xfs: use bios directly to write log buffers

Currently the XFS logging code uses the xfs_buf structure and
associated APIs to write the log buffers to disk.  This requires
various special cases in the log code and is generally not very
optimal.

Instead of using a buffer just allocate a kmem_alloc_larger region for
each log buffer, and use a bio and bio_vec array embedded in the iclog
structure to write the buffer to disk.  This also allows for using
the bio split and chaining case to deal with the case of a log
buffer wrapping around the end of the log.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Darrick J. Wong <[email protected]>
[darrick: don't split if/else with an #endif]
Signed-off-by: Darrick J. Wong <[email protected]>

0 files changed, 0 insertions, 0 deletions