• Andrew Morton's avatar
    [PATCH] swsusp: write speedup · ab954160
    Andrew Morton authored
    Switch the swsusp writeout code from 4k-at-a-time to 4MB-at-a-time.
    
    Crufty old PIII testbox:
    	12.9 MB/s -> 20.9 MB/s
    
    Sony Vaio:
    	14.7 MB/s -> 26.5 MB/s
    
    The implementation is crude.  A better one would use larger BIOs, but wouldn't
    gain any performance.
    
    The memcpys will be mostly pipelined with the IO and basically come for free.
    
    The ENOMEM path has not been tested.  It should be.
    
    Cc: Pavel Machek <pavel@ucw.cz>
    Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    ab954160
swap.c 14.8 KB