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

Zdenek Kabelac zkabelac at redhat.com
Mon Oct 22 10:54:41 UTC 2018

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.


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