>
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: [<c042bad6>] warn_on_slowpath+0x46/0x56
> Apr 28 00:20:30 funnyman kernel: [<c0415a33>] ? apic_wait_icr_idle+0x16/0x1d
> Apr 28 00:20:30 funnyman kernel: [<c0415243>] ?
> __send_IPI_dest_field+0x50/0x54
> Apr 28 00:20:30 funnyman kernel: [<c04020e5>] ? send_IPI_mask+0xd/0xf
> Apr 28 00:20:30 funnyman kernel: [<c046773c>] ?
> get_pageblock_flags_group+0x50/0x6e
> Apr 28 00:20:30 funnyman kernel: [<c046777e>] ?
> get_pageblock_migratetype+0x24/0x27
> Apr 28 00:20:30 funnyman kernel: [<c0468472>] ? free_hot_page+0xf/0x11
> Apr 28 00:20:30 funnyman kernel: [<c0468494>] ? __free_pages+0x20/0x2b
> Apr 28 00:20:30 funnyman kernel: [<c047f471>] ? __free_slab+0xac/0xb4
> Apr 28 00:20:30 funnyman kernel: [<c0480754>] kmem_cache_destroy+0xfe/0x108
> Apr 28 00:20:30 funnyman kernel: [<f8d337c0>] nf_conntrack_cleanup+0x53/0x7a
> [nf_conntrack]
> Apr 28 00:20:30 funnyman kernel: [<f8d3766d>]
> nf_conntrack_standalone_fini+0x1c/0x1e [nf_conntrack]
> Apr 28 00:20:30 funnyman kernel: [<c044b56f>] sys_delete_module+0x177/0x1af
> Apr 28 00:20:30 funnyman kernel: [<c0472c00>] ? remove_vma+0x31/0x53
> Apr 28 00:20:30 funnyman kernel: [<c0473468>] ? do_munmap+0x182/0x19c
> Apr 28 00:20:30 funnyman kernel: [<c0404bae>] sysenter_past_esp+0x6a/0x90
> Apr 28 00:20:30 funnyman kernel: [<c0640000>] ? 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.
