system slowdown - vnode related

[Masachika ISHIZUKA]

  Hi, David-san.
  I have still vnodes problem in 4.8-stable with /sys/kern/vfs_subr.c
1.249.2.30.

  310.locate of weekly cron make slow down or panic.  Values of sysctl
are shown as follows when they reached slow down.

(1) #1 machine (Celeron 466 with 256 mega byte rams)

  % sysctl kern.maxvnodes
  kern.maxvnodes: 17979
  % sysctl vm.zone | grep VNODE
  VNODE:           192,        0,  18004,    122,    18004

(2) #2 machine (Celeron 1300 with 512 mega byte rams)

  % sysctl kern.maxvnodes
  kern.maxvnodes: 36072
  % sysctl vm.zone | grep VNODE
  VNODE:           192,        0,  36097,     49,    36097

(3) #3 machine (Pentium III 600 with 512 mega rams)

  % sysctl kern.maxvnodes
  kern.maxvnodes: 36142
  % sysctl vm.zone | grep VNODE
  VNODE:           192,        0,  36167,     85,    36167

(4) #4 machine (Pentium III 750 with 512 mega byte rams)

  % sysctl kern.maxvnodes
  kern.maxvnodes: 36075
  % sysctl vm.zone | grep VNODE
  VNODE:           192,        0,  36100,     46,    36100

-- 
ishizuka at ish.org