From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id 11BB98D0039 for ; Sat, 19 Feb 2011 01:22:47 -0500 (EST) From: ebiederm@xmission.com (Eric W. Biederman) References: <20110216185234.GA11636@tiehlicka.suse.cz> <20110216193700.GA6377@elte.hu> <20110217090910.GA3781@tiehlicka.suse.cz> <20110217163531.GF14168@elte.hu> <20110218122938.GB26779@tiehlicka.suse.cz> <20110218162623.GD4862@tiehlicka.suse.cz> Date: Fri, 18 Feb 2011 22:22:32 -0800 In-Reply-To: (Linus Torvalds's message of "Fri, 18 Feb 2011 08:39:02 -0800") Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Subject: Re: BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4 Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds Cc: Michal Hocko , Ingo Molnar , linux-mm@kvack.org, LKML , David Miller , Eric Dumazet Linus Torvalds writes: > On Fri, Feb 18, 2011 at 8:26 AM, Michal Hocko wrote: >>> Now, I will try with the 2 patches patches in this thread. I will also >>> turn on DEBUG_LIST and DEBUG_PAGEALLOC. >> >> I am not able to reproduce with those 2 patches applied. > > Thanks for verifying. Davem/EricD - you can add Michal's tested-by to > the patches too. > > And I think we can consider this whole thing solved. It hopefully also > explains all the other random crashes that EricB saw - just random > memory corruption in other datastructures. > > EricB - do all your stress-testers run ok now? > > Linus It looks like the same problematic dellink pattern made it into net_namespace.c, and your new LIST_DEBUG changes caught it. I will cook up a patch after I get some sleep. Eric ------------[ cut here ]------------ WARNING: at lib/list_debug.c:53 __list_del_entry+0xa1/0xd0() Hardware name: X7DWU list_del corruption. prev->next should be ffff88005fc12140, but was (null) Modules linked in: macvtap ipt_LOG xt_limit ipt_REJECT xt_hl xt_state dummy tulip xt_tcpudp iptable_filter inet_diag veth macvlan nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc dm_mirror dm_region_hash dm_log uinput bonding ipv6 kvm_intel kvm fuse xt_multiport iptable_nat ip_tables nf_nat x_tables nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 tun 8021q iTCO_wdt microcode iTCO_vendor_support ghes hed sg i5k_amb i5400_edac ioatdma edac_core i2c_i801 serio_raw pcspkr dca shpchp radeon ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core sr_mod ehci_hcd cdrom netxen_nic uhci_hcd igb dm_mod [last unloaded: mperf] Pid: 4865, comm: kworker/u:0 Tainted: G W 2.6.38-rc4-359399.2010AroraKernelBeta.fc14.x86_64 #1 Call Trace: [] ? warn_slowpath_common+0x7a/0xb0 [] ? warn_slowpath_fmt+0x41/0x50 [] ? rtnl_lock+0x12/0x20 [] ? __rtnl_unlock+0x10/0x20 [] ? __list_del_entry+0xa1/0xd0 [] ? unregister_netdevice_queue+0x34/0xa0 [] ? veth_dellink+0x20/0x40 [veth] [] ? default_device_exit_batch+0x61/0xe0 [] ? ops_exit_list.clone.0+0x53/0x60 [] ? cleanup_net+0x100/0x1b0 [] ? process_one_work+0x187/0x4b0 [] ? process_one_work+0x121/0x4b0 [] ? cleanup_net+0x0/0x1b0 [] ? worker_thread+0x15c/0x330 [] ? worker_thread+0x0/0x330 [] ? kthread+0xb6/0xc0 [] ? kernel_thread_helper+0x4/0x10 [] ? _raw_spin_unlock_irq+0x2b/0x40 [] ? restore_args+0x0/0x30 [] ? kthread+0x0/0xc0 [] ? kernel_thread_helper+0x0/0x10 ---[ end trace bcdbebbab42b1e76 ]--- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org