• Dave Chinner's avatar
    vfs: increase shrinker batch size · 8ab47664
    Dave Chinner authored
    Now that the per-sb shrinker is responsible for shrinking 2 or more
    caches, increase the batch size to keep econmies of scale for
    shrinking each cache.  Increase the shrinker batch size to 1024
    objects.
    
    To allow for a large increase in batch size, add a conditional
    reschedule to prune_icache_sb() so that we don't hold the LRU spin
    lock for too long. This mirrors the behaviour of the
    __shrink_dcache_sb(), and allows us to increase the batch size
    without needing to worry about problems caused by long lock hold
    times.
    
    To ensure that filesystems using the per-sb shrinker callouts don't
    cause problems, document that the object freeing method must
    reschedule appropriately inside loops.
    Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    8ab47664
vfs.txt 46.8 KB