xfs: use bios directly to write log buffers

Browse source

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 <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: don't split if/else with an #endif]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

...

This commit is contained in:

Christoph Hellwig 2019-06-28 19:27:25 -07:00 • committed by Darrick J. Wong

parent 2d15d2c0e0

commit 79b54d9bfc

2 changed files with 118 additions and 130 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

230

fs/xfs/xfs_log.c

View file

18

fs/xfs/xfs_log_priv.h

View file