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Bug#789094: enable CONFIG_ZBUD again like in 3.16



Control: reassign -1 src:linux 4.0.2-1

On Wed, 2015-06-17 at 21:53 +0200, Kai Lüke wrote:
> Package: linux-image-4.0.0-1-amd64
> Version: 4.0.2-1
> 
> Hello,
> 
> when switching from 3.16 to 4.0 with kernel command line zswap.enabled=1
> the following messages are printed and zswap is not working.
> 
> [    0.898384] zpool: loaded
> [    0.930753] zswap: loading zswap
> [    0.930755] zpool: creating pool type zbud
> [    0.932435] zpool: no driver for type zbud
> [    0.932508] zswap: zbud zpool not available
> [    0.932567] zswap: zpool creation failed
> 
> zbud is the default memory allocation backend used in zswap. In 3.16
> CONFIG_ZBUD was enabled but in 4.0 it is not. I could not find a note on
> this in the changelog and am so asking whether it can be enabled again.

This was not intentional.  CONFIG_ZBUD used to be automatically enabled
along with CONFIG_ZSMALLOC, but now we need to explicitly enable it.

Ben.

-- 
Ben Hutchings
You can't have everything.  Where would you put it?

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