staging: zcache: delete it

zcache is obsolete and not used anymore, Bob Liu has rewritten it and is
submitting it for inclusion through the main -mm tree, as it should have
been done in the first place...

Cc: Bob Liu <lliubbo@gmail.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Kyungmin Park <kmpark@infradead.org>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 59 deletions

diff --git a/drivers/staging/zcache/Kconfig b/drivers/staging/zcache/Kconfig
deleted file mode 100644
index 2d7b2da3b9e0..000000000000
--- a/drivers/staging/zcache/Kconfig
+++ /dev/null
@@ -1,59 +0,0 @@
-config ZCACHE
-	tristate "Dynamic compression of swap pages and clean pagecache pages"
-	depends on CRYPTO=y && SWAP=y && CLEANCACHE && FRONTSWAP
-	select CRYPTO_LZO
-	default n
-	help
-	  Zcache doubles RAM efficiency while providing a significant
-	  performance boosts on many workloads.  Zcache uses
-	  compression and an in-kernel implementation of transcendent
-	  memory to store clean page cache pages and swap in RAM,
-	  providing a noticeable reduction in disk I/O.
-
-config ZCACHE_DEBUG
-	bool "Enable debug statistics"
-	depends on DEBUG_FS && ZCACHE
-	default n
-	help
-	  This is used to provide an debugfs directory with counters of
-	  how zcache is doing. You probably want to set this to 'N'.
-
-config RAMSTER
-	tristate "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
-	depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE
-	depends on NET
-	# must ensure struct page is 8-byte aligned
-	select HAVE_ALIGNED_STRUCT_PAGE if !64BIT
-	default n
-	help
-	  RAMster allows RAM on other machines in a cluster to be utilized
-	  dynamically and symmetrically instead of swapping to a local swap
-	  disk, thus improving performance on memory-constrained workloads
-	  while minimizing total RAM across the cluster.  RAMster, like
-	  zcache2, compresses swap pages into local RAM, but then remotifies
-	  the compressed pages to another node in the RAMster cluster.
-
-config RAMSTER_DEBUG
-        bool "Enable ramster debug statistics"
-        depends on DEBUG_FS && RAMSTER
-        default n
-        help
-          This is used to provide an debugfs directory with counters of
-          how ramster is doing. You probably want to set this to 'N'.
-
-# Depends on not-yet-upstreamed mm patches to export end_swap_bio_write and
-# __add_to_swap_cache, and implement __swap_writepage (which is swap_writepage
-# without the frontswap call. When these are in-tree, the dependency on
-# BROKEN can be removed
-config ZCACHE_WRITEBACK
-	bool "Allow compressed swap pages to be writtenback to swap disk"
-	depends on ZCACHE=y && BROKEN
-	default n
-	help
-	  Zcache caches compressed swap pages (and other data) in RAM which
-	  often improves performance by avoiding I/O's due to swapping.
-	  In some workloads with very long-lived large processes, it can
-	  instead reduce performance.  Writeback decompresses zcache-compressed
-	  pages (in LRU order) when under memory pressure and writes them to
-	  the backing swap disk to ameliorate this problem.  Policy driving
-	  writeback is still under development.