rm: page allocation failure. order:5, mode:0x50
 [<c013f160>] __alloc_pages+0x1b0/0x360
 [<c013f335>] __get_free_pages+0x25/0x40
 [<c0142891>] kmem_getpages+0x21/0xd0
 [<c01435ab>] cache_grow+0xab/0x150
 [<c01437c6>] cache_alloc_refill+0x176/0x240
 [<c0143b68>] __kmalloc+0x88/0x90
 [<e0ab4659>] kmem_alloc+0x59/0xd0 [xfs]
 [<e0a8f7ff>] xfs_iread_extents+0x4f/0x110 [xfs]
 [<e0a69120>] xfs_bunmapi+0x1000/0x10a0 [xfs]
 [<e0aa6fdc>] xfs_trans_unreserve_and_mod_sb+0x17c/0x180 [xfs]
 [<e0ab85ce>] pagebuf_delwri_queue+0x6e/0xa0 [xfs]
 [<c01c18d7>] _atomic_dec_and_lock+0x27/0x50
 [<e0aa79fd>] xfs_trans_tail_ail+0x3d/0x60 [xfs]
 [<e0a98709>] xlog_assign_tail_lsn+0x49/0x80 [xfs]
 [<e0aa932b>] xfs_trans_unlock_items+0x5b/0xe0 [xfs]
 [<e0a9a4af>] xlog_grant_log_space+0x3af/0x3e0 [xfs]
 [<e0aa8ecd>] xfs_trans_log_inode+0x2d/0x60 [xfs]
 [<e0a901a1>] xfs_itruncate_finish+0x1f1/0x460 [xfs]
 [<e0aaefa1>] xfs_inactive+0x511/0x570 [xfs]
 [<e0abff63>] vn_rele+0xc3/0xd0 [xfs]
 [<e0abe528>] linvfs_clear_inode+0x18/0x30 [xfs]
 [<c017335e>] clear_inode+0xde/0x120
 [<c0174256>] generic_delete_inode+0x116/0x140
 [<c01c18d7>] _atomic_dec_and_lock+0x27/0x50
 [<c0174432>] iput+0x62/0x90
 [<c0169f96>] sys_unlink+0xd6/0x120
 [<c016c61f>] sys_ioctl+0xaf/0x250
 [<c01031cf>] syscall_call+0x7/0xb