• Steven Whitehouse's avatar
    GFS2: Clean up log write code path · e8c92ed7
    Steven Whitehouse authored
    Prior to this patch, we have two ways of sending i/o to the log.
    One of those is used when we need to allocate both the data
    to be written itself and also a buffer head to submit it. This
    is done via sb_getblk and friends. This is used mostly for writing
    log headers.
    
    The other method is used when writing blocks which have some
    in-place counterpart. This is the case for all the metadata
    blocks which are journalled, and when journaled data is in use,
    for unescaped journalled data blocks.
    
    This patch replaces both of those two methods, and about half
    a dozen separate i/o submission points with a single i/o
    submission function. We also go direct to bio rather than
    using buffer heads, since this allows us to build i/o
    requests of the maximum size for the block device in
    question. It also reduces the memory required for flushing
    the log, which can be very useful in low memory situations.
    Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
    e8c92ed7
util.h 5.06 KB