Hi,
Just testing my latest 2.6.35.9 kernel by playing WoW (with multiple Java processes and a VPN running in the background) when I saw this BUG (below). I've never seen anything like this before with earlier kernels and so doubt that this is a hardware error. I suppose it *might* be caused by a bad incremental build, and so I've deleted all my .o and .ko files and rebuilt my kernel. But it could equally be something deeper (and nastier).
The hardware is a dual hyperthreaded P4 Xeon (4 logical CPUs) with 2 GB of RAM and a RV350 graphics card.
Cheers,
Chris
-- snip ------------------------------------------------------------
swap_free: Unused swap offset entry 0000006c
BUG: Bad page map in process explorer.exe pte:0000d800 pmd:36a23067
addr:7e9d6000 vm_flags:08000075 anon_vma:(null) mapping:ecb94fc8 index:99
vma->vm_ops->fault: filemap_fault+0x0/0x30c
vma->vm_file->f_op->mmap: generic_file_mmap+0x0/0x39
Pid: 21815, comm: explorer.exe Not tainted 2.6.35.9 #1
Call Trace:
[<c107105b>] ? print_bad_pte+0x138/0x149
[<c107b415>] ? swap_info_get+0x5a/0x80
[<c10723f3>] ? unmap_vmas+0x36d/0x584
[<c10758a9>] ? exit_mmap+0x9b/0x131
[<c1022b1a>] ? mmput+0x30/0xa4
[<c102702b>] ? exit_mm+0xe4/0xec
[<c10535a4>] ? audit_free+0x15f/0x181
[<c1027200>] ? do_exit+0x1cd/0x5c4
[<c10201a8>] ? sub_preempt_count+0x74/0x80
[<c11e3849>] ? _raw_spin_unlock_irq+0xd/0x20
[<c10277f9>] ? do_group_exit+0x5a/0x7d
[<c102782d>] ? sys_exit_group+0x11/0x14
[<c100270c>] ? sysenter_do_call+0x12/0x22
Disabling lock debugging due to kernel taint
BUG: Bad page map in process explorer.exe pte:186f3747 pmd:36a23067
addr:7e9de000 vm_flags:08100073 anon_vma:f3115510 mapping:ecb94fc8 index:a1
vma->vm_ops->fault: filemap_fault+0x0/0x30c
vma->vm_file->f_op->mmap: generic_file_mmap+0x0/0x39
Pid: 21815, comm: explorer.exe Tainted: G B 2.6.35.9 #1
Call Trace:
[<c107105b>] ? print_bad_pte+0x138/0x149
[<c1071771>] ? vm_normal_page+0x26/0x4d
[<c1072222>] ? unmap_vmas+0x19c/0x584
[<c10758a9>] ? exit_mmap+0x9b/0x131
[<c1022b1a>] ? mmput+0x30/0xa4
[<c102702b>] ? exit_mm+0xe4/0xec
[<c10535a4>] ? audit_free+0x15f/0x181
[<c1027200>] ? do_exit+0x1cd/0x5c4
[<c10201a8>] ? sub_preempt_count+0x74/0x80
[<c11e3849>] ? _raw_spin_unlock_irq+0xd/0x20
[<c10277f9>] ? do_group_exit+0x5a/0x7d
[<c102782d>] ? sys_exit_group+0x11/0x14
[<c100270c>] ? sysenter_do_call+0x12/0x22
------------[ cut here ]------------
WARNING: at /home/chris/LINUX/linux-2.6.35/fs/buffer.c:668 __set_page_dirty+0x3d/0x7f()
Hardware name: Precision WorkStation 650
Modules linked in: snd_seq_oss snd_seq_midi snd_seq_dummy tun nfs fuse cpufreq_ondemand nfsd lockd auth_rpcgss exportfs autofs4 sunrpc p4_clockmod speedstep_lib af_packet ipt_LOG xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_LOG nf_conntrack_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables x_tables ipv6 binfmt_misc dm_mirror dm_region_hash dm_log dm_mod uinput snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_event snd_seq_midi_emul snd_emu10k1 