[linux-lvm] thin pool and discards

[Vasiliy Tolstov]

Hello. I'm try to check that discard are working. I have thin volume
1031 (used by virtual machine)
I'm fill the disc and delete data, (fs ext4 with discard option) after
that i manually run fstrim -v /
but data on thin volume not reclaimed.

  LV      VG   Attr       LSize   Pool Origin Data%  Move Log Cpy%Sync Convert
  tp0     vg0  twi-a-tz-- 445.00g               0.00
  373_153 vg1  Vwi---tz-k  20.00g tp1
  375_151 vg1  Vwi---tz-k  40.00g tp1
  529_217 vg1  Vwi---tz-k  40.00g tp1
  531_221 vg1  Vwi---tz-k  20.00g tp1
  533_219 vg1  Vwi---tz-k  40.00g tp1
  577_305 vg1  Vwi---tz-k  40.00g tp1
  581_309 vg1  Vwi---tz-k  40.00g tp1
  583_307 vg1  Vwi---tz-k  20.00g tp1
  tp1     vg1  twi-a-tz-- 445.00g               0.50
  377_159 vg2  Vwi---tz-k  20.00g tp2
  445_197 vg2  Vwi---tz-k  20.00g tp2
  tp2     vg2  twi-a-tz-- 445.00g               0.25
  1031    vg3  Vwi-aotz--  20.00g tp3          56.23
  tp3     vg3  twi-a-tz-- 445.00g               2.53
  tp4     vg4  twi-a-tz-- 445.00g               0.00
  111     vg5  Vwi-aotz--  20.00g tp5           5.63
  111_23  vg5  Vwi---tz-k  20.00g tp5  111
  111_71  vg5  Vwi---tz-k  20.00g tp5  111
  13      vg5  Vwi-aotz--  30.00g tp5           4.70
  17      vg5  Vwi-aotz--  20.00g tp5          25.58
  29      vg5  Vwi-a-tz--  20.00g tp5           0.00
  31      vg5  Vwi-a-tz--  20.00g tp5           0.00
  33      vg5  Vwi-a-tz--  20.00g tp5           0.00
  35      vg5  Vwi-a-tz--  20.00g tp5           0.00
  75      vg5  Vwi-aotz--  20.00g tp5          25.58
  tp5     vg5  twi-a-tz-- 445.00g               2.92

lvm - 2.02.106
kernel 3.10

-- 
Vasiliy Tolstov,
e-mail: v.tolstov at selfip.ru
jabber: vase at selfip.ru