From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041228 Firefox/1.0 Fedora/1.0-8 Description of problem: I have experienced several system freezes during the last days, most occur when the system is under interrupt load somehow. Today I managed to grab a panic while using transcode capturing a live tv feed (bttv driver) into a file on disk: Unable to handle kernel paging request at virtual address 5c636467 printing eip: c0145ee5 *pde = 00000000 Oops: 0002 [#1] DEBUG_PAGEALLOC Modules linked in: md5 ipv6 lp autofs4 sunrpc dm_mod joydev ohci1394 ieee1394 uhci_hcd bt878 tuner bttv video_buf i2c_algo_bit v4l2_ common btcx_risc videodev parport_pc parport i2c_viapro i2c_core snd_ens1371 snd_rawmidi snd_seq_device snd_ac97_codec snd_pcm_oss s nd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc gameport 3c59x floppy sr_mod ext3 jbd aic7xxx sd_mod scsi_mod CPU: 0 EIP: 0060:[<c0145ee5>] Not tainted VLI EFLAGS: 00010046 (2.6.10-1.1063_FC4) EIP is at cache_alloc_refill+0x18d/0x27f eax: 5c636463 ebx: e7fed740 ecx: 00000000 edx: e7fed74c esi: cc85f000 edi: 00000005 ebp: c15edef8 esp: c533dcc8 ds: 007b es: 007b ss: 0068 Process transcode (pid: 4305, threadinfo=c533d000 task=d2c49aa0) Stack: e7fed74c 00000050 e7fed740 00000050 00000246 00000001 c01463ed 00000000 00000000 00001000 c016389e 00000000 c0161458 c101dc00 c101dc00 00000000 e3222e44 c101dc00 c0161d22 0000000c e3222e44 c01621d6 c70fb30c c533dd4c Call Trace: [<c01463ed>] kmem_cache_alloc+0x55/0x6b [<c016389e>] alloc_buffer_head+0xd/0x22 [<c0161458>] alloc_page_buffers+0x21/0x8b [<c0161d22>] create_empty_buffers+0x10/0x136 [<c01621d6>] __block_prepare_write+0x91/0x3d2 [<c01460ce>] cache_alloc_debugcheck_after+0xf7/0x125 [<c01463fe>] kmem_cache_alloc+0x66/0x6b [<e8867652>] new_handle+0x15/0x37 [jbd] [<c0162b72>] block_prepare_write+0x16/0x22 [<e887cdc7>] ext3_get_block+0x0/0x6c [ext3] [<e887d266>] ext3_prepare_write+0x56/0xf5 [ext3] [<e887cdc7>] ext3_get_block+0x0/0x6c [ext3] [<c013e769>] generic_file_buffered_write+0x185/0x465 [<c011777c>] __wake_up+0x6e/0xca [<c0217f45>] n_tty_receive_buf+0x100d/0x1044 [<c0217f4d>] n_tty_receive_buf+0x1015/0x1044 [<c0217f45>] n_tty_receive_buf+0x100d/0x1044 [<c013ed86>] __generic_file_aio_write_nolock+0x33d/0x36b [<c013eded>] generic_file_aio_write_nolock+0x39/0x7f [<c013efd5>] generic_file_aio_write+0x70/0xc2 [<e887b0af>] ext3_file_write+0x19/0x8a [ext3] [<c015ebba>] do_sync_write+0x97/0xc9 [<c0131b4a>] autoremove_wake_function+0x0/0x2d [<c0116c25>] recalc_task_prio+0x128/0x133 [<c015eca2>] vfs_write+0xb6/0xe2 [<c015ed6c>] sys_write+0x3c/0x62 [<c010331f>] syscall_call+0x7/0xb Code: 0f b7 46 14 ff 46 10 0f b7 0c 42 66 c7 04 42 fe ff 66 89 4e 14 8b 43 3c 39 46 10 72 a4 89 f2 89 d8 e8 e3 fd ff ff 8b 56 04 8b 06 <89> 50 04 89 02 c7 46 04 00 02 20 00 66 83 7e 14 ff c7 06 00 01 <0>Kernel panic - not syncing: mm/slab.c:2196: spin_lock(mm/slab.c:e7fed784) already locked by mm/slab.c/1976 I will try to get the same for the latest rawhide kernel. Version-Release number of selected component (if applicable): kernel-2.6.10-1.1063_FC4 How reproducible: Sometimes Steps to Reproduce: 1. Unknown. IO/Interrupt load seems to help. 2. 3. Actual Results: system freeze Expected Results: normal operation Additional info:
fixed in subsequent update.