4 Commits

Author	SHA1	Message	Date
Chris Mason	f2183bde1a	Btrfs: Add BH_Defrag to mark buffers that are in need of defragging ... This allows the tree walking code to defrag only the newly allocated buffers, it seems to be a good balance between perfect defragging and the performance hit of repeatedly reallocating blocks. Signed-off-by: Chris Mason <chris.mason@oracle.com>	2007-08-10 14:42:37 -04:00
Chris Mason	e9d0b13b5b	Btrfs: Btree defrag on the extent-mapping tree as well ... Signed-off-by: Chris Mason <chris.mason@oracle.com>	2007-08-10 14:06:19 -04:00
Chris Mason	409eb95d7f	Btrfs: Further reduce the concurrency penalty of defrag and drop_snapshot ... Signed-off-by: Chris Mason <chris.mason@oracle.com>	2007-08-08 20:17:12 -04:00
Chris Mason	6702ed490c	Btrfs: Add run time btree defrag, and an ioctl to force btree defrag ... This adds two types of btree defrag, a run time form that tries to defrag recently allocated blocks in the btree when they are still in ram, and an ioctl that forces defrag of all btree blocks. File data blocks are not defragged yet, but this can make a huge difference in sequential btree reads. Signed-off-by: Chris Mason <chris.mason@oracle.com>	2007-08-07 16:15:09 -04:00