High CPU load when write use samba 4.3.11

[Zhangxiaoxu]

Hi samba-team,

High CPU load when write use samba 4.3.11.

Top command:
    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
464708 nobody    20   0 2543720 2.041g  22028 R  91.2  2.2  73:56.20 smbd
In another server, it cost about 40% when write the same files.

A lot of logs was printed during write:
[2017/03/21 19:57:53.532109,  1] ../librpc/ndr/ndr.c:578(ndr_pull_error)
  ndr_pull_error(11): Pull bytes 8 (../librpc/ndr/ndr_basic.c:234)
[2017/03/21 19:57:53.532161,  1] ../source3/locking/share_mode_lock.c:312(parse_share_modes)
  ndr_pull_share_mode_lock failed: Buffer Size Error

Configuration:
usershare allow guests = yes
clustering = yes
max protocol = SMB3
large readwrite = yes
aio write behind = true
load printers = no

Could you give us some help about the issue.
Thanks.

Br
Zhang Xiaoxu.

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