[dm-devel] Question about 'dmsetup remove' and dtr of target_type

[Reng Zeng]

Hi,

I suppose "dmsetup remove' will invoke dtr of target_type to remove the
device.

However, I use "dmsetup remove" hundreds times, as the debug info, but it
never enter the dtr function I defined.

Anybody have idea on this? Or how to dig into that to discover the reason?
Thanks.

To be of more details, I have cache_target as below.
static struct target_type cache_target = {
...
        .dtr    = cache_dtr,
...
};
I add debug info into cache_dtr, it show it never enter into cache_dtr when
I "dmsetup remove".

Thanks again,
Alan
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