[Bug 272434] du and disk operations (like mv,cp,shutil.move/rmtree,os.rename) combination issues

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272434

--- Comment #4 from shamsher <meetshamsher@gmail.com> ---
root@freeBSD13_2:/data/infra # top

last pid:  3279;  load averages:  2.77,  2.29,  1.33                           
                                                              up 0+00:12:04 
12:32:42
22 processes:  4 running, 18 sleeping
CPU:  1.3% user,  0.0% nice, 74.7% system,  0.1% interrupt, 23.9% idle
Mem: 30M Active, 8620K Inact, 1760K Laundry, 48M Wired, 8660K Buf, 2428K Free
Swap: 723M Total, 128K Used, 723M Free

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    TIME    WCPU COMMAND
  794 root          1  95    0    22M  8692K RUN      0:43  56.98% python3.9
 3147 root          1 102    0    15M  4548K RUN      8:18  40.97% du
  786 root          1  20    0    21M  5812K RUN      0:00   0.00% sshd
  733 root          1  20    0    16M  1788K pause    0:00   0.00% csh
  789 root          1  20    0    16M  3172K pause    0:00   0.00% csh
  703 root          1  20    0    18M  4196K select   0:00   0.00% sendmail
 1640 root          1  21    0    18M  6968K wait     0:00   0.00% python3.9
  725 root          1  20    0    13M  8192B wait     0:00   0.00% <login>
  597 root          1  20    0    13M  2028K select   0:00   0.00% syslogd
  710 root          1  20    0    13M   648K nanslp   0:00   0.00% cron
  400 root          1  20    0    11M   672K select   0:00   0.00% devd
  785 root          1  20    0    21M  4644K select   0:00   0.00% sshd
 3274 root          1  20    0    13M  2076K ufs      0:00   0.00% ls
  732 root          1  52    0    13M  1612K ttyin    0:00   0.00% getty
  730 root          1  52    0    13M  1616K ttyin    0:00   0.00% getty
  729 root          1  52    0    13M  1624K ttyin    0:00   0.00% getty
  731 root          1  52    0    13M  1616K ttyin    0:00   0.00% getty
  728 root          1  52    0    13M  1612K ttyin    0:00   0.00% getty
  726 root          1  52    0    13M  1616K ttyin    0:00   0.00% getty
  727 root          1  52    0    13M  1616K ttyin    0:00   0.00% getty
  706 smmsp         1  52    0    18M  8192B pause    0:00   0.00% <sendmail>
 3279 root          1  20    0    14M  2604K RUN      0:00   0.00% top



root@freeBSD13_2:/data/infra # ps auxwww | grep 3147
root  3147 48.0  4.7 15368 4548  0  R    12:23   8:20.34 du /
root  3281  0.0  0.3   436  256  0  R+   12:32   0:00.00 grep 3147
root@freeBSD13_2:/data/infra # procstat kstack 3147
  PID    TID COMM                TDNAME              KSTACK                     
 3147 100116 du                  -                   mi_switch
intr_event_handle intr_execute_handlers Xapic_isr1 ffs_lock _vn_lock
vget_finish vfs_hash_get ffs_vgetf ufs_lookup_ino vfs_cache_lookup VOP_LOOKUP
cache_fplookup_noentry cache_fplookup namei kern_statat sys_fstatat
amd64_syscall 
root@freeBSD13_2:/data/infra # uname -a
FreeBSD freeBSD13_2.cs39 13.2-RELEASE FreeBSD 13.2-RELEASE
releng/13.2-n254617-525ecfdad597 GENERIC amd64
root@freeBSD13_2:/data/infra #

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