[linux-mm-cc] [RFC PATCH] WKdm workset pre-alloc

[Anderson Briglia]

Hi all,

This patch is just a hack regarding the first activity for CCache ToDo list[1]: 1) Enhance current static compressed
caching code - Critical vulnerability.

This patch allocates, at ccache initialization, the memory used for WKdm compression algo working area. guess_algo
function must be disabled and just WKdm algo must be used.

At previous tests the CCache behavior was the same as before. Main challenge to test it is to find conditions that
decompression path fails due memory allocation error.

One problem encountered is how pass (copy) a decompressed page to the system and still grant that a new buffer page can
be allocated.

Best regards,

Anderson Briglia
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