• Mikulas Patocka's avatar
    dm io: use fixed initial mempool size · bda8efec
    Mikulas Patocka authored
    Replace the arbitrary calculation of an initial io struct mempool size
    with a constant.
    
    The code calculated the number of reserved structures based on the request
    size and used a "magic" multiplication constant of 4.  This patch changes
    it to reserve a fixed number - itself still chosen quite arbitrarily.
    Further testing might show if there is a better number to choose.
    
    Note that if there is no memory pressure, we can still allocate an
    arbitrary number of "struct io" structures.  One structure is enough to
    process the whole request.
    Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
    Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
    bda8efec
dm-io.h 1.92 KB