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SubjectRe: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U3
On Friday 15 October 2004 12:26, Ingo Molnar wrote:
> i have released the -U3 PREEMPT_REALTIME patch:

i'm not sure if this bug depends on preemption patch, or if it is a general
one in -mm1 tree.

kernel BUG at fs/fat/cache.c:150!
invalid operand: 0000 [#1]
Modules linked in: ipx p8022 psnap llc nvidia snd_mixer_oss sd_mod tda9887
tuner saa7134 video_buf v4l2_common v4l1_compat ir_common videodev 8139too
sis900 crc32 ehci_hcd usb_storage scsi_mod ohci_hcd usbcore snd_intel8x0
snd_ac97_codec snd_pcm snd_timer snd soundcore snd_page_alloc ohci1394
ieee1394 i2c_sis96x i2c_core
CPU: 0
EIP: 0060:[<c01a0b53>] Tainted: P VLI
EFLAGS: 00210202 (2.6.9-rc4-mm1-vp-u3)
EIP is at fat_cache_add+0x135/0x151
eax: 00000001 ebx: cf5712b8 ecx: c656f780 edx: cf571201
esi: ce414c50 edi: c656f768 ebp: c656f7b8 esp: ce414c1c
ds: 007b es: 007b ss: 0068 preempt: 00000001
Process mplayer (pid: 9843, threadinfo=ce414000 task=c8128a20)
Stack: c656f7b8 ce414c88 cf785800 00000001 c656f768 c01a11bb ce414c88 ce414c8c
c6d06300 00000000 c8128a20 0003ffff c656f7b8 00000000 00000000 00000001
000db50e c656f7b8 c656f768 cf785800 cee1d800 c01a12c1 ce414c8c 00200246
Call Trace:
[<c01a11bb>] fat_get_cluster+0x11f/0x1de
[<c01a12c1>] fat_bmap_cluster+0x47/0x98
[<c01a13f1>] fat_bmap+0xdf/0x101
[<c01a36e8>] fat_get_block+0x30/0x198
[<c0152866>] alloc_buffer_head+0x33/0x52
[<c01501ea>] create_buffers+0x51/0x86
[<c015141c>] block_read_full_page+0x1bd/0x2cc
[<c01a36b8>] fat_get_block+0x0/0x198
[<c0132f0c>] add_to_page_cache+0x58/0x6e
[<c013a0e4>] read_pages+0xbe/0x15e
[<c013a49c>] do_page_cache_readahead+0x120/0x19b
[<c013a606>] page_cache_readahead+0xef/0x1f8
[<c01336ab>] do_generic_mapping_read+0x133/0x54b
[<c013c911>] lru_cache_add+0xd/0x4f
[<c0133d53>] __generic_file_aio_read+0x1a3/0x218
[<c0133ac3>] file_read_actor+0x0/0xed
[<c0133ec5>] generic_file_read+0x9c/0xba
[<c012b84c>] _mutex_lock+0x20/0x36
[<c01244c8>] do_sigaction+0x1dc/0x1f7
[<c012b468>] autoremove_wake_function+0x0/0x43
[<c012b84c>] _mutex_lock+0x20/0x36
[<c0167974>] dnotify_parent+0x35/0x95
[<c014e0a9>] vfs_read+0xcd/0x126
[<c014e36f>] sys_read+0x41/0x6a
[<c0103f7b>] syscall_call+0x7/0xb
Code: f2 89 e8 e8 9f fe ff ff 85 c0 89 c3 74 2a 83 6f 20 01 8b 04 24 39 00 75
24 8b 14 24 a1 74 0b 3c c0 e8 9c b1 f9 ff e9 40 ff ff ff <0f> 0b 96 00 e5 b7
2d c0 e9 2f ff ff ff 8b 1c 24 eb 88 0f 0b 48
<5>Attached scsi generic sg0 at scsi1, channel 0, id 0, lun 0, type 0

best regards,
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