• Joe Thornber's avatar
    dm cache: significant rework to leverage dm-bio-prison-v2 · b29d4986
    Joe Thornber authored
    The cache policy interfaces have been updated to work well with the new
    bio-prison v2 interface's ability to queue work immediately (promotion,
    demotion, etc) -- overriding benefit being reduced latency on processing
    IO through the cache.  Previously such work would be left for the DM
    cache core to queue on various lists and then process in batches later
    -- this caused a serious delay in latency for IO driven by the cache.
    The background tracker code was factored out so that all cache policies
    can make use of it.
    Also, the "cleaner" policy has been removed and is now a variant of the
    smq policy that simply disallows migrations.
    Signed-off-by: default avatarJoe Thornber <ejt@redhat.com>
    Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
dm-cache-policy-internal.h 4.36 KB