• Dave Chinner's avatar
    dentry: move to per-sb LRU locks · 19156840
    Dave Chinner authored
    With the dentry LRUs being per-sb structures, there is no real need for
    a global dentry_lru_lock. The locking can be made more fine-grained by
    moving to a per-sb LRU lock, isolating the LRU operations of different
    filesytsems completely from each other. The need for this is independent
    of any performance consideration that may arise: in the interest of
    abstracting the lru operations away, it is mandatory that each lru works
    around its own lock instead of a global lock for all of them.
    
    [glommer@openvz.org: updated changelog ]
    Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
    Signed-off-by: default avatarGlauber Costa <glommer@openvz.org>
    Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
    Acked-by: default avatarMel Gorman <mgorman@suse.de>
    Cc: "Theodore Ts'o" <tytso@mit.edu>
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Al Viro <viro@zeniv.linux.org.uk>
    Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
    Cc: Arve Hjønnevåg <arve@android.com>
    Cc: Carlos Maiolino <cmaiolino@redhat.com>
    Cc: Christoph Hellwig <hch@lst.de>
    Cc: Chuck Lever <chuck.lever@oracle.com>
    Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
    Cc: David Rientjes <rientjes@google.com>
    Cc: Gleb Natapov <gleb@redhat.com>
    Cc: Greg Thelen <gthelen@google.com>
    Cc: J. Bruce Fields <bfields@redhat.com>
    Cc: Jan Kara <jack@suse.cz>
    Cc: Jerome Glisse <jglisse@redhat.com>
    Cc: John Stultz <john.stultz@linaro.org>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Cc: Kent Overstreet <koverstreet@google.com>
    Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    Cc: Marcelo Tosatti <mtosatti@redhat.com>
    Cc: Mel Gorman <mgorman@suse.de>
    Cc: Steven Whitehouse <swhiteho@redhat.com>
    Cc: Thomas Hellstrom <thellstrom@vmware.com>
    Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    19156840
dcache.c 83.3 KB