• Dan Magenheimer's avatar
    xen: cleancache shim to Xen Transcendent Memory · 5bc20fc5
    Dan Magenheimer authored
    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.pdfSigned-off-by: default avatarDan Magenheimer <dan.magenheimer@oracle.com>
    Reviewed-by: default avatarJeremy 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>
    5bc20fc5
tmem.c 6.27 KB