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Subject[STACK] >3k call path in xfs
xfs is quite interesting.  No single function is particularly
stack-hungry, but the sheer depth of the call path adds up. Nathan,
can you see if some bytes can be saved here and there?

3k is not really bad yet, I just like to keep 1k of headroom for
surprises like an extra int foo[256] in a structure.

stackframes for call path too long (3064):
size function
144 xfs_ioctl
328 xfs_swapext
0 xfs_iaccess
16 xfs_acl_iaccess
104 xfs_attr_fetch
0 xfs_attr_node_get
28 xfs_da_node_lookup_int
68 xfs_dir2_leafn_lookup_int
0 xfs_da_read_buf
288 xfs_bmapi
52 xfs_rtpick_extent
24 xfs_trans_iget
32 xfs_iget
32 xfs_iread
72 xfs_itobp
60 xfs_imap
84 xfs_dilocate
0 xfs_inobt_lookup_le
16 xfs_inobt_increment
28 xfs_btree_readahead_core
20 xfs_btree_reada_bufl
12 pagebuf_readahead
16 pagebuf_get
0 pagebuf_iostart
0 xfs_bdstrat_cb
68 pagebuf_iorequest
0 pagebuf_iodone
0 pagebuf_iodone_work
0 pagebuf_rele
0 preempt_schedule
84 schedule
16 __put_task_struct
20 audit_free
36 audit_log_start
16 __kmalloc
0 __get_free_pages
28 __alloc_pages
284 try_to_free_pages
0 out_of_memory
0 mmput
16 exit_aio
0 __put_ioctx
16 do_munmap
0 split_vma
36 vma_adjust
0 fput
0 __fput
0 locks_remove_flock
12 panic
0 sys_sync
0 sync_inodes
308 sync_inodes_sb
0 do_writepages
128 mpage_writepages
4 write_boundary_block
0 ll_rw_block
28 submit_bh
0 bio_alloc
88 mempool_alloc
256 wakeup_bdflush
20 pdflush_operation
0 printk
16 release_console_sem
16 __wake_up
0 printk
0 vscnprintf
32 vsnprintf
112 number

Jörn

--
Ninety percent of everything is crap.
-- Sturgeon's Law
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