snd_ac97_codec snd_usb_audio ac97_bus snd_seq snd_pcm snd_timer joydev ppdev uvcvideo snd_usbmidi_lib psmouse usbhid snd_page_alloc snd_util_mem parport_pc floppy videodev serio_raw firewire_ohci parport snd_hwdep firewire_core crc_itu_t v4l1_compat dcdbas snd_rawmidi snd_seq_device snd pcspkr sg i2c_i801 soundcore ext3 jbd mbcache sr_mod cdrom sd_mod sata_sil pata_acpi uhci_hcd ata_piix libata ehci_hcd scsi_mod e1000 usbcore thermal button radeon intel_agp ttm
drm_kms_helper drm agpgart i2c_algo_bit cfbcopyarea cfbimgblt cfbfillrect [last unloaded: mperf]
Pid: 21794, comm: WoW.exe Tainted: G B 2.6.35.9 #1
Call Trace:
[<c10248a6>] ? warn_slowpath_common+0x6a/0x7d
[<c10a3f7d>] ? __set_page_dirty+0x3d/0x7f
[<c10248c6>] ? warn_slowpath_null+0xd/0x10
[<c10a3f7d>] ? __set_page_dirty+0x3d/0x7f
[<c10a41e6>] ? __set_page_dirty_buffers+0x77/0x81
[<c10669c8>] ? set_page_dirty+0x2f/0x4c
[<c1072310>] ? unmap_vmas+0x28a/0x584
[<c1074907>] ? unmap_region+0xab/0x13d
[<c10756c0>] ? do_munmap+0x1c0/0x208
[<c1076056>] ? mmap_region+0x78/0x395
[<c107669f>] ? sys_mmap_pgoff+0x75/0x9a
[<c100270c>] ? sysenter_do_call+0x12/0x22
---[ end trace 4098e2b13de2a43d ]---
BUG: Bad page map in process WoW.exe pte:28c60047 pmd:351e9067
page:c186cc00 count:2 mapcount:-1 mapping:f6c23740 index:0x92702b
page flags: 0x40000874(referenced|dirty|lru|active|private)
addr:041c3000 vm_flags:00100073 anon_vma:f518d930 mapping:(null) index:41c3
Pid: 21794, comm: WoW.exe Tainted: G B W 2.6.35.9 #1
Call Trace:
[<c107105b>] ? print_bad_pte+0x138/0x149
[<c106eebf>] ? __dec_zone_state+0x13/0x6a
[<c1072359>] ? unmap_vmas+0x2d3/0x584
[<c1074907>] ? unmap_region+0xab/0x13d
[<c10756c0>] ? do_munmap+0x1c0/0x208
[<c1076056>] ? mmap_region+0x78/0x395
[<c107669f>] ? sys_mmap_pgoff+0x75/0x9a
[<c100270c>] ? sysenter_do_call+0x12/0x22
BUG: Bad page map in process java pte:1e6b0047 pmd:35e36067
page:c1721600 count:2 mapcount:-1 mapping:f6c23740 index:0x93a804
page flags: 0x40000874(referenced|dirty|lru|active|private)
addr:94f4d000 vm_flags:00100077 anon_vma:f5a9e540 mapping:(null) index:94f4d
Pid: 19805, comm: java Tainted: G B W 2.6.35.9 #1
Call Trace:
[<c107105b>] ? print_bad_pte+0x138/0x149
[<c106eebf>] ? __dec_zone_state+0x13/0x6a
[<c1072359>] ? unmap_vmas+0x2d3/0x584
[<c10758a9>] ? exit_mmap+0x9b/0x131
[<c1022b1a>] ? mmput+0x30/0xa4
[<c102702b>] ? exit_mm+0xe4/0xec
[<c10535a4>] ? audit_free+0x15f/0x181
[<c1027200>] ? do_exit+0x1cd/0x5c4
[<c102d520>] ? recalc_sigpending+0xf/0x2a
[<c102dcbb>] ? dequeue_signal+0xa4/0x114
[<c10277f9>] ? do_group_exit+0x5a/0x7d
[<c102f0fe>] ? get_signal_to_deliver+0x342/0x359
[<c1001b74>] ? do_signal+0x58/0x674
[<c1021886>] ? try_to_wake_up+0x22a/0x246
[<c10093aa>] ? syscall_trace_leave+0x29/0xc3
[<c105e12d>] ? perf_event_task_sched_in+0xe/0x77
[<c11e3849>] ? _raw_spin_unlock_irq+0xd/0x20
[<c1042207>] ? sys_futex+0xe6/0xf3
[<c1053723>] ? audit_syscall_entry+0x15d/0x17f
[<c10023fe>] ? do_notify_resume+0x20/0x56
[<c11e3e1a>] ? work_notifysig+0x13/0x19