current state of the great stack overflow hunt

All we have from cfs is:

20 cfs_sync_inode
24 cfs_flush_list
40 cfs_flush_inode
44 cfs_async_handler_write
44 cfs_flush_one
48 cfs_file_flush
52 cfs_proc_write
92 cfsd_write

3 fois rien comme on dit en francais.  (3 times nothing (i.e. nothing) 
as we say in french).

The whole stack trace is:

do_IRQ: stack overflow: 328
 [<c01079ee>] dump_stack+0x1e/0x20
 [<c01094ae>] __overflow+0x1e/0x20
 [<c010946c>] do_IRQ+0xac/0xd0
 =======================
 [<c0107426>] common_interrupt+0x1a/0x20
 [<c014ed76>] enable_irq+0x46/0xe0
 [<d089c3cc>] ei_start_xmit+0x14c/0x2d0 [8390]
 [<c041973b>] qdisc_restart+0x6b/0x230
 [<c040779f>] dev_queue_xmit+0x24f/0x310
 [<c04289e3>] ip_finish_output+0x103/0x2d0
 [<c0429062>] ip_output+0x52/0x70
 [<c0429311>] ip_queue_xmit+0x291/0x5d0
 [<c043b249>] tcp_transmit_skb+0x3b9/0x770
 [<c043b713>] tcp_push_one+0x93/0x160
 [<c042f8e8>] tcp_sendmsg+0xd58/0x1160
 [<c04516f9>] inet_sendmsg+0x49/0x60
 [<c03fc41f>] sock_sendmsg+0xbf/0x100
 [<c03fc4a2>] kernel_sendmsg+0x42/0x50
 [<c03fffd1>] sock_no_sendpage+0x61/0x80
 [<c042eb37>] tcp_sendpage+0x47/0xa0
 [<d08f0736>] _drbd_send_page+0x106/0x180 [drbd]
 [<d08f0a80>] drbd_send_dblock+0x2d0/0x3f0 [drbd]
 [<d08ea663>] drbd_make_request_common+0x7b3/0x940 [drbd]
 [<d08ea8dd>] drbd_make_request_26+0xed/0x2c0 [drbd]
 [<c038847a>] generic_make_request+0xca/0x270
 [<c0388679>] submit_bio+0x59/0xf0
 [<c0175a5a>] submit_bh+0x13a/0x190
 [<c0175ba9>] sync_dirty_buffer+0x49/0xf0
 [<d091e58d>] journal_update_superblock+0xbd/0xf0 [jbd]
 [<d091bf91>] cleanup_journal_tail+0xb1/0x150 [jbd]
 [<d091bcdf>] log_do_checkpoint+0x1f/0x220 [jbd]
 [<d091b8b1>] __log_wait_for_space+0xc1/0xf0 [jbd]
 [<d09171d6>] start_this_handle+0x116/0x3b0 [jbd]
 [<d0917568>] journal_start+0xa8/0xd0 [jbd]
 [<d095f935>] ext3_journal_start_sb+0x55/0x60 [ext3]
 [<d0958142>] ext3_prepare_write+0xf2/0x1a0 [ext3]
 [<c0152452>] generic_file_buffered_write+0x202/0x720
 [<c0152c4b>] __generic_file_aio_write_nolock+0x2db/0x510
 [<c0152fc0>] __generic_file_write_nolock+0x90/0xb0
 [<c0153370>] generic_file_writev+0x50/0xe0
 [<c02d9c20>] cfsd_write+0x230/0x290
 [<c02d411f>] cfs_proc_write+0x26f/0x330
 [<c02cfe98>] cfs_async_handler_write+0x58/0x200
 [<c02d0242>] cfs_flush_one+0x172/0x250
 [<c02d0371>] cfs_flush_list+0x51/0xb0
 [<c02d0948>] cfs_flush_inode+0x88/0xc0
 [<c02d0a69>] cfs_sync_inode+0x59/0x90
 [<c02cd1e6>] cfs_file_flush+0x96/0x100
 [<c017023d>] filp_close+0x6d/0x90
 [<c01702cb>] sys_close+0x6b/0x90
 [<c0106997>] sysenter_past_esp+0x54/0x75
Back from overflow



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