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SubjectRe: [PATCH] ramzswap: Remove backing swap support
Nitin Gupta wrote:
> Currently, each ramzswap device can be assigned
> a separate 'backing swap' file/partition. The ramzswap
> driver forwards swap I/O requests to this backing swap
> whenever an incompressible page is found.
> This feature adds nearly 700 lines of code and it
> also duplicates much of the swapon() functionality
> (for example, finding swap extents and so on). Removing
> this code makes the driver much simpler and should
> help its transition from staging to stable drivers
> area (drivers/block/).
> Similar functionality may be implemented if we can
> implement migrating pages across swap devices but the
> details have not yet been worked out.
> Support for _partitions_ as backing swap could be
> retained as it requires a few lines of code only.
> This part can be re-introduced later if above swap
> migration method turns out to be infeasible.
> More cleanups and code comments will be added soon.
> Signed-off-by: Nitin Gupta <>

Acked-by: Pekka Enberg <>

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