• Steven Whitehouse's avatar
    GFS2: Allocate block for xattr at inode alloc time, if required · b2c8b3ea
    Steven Whitehouse authored
    This is another step towards improving the allocation of xattr
    blocks at inode allocation time. Here we take advantage of
    Christoph's recent work on ACLs to allocate a block for the
    xattrs early if we know that we will be adding ACLs to the
    inode later on. The advantage of that is that it is much
    more likely that we'll get a contiguous run of two blocks
    where the first is the inode and the second is the xattr block.
    We still have to fall back to the original system in case we
    don't get the requested two contiguous blocks, or in case the
    ACLs are too large to fit into the block.
    Future patches will move more of the ACL setting code further
    up the gfs2_inode_create() function. Also, I'd like to be
    able to do the same thing with the xattrs from LSMs in
    due course, too. That way we should be able to slowly reduce
    the number of independent transactions, at least in the
    most common cases.
    Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>