Bug#516374: Stuck
I'm experiencing this bug also, with kernel 2.6.26-2-xen-amd64 in a domU
on XenServer 5.5.0. Kernel traces below.
Would using a lenny backport of 2.6.30 be an appropriate workaround? It
appears to be listed on backports.org.
Mar 14 00:10:38 db kernel: [49210.688195] INFO: task mysqld:9248 blocked
for more than 120 seconds.
Mar 14 00:10:38 db kernel: [49210.688210] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 14 00:10:38 db kernel: [49210.688216] mysqld D
ffff8800813bf000 0 9248 9168
Mar 14 00:10:38 db kernel: [49210.688220] ffff8801567837e8
0000000000000282 ffff8801569e87d8 ffff880157265000
Mar 14 00:10:38 db kernel: [49210.688224] ffff880157900780
ffff880155b76140 ffff880157900a00 00000000802fe3de
Mar 14 00:10:38 db kernel: [49210.688227] 0000000000000000
ffffffffa0045ccd ffff880157aed210 ffff8800ffd50198
Mar 14 00:10:38 db kernel: [49210.688230] Call Trace:
Mar 14 00:10:38 db kernel: [49210.688263] [<ffffffffa0045ccd>]
:scsi_mod:scsi_dispatch_cmd+0x1ea/0x26c
Mar 14 00:10:38 db kernel: [49210.688273] [<ffffffffa004bfec>]
:scsi_mod:scsi_request_fn+0x3e1/0x436
Mar 14 00:10:38 db kernel: [49210.688279] [<ffffffff80243d7a>]
getnstimeofday+0x39/0x98
Mar 14 00:10:38 db kernel: [49210.688282] [<ffffffff802ac8a6>]
sync_buffer+0x0/0x3f
Mar 14 00:10:38 db kernel: [49210.688286] [<ffffffff80434e8f>]
io_schedule+0x5c/0x9e
Mar 14 00:10:38 db kernel: [49210.688288] [<ffffffff802ac8e1>]
sync_buffer+0x3b/0x3f
Mar 14 00:10:38 db kernel: [49210.688290] [<ffffffff804350ea>]
__wait_on_bit+0x40/0x6e
Mar 14 00:10:38 db kernel: [49210.688292] [<ffffffff802ac8a6>]
sync_buffer+0x0/0x3f
Mar 14 00:10:38 db kernel: [49210.688294] [<ffffffff80435184>]
out_of_line_wait_on_bit+0x6c/0x78
Mar 14 00:10:38 db kernel: [49210.688297] [<ffffffff8023f513>]
wake_bit_function+0x0/0x23
Mar 14 00:10:38 db kernel: [49210.688300] [<ffffffff802ae075>]
__bread+0x5e/0x77
Mar 14 00:10:38 db kernel: [49210.688308] [<ffffffffa001df5c>]
:ext3:ext3_get_branch+0x67/0xd2
Mar 14 00:10:38 db kernel: [49210.688314] [<ffffffffa001e1ac>]
:ext3:ext3_get_blocks_handle+0x95/0x8bc
Mar 14 00:10:38 db kernel: [49210.688321] [<ffffffff8020a488>]
__switch_to+0x382/0x624
Mar 14 00:10:38 db kernel: [49210.688325] [<ffffffff8038f5b7>]
network_start_xmit+0x68f/0x714
Mar 14 00:10:38 db kernel: [49210.688329] [<ffffffff8030dc91>]
__next_cpu+0x19/0x26
Mar 14 00:10:38 db kernel: [49210.688333] [<ffffffff803d8093>]
__qdisc_run+0x121/0x1ef
Mar 14 00:10:38 db kernel: [49210.688339] [<ffffffffa001ec15>]
:ext3:ext3_get_block+0xba/0xf9
Mar 14 00:10:38 db kernel: [49210.688343] [<ffffffff802b3326>]
do_mpage_readpage+0x176/0x4b1
Mar 14 00:10:38 db kernel: [49210.688348] [<ffffffffa001eb5b>]
:ext3:ext3_get_block+0x0/0xf9
Mar 14 00:10:38 db kernel: [49210.688351] [<ffffffff80310d60>]
radix_tree_insert+0xcb/0x194
Mar 14 00:10:38 db kernel: [49210.688357] [<ffffffffa001eb5b>]
:ext3:ext3_get_block+0x0/0xf9
Mar 14 00:10:38 db kernel: [49210.688360] [<ffffffff802648e0>]
add_to_page_cache+0x7d/0xb4
Mar 14 00:10:38 db kernel: [49210.688366] [<ffffffffa001eb5b>]
:ext3:ext3_get_block+0x0/0xf9
Mar 14 00:10:38 db kernel: [49210.688369] [<ffffffff802b3830>]
mpage_readpages+0xa7/0xe7
Mar 14 00:10:38 db kernel: [49210.688374] [<ffffffffa001eb5b>]
:ext3:ext3_get_block+0x0/0xf9
Mar 14 00:10:38 db kernel: [49210.688377] [<ffffffff80269496>]
__alloc_pages_internal+0xd6/0x3b2
Mar 14 00:10:38 db kernel: [49210.688381] [<ffffffff8026b5e3>]
__do_page_cache_readahead+0xfa/0x18c
Mar 14 00:10:38 db kernel: [49210.688384] [<ffffffff8026b931>]
ondemand_readahead+0x17b/0x18d
Mar 14 00:10:38 db kernel: [49210.688387] [<ffffffff80265fb6>]
generic_file_aio_read+0x1d7/0x4b7
Mar 14 00:10:38 db kernel: [49210.688391] [<ffffffff8028a2b7>]
do_sync_read+0xc9/0x10c
Mar 14 00:10:38 db kernel: [49210.688394] [<ffffffff8020e7bc>]
get_nsec_offset+0x9/0x2c
Mar 14 00:10:38 db kernel: [49210.688397] [<ffffffff8023f4e5>]
autoremove_wake_function+0x0/0x2e
Mar 14 00:10:38 db kernel: [49210.688400] [<ffffffff804347c2>]
schedule+0x3e5/0x830
Mar 14 00:10:38 db kernel: [49210.688403] [<ffffffff8028aaa8>]
vfs_read+0xaa/0x152
Mar 14 00:10:38 db kernel: [49210.688405] [<ffffffff8028af70>]
sys_pread64+0x50/0x70
Mar 14 00:10:38 db kernel: [49210.688407] [<ffffffff8020b528>]
system_call+0x68/0x6d
Mar 14 00:10:38 db kernel: [49210.688409] [<ffffffff8020b4c0>]
system_call+0x0/0x6d
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