Bug#677273: [experimental] zram doesn't work because it's missing zcache

[Jonathan Nieder <jrnieder@gmail.com>]

tags 677273 + moreinfo
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Hi Christian,

Christian Ohm wrote:

> Trying to modprobe the zram module, the following happens:
>
> # modprobe zram
> ERROR: could not insert 'zram': Unknown symbol in module, or unknown parameter (see dmesg)
>
> # dmesg
> [310034.551024] zsmalloc: module is from the staging directory, the quality is unknown, you have been warned.
> [310034.551037] zsmalloc: module license 'unspecified' taints kernel.
> [310034.551043] Disabling lock debugging due to kernel taint
> [310034.551393] zsmalloc: Unknown symbol alloc_vm_area (err 0)

A quick Google search indicates that you're the only one. :)

What indicates that missing zcache is the cause?

[...]
> ** Tainted: PC (1025)
>  * Proprietary module has been loaded.

Can you reproduce this without said proprietary module (for example by
blacklisting it in /etc/modprobe.d)?

Thanks,
Jonathan