up a few days ago but I'm not sure if it was fixed?