fs/xfs/xfs_extent_busy.c

93  * Search for a busy extent within the range of the extent we are about to
94  * allocate.  You need to be holding the busy extent tree lock when calling
95  * xfs_extent_busy_search(). This function returns 0 for no overlapping busy
96  * extent, -1 for an overlapping but not exact busy extent, and 1 for an exact
138  * The found free extent [fbno, fend] overlaps part or all of the given busy
139  * extent.  If the overlap covers the beginning, the end, or all of the busy
141  * allocation.  We can't split a busy extent because we can't modify a
142  * transaction/CIL context busy list, but we can update an entry's block
175 	 * If there is a busy extent overlapping a user allocation, we have  in xfs_extent_busy_update_extent()
195 		 * We would have to split the busy extent to be able to track  in xfs_extent_busy_update_extent()
197 		 * modify the list of busy extents attached to the transaction  in xfs_extent_busy_update_extent()
200 		 * Force out the log to clear the busy extent and retry the  in xfs_extent_busy_update_extent()
233 		 * The busy extent is fully covered by the extent we are  in xfs_extent_busy_update_extent()
236 		 * tracking busy extents in the transaction or CIL context,  in xfs_extent_busy_update_extent()
239 		 * We also need to restart the busy extent search from the  in xfs_extent_busy_update_extent()
333  * For a given extent [fbno, flen], search the busy extent list to find a
334  * subset of the extent that is not busy.  If *rlen is smaller than
338  * Return the current busy generation for the AG if the extent is busy. This
339  * value can be used to wait for at least one of the currently busy extents
340  * to be cleared. Note that the busy list is not guaranteed to be empty after
470 			 * allocation;  if the segment is no longer busy at  in xfs_extent_busy_trim()
472 			 * even if it is still busy, we will get a forward  in xfs_extent_busy_trim()
552  * Remove all extents on the passed in list from the busy extents tree.
591  * Flush out all busy extents for this AG.
593  * If the current transaction is holding busy extents, the caller may not want
594  * to wait for committed busy extents to resolve. If we are being told just to
595  * try a flush or progress has been made since we last skipped a busy extent,
599  * in the transaction busy list and the log force won't resolve that situation.
601  * caller it needs to commit the busy extents it holds before retrying the
618 	/* Avoid deadlocks on uncommitted busy extents. */  in xfs_extent_busy_flush()
630 	/* Wait for committed busy extents to resolve. */  in xfs_extent_busy_flush()
662  * Callback for list_sort to sort busy extents by the AG they reside in.