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Subject2.6.21-rc7-mm2 crash: Eeek! page_mapcount(page) went negative! (-1)
With kernel 2.6.21-rc7-mm2, my Dell Optiplex GX110 (P3/933) regularly
crashes during the SuSE 10.1 startup sequence. When booting to RL5,
it panicblinks shortly after the graphical login screen appears.
Booting to RL3, it hangs after the startup message:

Starting Firewall Initialization (phase 2 of 2)

(the last message before "runlevel 3 has been reached") logging this:

[ 57.138955] Eeek! page_mapcount(page) went negative! (-1)
[ 57.139040] page pfn = 0
[ 57.139053] page->flags = 400
[ 57.139066] page->count = 1
[ 57.139079] page->mapping = 00000000
[ 57.139111] vma->vm_ops = generic_file_vm_ops+0x0/0x18
[ 57.139147] vma->vm_ops->nopage = 0x0
[ 57.139181] vma->vm_file->f_op->mmap = reiserfs_file_mmap+0x0/0x47
[ 57.139220] ------------[ cut here ]------------
[ 57.139236] kernel BUG at mm/rmap.c:648!
[ 57.139251] invalid opcode: 0000 [#1]
[ 57.139264] PREEMPT
[ 57.139278] Modules linked in: usbserial snd_rtctimer snd_seq_dummy snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device thermal processor fan button battery ac af_packet usb_gigaset ser_gigaset bas_gigaset gigaset isdn slhc crc_ccitt ip6t_REJECT xt_tcpudp ipt_REJECT xt_state iptable_mangle iptable_nat nf_nat iptable_filter ip6table_mangle nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables ip6table_filter ip6_tables x_tables ehci_hcd snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc i2c_i801 uhci_hcd parport_pc lp parport ipv6 nls_iso8859_1 nls_cp437 vfat fat nls_utf8 ntfs dm_mod
[ 57.139447] CPU: 0
[ 57.139450] EIP: 0060:[<c015dfc0>] Not tainted VLI
[ 57.139453] EFLAGS: 00010282 (2.6.21-rc7-mm2-noinitrd #1)
[ 57.139506] EIP is at page_remove_rmap+0xd7/0x106
[ 57.139522] eax: 0000004b ebx: c1000000 ecx: 00000001 edx: 00000002
[ 57.139541] esi: c309fde0 edi: b7f24000 ebp: c373ec90 esp: c373ec78
[ 57.139559] ds: 007b es: 007b fs: 0000 gs: 0000 ss: 0068
[ 57.139577] Process getcfg-interfac (pid: 4343, ti=c373e000 task=c18734d0 task.ti=c373e000)
[ 57.139586] Stack: c042abb5 00000000 c373ec90 c13f91c0 c1000000 c373dc90 c373ecf0 c0158df4
[ 57.139618] c04f2ac4 00000001 00000000 c309fde0 c373ed10 00005ff1 00000000 00000001
[ 57.139647] b7f62000 c374cb7c c374cb7c c374cb7c c373b344 fffffffe 00000000 c0569c2c
[ 57.139677] Call Trace:
[ 57.139721] [<c0158df4>] unmap_vmas+0x2d7/0x4c9
[ 57.139748] [<c015b7dd>] exit_mmap+0x68/0xeb
[ 57.139772] [<c01191b0>] mmput+0x52/0xcb
[ 57.139805] [<c011c368>] exit_mm+0xbb/0xc3
[ 57.139832] [<c011d188>] do_exit+0x1ea/0x73e
[ 57.139857] [<c011d74d>] sys_exit_group+0x0/0x13
[ 57.139880] [<c012524e>] get_signal_to_deliver+0x6cd/0x6f8
[ 57.139917] [<c01036cf>] do_notify_resume+0x91/0x692
[ 57.139944] [<c0103f15>] work_notifysig+0x13/0x1a
[ 57.139970] [<b7f6b7a8>] 0xb7f6b7a8
[ 57.139988] =======================
[ 57.140002] INFO: lockdep is turned off.
[ 57.140015] Code: c0 74 0d 8b 50 0c b8 e5 ab 42 c0 e8 d7 fa fd ff 8b 46 48 85 c0 74 14 8b 40 10 85 c0 74 0d 8b 50 2c b8 04 ac 42 c0 e8 bc fa fd ff <0f> 0b eb fe 8b 53 10 8b 03 83 e2 01 f7 da c1 e8 1e 83 c2 04 69
[ 57.140133] EIP: [<c015dfc0>] page_remove_rmap+0xd7/0x106 SS:ESP 0068:c373ec78
[ 57.140191] Fixing recursive fault but reboot is needed!
[ 57.140209] BUG: scheduling while atomic: getcfg-interfac/0x00000002/4343
[ 57.140225] INFO: lockdep is turned off.
[ 57.140247] [<c0104e80>] dump_trace+0x61/0x1e4
[ 57.140275] [<c010501d>] show_trace_log_lvl+0x1a/0x30
[ 57.140298] [<c0105fe9>] show_trace+0x12/0x14
[ 57.140322] [<c0106000>] dump_stack+0x15/0x17
[ 57.140344] [<c0380849>] schedule+0x6e/0x52c
[ 57.140383] [<c011d08f>] do_exit+0xf1/0x73e
[ 57.140407] [<c010569b>] die+0x1b7/0x1bf
[ 57.140429] [<c0105a66>] do_trap+0x8d/0xa7
[ 57.140451] [<c0105dd2>] do_invalid_op+0x88/0x92
[ 57.140474] [<c03833ba>] error_code+0x6a/0x70
[ 57.140500] [<c015dfc0>] page_remove_rmap+0xd7/0x106
[ 57.140525] [<c0158df4>] unmap_vmas+0x2d7/0x4c9
[ 57.140548] [<c015b7dd>] exit_mmap+0x68/0xeb
[ 57.140571] [<c01191b0>] mmput+0x52/0xcb
[ 57.140593] [<c011c368>] exit_mm+0xbb/0xc3
[ 57.140615] [<c011d188>] do_exit+0x1ea/0x73e
[ 57.140638] [<c011d74d>] sys_exit_group+0x0/0x13
[ 57.140661] [<c012524e>] get_signal_to_deliver+0x6cd/0x6f8
[ 57.140686] [<c01036cf>] do_notify_resume+0x91/0x692
[ 57.140708] [<c0103f15>] work_notifysig+0x13/0x1a
[ 57.140731] [<b7f6b7a8>] 0xb7f6b7a8
[ 57.140749] =======================

