From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 09 Oct 2014 16:19:59 +0200
From: Zdenek Kabelac <zkabelac@redhat.com>
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Subject: Re: [linux-lvm] thin pool and discards
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To: LVM general discussion and development <linux-lvm@redhat.com>, Vasiliy Tolstov <v.tolstov@selfip.ru>
Cc: Mike Snitzer <snitzer@redhat.com>

Dne 9.10.2014 v 15:19 Vasiliy Tolstov napsal(a):
> 2014-10-09 2:44 GMT+04:00 Vasiliy Tolstov <v.tolstov@selfip.ru>:
>> Thanks! Rhel kernel works fine for me. Does it possible to send needed
>> patches to stable for all other users ?=) As i see this commit does
>> not in 3.10 stable now.
>
>
> AS i see i have another issue. I don't know how created some thinp
> volumes, but on some of them i'm able to get back space after discard,
> but on some not. How can i debug this ?
>

Please mention which kernel do you use - there have been patches
related to discard on thin volumes (pretty resent - kernel 3.14 I think).

If you use old stable 3.10  from vanilla kernel it simply cannot be compared 
with 3.10  RHEL kernel -  they are very different (RHEL has ton of stuff 
backported even from the latest kernels)

So - please try first with upstream to see if you problem is not already fixed.


Zdenek