[linux-lvm] Why doesn't the lvmcache support the discard (trim) command?

[Zdenek Kabelac]

Dne 19. 10. 18 v 19:00 Ilia Zykov napsal(a):
>>
>> dm-writecache could be seen as 'extension' of your page-cache to held
>> longer list of dirty-pages...
>>
>> Zdenek
>>
> 
> Does it mean that the dm-writecache is always empty, after reboot?
> Thanks.
> 

No, writecache is journaled -  so after reboot used content is remembered and 
read for use.


Zdenek