[<0>] balance_dirty_pages+0x426/0xcd0
[<0>] balance_dirty_pages_ratelimited+0x2af/0x3b0
[<0>] generic_perform_write+0x16a/0x1b0
[<0>] __generic_file_write_iter+0xfa/0x1c0
[<0>] vvp_io_write_start+0x50b/0xbd0 [lustre]
[<0>] cl_io_start+0x59/0x110 [obdclass]
[<0>] cl_io_loop+0x9a/0x1f0 [obdclass]
[<0>] ll_file_io_generic+0x4dc/0xd40 [lustre]
[<0>] ll_file_write_iter+0x62a/0x860 [lustre]
[<0>] new_sync_write+0x124/0x170
[<0>] vfs_write+0xa5/0x1a0
[<0>] ksys_write+0x4f/0xb0
[<0>] do_syscall_64+0x5b/0x1b0
[<0>] entry_SYSCALL_64_after_hwfr
echo 10 > /proc/sys/vm/dirty_background_ratio
echo 40 > /proc/sys/vm/dirty_ratio
