fs/xfs/xfs_discard.c

29  * discards on extents that might be in use, or are so recently in use they are
31  * gathering extents to trim, we must hold the AGF lock to lock out other
37  * couple of million free extents and issuing synchronous discards on each
55  * This is exactly how online discard works - free extents are marked busy when
80 	struct xfs_busy_extents	*extents =
83 	xfs_extent_busy_clear(extents->mount, &extents->extent_list, false);
84 	kfree(extents->owner);
95 	struct xfs_busy_extents	*extents = bio->bi_private;
97 	INIT_WORK(&extents->endio_work, xfs_discard_endio_work);
98 	queue_work(xfs_discard_wq, &extents->endio_work);
103  * Walk the discard list and issue discards on all the busy extents in the
105  * call to clear all the busy extents once the discards are complete.
110 	struct xfs_busy_extents	*extents)
118 	list_for_each_entry(busyp, &extents->extent_list, list) {
137 		bio->bi_private = extents;
141 		xfs_discard_endio_work(&extents->endio_work);
156 	struct xfs_busy_extents	*extents,
201 	 * Loop until we are done with all extents that are large
266 				&extents->extent_list);
276 		 * is no more extents to search.
283 	 * If there was an error, release all the gathered busy extents because
287 		xfs_extent_busy_clear(mp, &extents->extent_list, false);
302  * Iterate the free list gathering extents and discarding them. We need a cursor
321 		struct xfs_busy_extents	*extents;
323 		extents = kzalloc(sizeof(*extents), GFP_KERNEL);
324 		if (!extents) {
329 		extents->mount = pag->pag_mount;
330 		extents->owner = extents;
331 		INIT_LIST_HEAD(&extents->extent_list);
334 				&tcur, extents, blocks_trimmed);
336 			kfree(extents);
342 		 * discarded extents can be removed from the busy extent list.
344 		 * the next round of extents to discard.
350 		error = xfs_discard_extents(pag->pag_mount, extents);