On discards,
I have a thin pool that filled up when there was enough space, because
the filesystem hadn't issued discards.
I have ext4 mounted with the discard option, I hope, because it is in
the list of default mount options of tune2fs:
Default mount options: user_xattr acl discard
What can I do to ensure that it won't happen again?
Is the filesystem really mounted with discard?
It doesn't say so anywhere.
Regards.
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