fs/xfs/xfs_extent_busy.c

94  * Search for a busy extent within the range of the extent we are about to
95  * allocate.  You need to be holding the busy extent tree lock when calling
96  * xfs_extent_busy_search(). This function returns 0 for no overlapping busy
97  * extent, -1 for an overlapping but not exact busy extent, and 1 for an exact
139  * The found free extent [fbno, fend] overlaps part or all of the given busy
140  * extent.  If the overlap covers the beginning, the end, or all of the busy
142  * allocation.  We can't split a busy extent because we can't modify a
143  * transaction/CIL context busy list, but we can update an entry's block
176 	 * If there is a busy extent overlapping a user allocation, we have  in xfs_extent_busy_update_extent()
196 		 * We would have to split the busy extent to be able to track  in xfs_extent_busy_update_extent()
198 		 * modify the list of busy extents attached to the transaction  in xfs_extent_busy_update_extent()
201 		 * Force out the log to clear the busy extent and retry the  in xfs_extent_busy_update_extent()
234 		 * The busy extent is fully covered by the extent we are  in xfs_extent_busy_update_extent()
237 		 * tracking busy extents in the transaction or CIL context,  in xfs_extent_busy_update_extent()
240 		 * We also need to restart the busy extent search from the  in xfs_extent_busy_update_extent()
334  * For a given extent [fbno, flen], search the busy extent list to find a
335  * subset of the extent that is not busy.  If *rlen is smaller than
339  * Return the current busy generation for the AG if the extent is busy. This
340  * value can be used to wait for at least one of the currently busy extents
341  * to be cleared. Note that the busy list is not guaranteed to be empty after
471 			 * allocation;  if the segment is no longer busy at  in xfs_extent_busy_trim()
473 			 * even if it is still busy, we will get a forward  in xfs_extent_busy_trim()
544  * Remove all extents on the passed in list from the busy extents tree.
584  * Flush out all busy extents for this AG.
586  * If the current transaction is holding busy extents, the caller may not want
587  * to wait for committed busy extents to resolve. If we are being told just to
588  * try a flush or progress has been made since we last skipped a busy extent,
592  * in the transaction busy list and the log force won't resolve that situation.
594  * caller it needs to commit the busy extents it holds before retrying the
611 	/* Avoid deadlocks on uncommitted busy extents. */  in xfs_extent_busy_flush()
623 	/* Wait for committed busy extents to resolve. */  in xfs_extent_busy_flush()
655  * Callback for list_sort to sort busy extents by the AG they reside in.
675 /* Are there any busy extents in this AG? */