5bc20fc597
xen: cleancache shim to Xen Transcendent Memory
...
This patch provides a shim between the kernel-internal cleancache
API (see Documentation/mm/cleancache.txt) and the Xen Transcendent
Memory ABI (see http://oss.oracle.com/projects/tmem ).
Xen tmem provides "hypervisor RAM" as an ephemeral page-oriented
pseudo-RAM store for cleancache pages, shared cleancache pages,
and frontswap pages. Tmem provides enterprise-quality concurrency,
full save/restore and live migration support, compression
and deduplication.
A presentation showing up to 8% faster performance and up to 52%
reduction in sectors read on a kernel compile workload, despite
aggressive in-kernel page reclamation ("self-ballooning") can be
found at:
http://oss.oracle.com/projects/tmem/dist/documentation/presentations/TranscendentMemoryXenSummit2010.pdf
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com >
Reviewed-by: Jeremy Fitzhardinge <jeremy@goop.org >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Matthew Wilcox <matthew@wil.cx >
Cc: Nick Piggin <npiggin@kernel.dk >
Cc: Mel Gorman <mel@csn.ul.ie >
Cc: Rik Van Riel <riel@redhat.com >
Cc: Jan Beulich <JBeulich@novell.com >
Cc: Chris Mason <chris.mason@oracle.com >
Cc: Andreas Dilger <adilger@sun.com >
Cc: Ted Ts'o <tytso@mit.edu >
Cc: Mark Fasheh <mfasheh@suse.com >
Cc: Joel Becker <joel.becker@oracle.com >
Cc: Nitin Gupta <ngupta@vflare.org >
2011-05-26 10:02:21 -06:00
