• C
    [PATCH] zoned vm counters: convert nr_mapped to per zone counter · 65ba55f5
    Christoph Lameter 提交于
    nr_mapped is important because it allows a determination of how many pages of
    a zone are not mapped, which would allow a more efficient means of determining
    when we need to reclaim memory in a zone.
    
    We take the nr_mapped field out of the page state structure and define a new
    per zone counter named NR_FILE_MAPPED (the anonymous pages will be split off
    from NR_MAPPED in the next patch).
    
    We replace the use of nr_mapped in various kernel locations.  This avoids the
    looping over all processors in try_to_free_pages(), writeback, reclaim (swap +
    zone reclaim).
    
    [akpm@osdl.org: bugfix]
    Signed-off-by: NChristoph Lameter <clameter@sgi.com>
    Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
    Signed-off-by: NAndrew Morton <akpm@osdl.org>
    Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
    65ba55f5
rmap.c 23.2 KB