Re: libcryptsetup kernel feature detection fails on boot

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On 07/23/2014 09:45 AM, Milan Broz wrote:
> On 23.7.2014 0:36, Thomas Bächler wrote:
>> Since cryptsetup 1.6.5, libcryptsetup fails to detect the kernel's
>> features on boot. In particular, whenever the dm-crypt module is not
>> loaded before configuring a mapping with libcryptsetup, the
>> allow_discards option is not used.
> 
> Hm, yes, that's possible... dmcrypt is now needed only on activation
> (previaously it was loaded earlier perhaps).
> 
> Well, the workaround for now is probably to always load dmcrypt module,
> I'll try to fix it soon.

It is fixed in devel git now. Thanks.

(The main problem with detection of features is that without device-mapper
target module loaded there is no way to get the version. And using only
kernel version is not enough, e.g. RHEL systems often backports features.)

Milan
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