followed by a couple of these:

[ 87.264940] BUG: sleeping function called from invalid context at mm/slab.c:3054
[ 87.265023] in_atomic():1, irqs_disabled():0
[ 87.265038] INFO: lockdep is turned off.
[ 87.265079] [<c0104e80>] dump_trace+0x61/0x1e4
[ 87.265119] [<c010501d>] show_trace_log_lvl+0x1a/0x30
[ 87.265161] [<c0105fe9>] show_trace+0x12/0x14
[ 87.265187] [<c0106000>] dump_stack+0x15/0x17
[ 87.265210] [<c01177b3>] __might_sleep+0xc7/0xcd
[ 87.265241] [<c0168548>] __kmalloc_track_caller+0x67/0xe9
[ 87.265281] [<c0156e0b>] __kzalloc+0x13/0x3d
[ 87.265312] [<c0226a6c>] kobject_get_path+0x3b/0x94
[ 87.265342] [<c02b4004>] dev_uevent+0x2d0/0x36a
[ 87.265375] [<c02b36ac>] show_uevent+0x94/0xe4
[ 87.265400] [<c02b34fd>] dev_attr_show+0x1b/0x1f
[ 87.265424] [<c01a7ac0>] sysfs_read_file+0x17f/0x1b0
[ 87.265454] [<c016bbf8>] vfs_read+0xaf/0x138
[ 87.265479] [<c016c476>] sys_read+0x3d/0x61
[ 87.265503] [<c0103dc2>] sysenter_past_esp+0x5f/0x99
[ 87.265531] [<b7fd7410>] 0xb7fd7410
[ 87.265568] =======================
separated by 20 or 40 second pauses, before rebooting spontaneously.

2.6.21-rc7-mm1 crashed too. 2.6.21 runs fine.

Please let me know if you need more information or want me to test
anything.

HTH
T.

--
Tilman Schmidt E-Mail: tilman@imap.cc
Bonn, Germany
- In theory, there is no difference between theory and practice.
In practice, there is.

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