On Wed, Aug 3, 2011 at 4:54 PM, Mel Gorman <mgorman@xxxxxxx> wrote: > On Wed, Aug 03, 2011 at 02:44:20PM +0800, Xiaotian Feng wrote: >> On Tue, Aug 2, 2011 at 3:22 PM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: >> > On Tue, 2 Aug 2011 15:09:57 +0800 Xiaotian Feng <xtfeng@xxxxxxxxx> wrote: >> > >> >> __ __I'm hitting the kernel BUG at mm/vmscan.c:1114 twice, each time I >> >> was trying to build my kernel. The photo of crash screen and my config >> >> is attached. >> > >> > hm, now why has that started happening? >> > >> > Perhaps you could apply this debug patch, see if we can narrow it down? >> > >> >> I will try it then, but it isn't very reproducible :( >> But my system hung after some list corruption warnings... I hit the >> corruption 4 times... >> > > That is very unexpected but if lists are being corrupted, it could > explain the previously reported bug as that bug looked like an active > page on an inactive list. > > What was the last working kernel? Can you bisect? > >> [ 1220.468089] ------------[ cut here ]------------ >> [ 1220.468099] WARNING: at lib/list_debug.c:56 __list_del_entry+0x82/0xd0() >> [ 1220.468102] Hardware name: 42424XC >> [ 1220.468104] list_del corruption. next->prev should be >> ffffea0000e069a0, but was ffff880100216c78 >> [ 1220.468106] Modules linked in: ip6table_filter ip6_tables >> ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 >> xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp >> iptable_filter ip_tables x_tables binfmt_misc bridge stp parport_pc >> ppdev snd_hda_codec_conexant snd_hda_intel snd_hda_codec thinkpad_acpi >> snd_hwdep snd_pcm i915 snd_seq_midi snd_rawmidi arc4 cryptd >> snd_seq_midi_event aes_x86_64 snd_seq drm_kms_helper iwlagn snd_timer >> aes_generic drm snd_seq_device mac80211 psmouse uvcvideo videodev snd >> v4l2_compat_ioctl32 soundcore snd_page_alloc serio_raw i2c_algo_bit >> btusb tpm_tis tpm tpm_bios video cfg80211 bluetooth nvram lp joydev >> parport usbhid hid ahci libahci firewire_ohci firewire_core e1000e >> sdhci_pci sdhci crc_itu_t >> [ 1220.468185] Pid: 1168, comm: Xorg Tainted: G W 3.0.0+ #23 >> [ 1220.468188] Call Trace: >> [ 1220.468190] <IRQ> [<ffffffff8106db3f>] warn_slowpath_common+0x7f/0xc0 >> [ 1220.468201] [<ffffffff8106dc36>] warn_slowpath_fmt+0x46/0x50 >> [ 1220.468206] [<ffffffff81332a52>] __list_del_entry+0x82/0xd0 >> [ 1220.468210] [<ffffffff81332ab1>] list_del+0x11/0x40 >> [ 1220.468216] [<ffffffff8117a212>] __slab_free+0x362/0x3d0 >> [ 1220.468222] [<ffffffff811c6606>] ? bvec_free_bs+0x26/0x40 >> [ 1220.468226] [<ffffffff8117b767>] ? kmem_cache_free+0x97/0x220 >> [ 1220.468230] [<ffffffff811c6606>] ? bvec_free_bs+0x26/0x40 >> [ 1220.468234] [<ffffffff811c6606>] ? bvec_free_bs+0x26/0x40 >> [ 1220.468239] [<ffffffff8117b8df>] kmem_cache_free+0x20f/0x220 >> [ 1220.468243] [<ffffffff811c6606>] bvec_free_bs+0x26/0x40 >> [ 1220.468247] [<ffffffff811c6654>] bio_free+0x34/0x70 >> [ 1220.468250] [<ffffffff811c66a5>] bio_fs_de >> > I'm hitting this again today, when I'm trying to rebuild my kernel.... Looking it a bit list_del corruption. next->prev should be ffffea0000e069a0, but was ffff880100216c78 I find something interesting from my syslog: PERCPU: Embedded 28 pages/cpu @ffff880100200000 s83456 r8192 d23040 u262144 > This warning and the page reclaim warning are on paths that are > commonly used and I would expect to see multiple reports. I wonder > what is happening on your machine that is so unusual. > > Have you run memtest on this machine for a few hours and badblocks > on the disk to ensure this is not hardware trouble? > >> So is it possible that my previous BUG is triggered by slab list corruption? > > Not directly, but clearly there is something very wrong. > > If slub corruption reports are very common and kernel 3.0 is fine, my > strongest candidate for the corruption would be the SLUB lockless > patches. Try > > git diff e4a46182e1bcc2ddacff5a35f6b52398b51f1b11..9e577e8b46ab0c38970c0f0cd7eae62e6dffddee | patch -p1 -R > I will try it now, thanks. > They should revert cleanly with offsets. > > -- > Mel Gorman > SUSE Labs > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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: <a href