On Mon, Jul 22, 2013 at 02:15:36PM +0200, Zdenek Kabelac wrote:
> configure --with-thin=internal
>
> (and you will likely miss '--enable-udev_sync'
Thank you, it worked!
However, It seems that "discards" behavior for thin pool is not
supported on RHEL 6.4. Please confirm.
# ./configure --with-thin=internal --enable-debug
# make; make install
# lvcreate --discards passdown -L 1G -T thinvg1/thinlv1
Logical volume "thinlv1" created
# lvs -o +devices|grep -i thinlv1
thinlv1 thinvg1 twi-a-tz- 1.00g 0.00
thinlv1_tdata(0)
# dmesg
device-mapper: thin: Data device (dm-3) discard unsupported: Disabling
discard passdown.
<snip>
if (reason) {
DMWARN("Data device (%s) %s: Disabling discard
passdown.", bdevname(data_bdev, buf), reason);
pt->adjusted_pf.discard_passdown = false;
}
<snip>
Seems that we'll reach here if QUEUE_FLAG_DISCARD flag in the request
queue is not set.
!!amit
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