TAKE - more memory allocation cleanup

[Steve Lord <lord@sgi.com>]

remove KM_SLEEP_IO flag. This was a previous attempt at determining
which flags to use on memory allocations, it turns out it was getting
in the way of the new code and actually slowing things down. This was
worth about 10% on a particular dbench setup.

Date:  Tue Feb  5 13:52:14 PST 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-linux.back

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:111101a
linux/fs/xfs/xfs_da_btree.c - 1.121
linux/fs/xfs/xfs_vfsops.c - 1.333
linux/fs/xfs/xfs_iget.c - 1.150
linux/fs/xfs/xfs_mount.c - 1.267
linux/fs/xfs/xfs_inode.c - 1.325
linux/fs/xfs/xfs_dir2_leaf.c - 1.24
linux/fs/xfs/xfs_trans.c - 1.128
linux/fs/xfs_support/kmem.c - 1.21
linux/include/linux/xfs_support/kmem.h - 1.2