Darrick J. Wong 84d6961910 xfs: preallocate blocks for worst-case btree expansion ... To gracefully handle the situation where a CoW operation turns a single refcount extent into a lot of tiny ones and then run out of space when a tree split has to happen, use the per-AG reserved block pool to pre-allocate all the space we'll ever need for a maximal btree. For a 4K block size, this only costs an overhead of 0.3% of available disk space. When reflink is enabled, we have an unfortunate problem with rmap -- since we can share a block billions of times, this means that the reverse mapping btree can expand basically infinitely. When an AG is so full that there are no free blocks with which to expand the rmapbt, the filesystem will shut down hard. This is rather annoying to the user, so use the AG reservation code to reserve a "reasonable" amount of space for rmap. We'll prevent reflinks and CoW operations if we think we're getting close to exhausting an AG's free space rather than shutting down, but this permanent reservation should be enough for "most" users. Hopefully. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> [hch@lst.de: ensure that we invalidate the freed btree buffer] Signed-off-by: Christoph Hellwig <hch@lst.de>		2016-10-05 16:26:27 -07:00
..
xfs_ag_resv.c	xfs: preallocate blocks for worst-case btree expansion	2016-10-05 16:26:27 -07:00
xfs_ag_resv.h	xfs: set up per-AG free space reservations	2016-09-19 10:30:52 +10:00
xfs_alloc_btree.c	xfs: remove the get*keys and update_keys btree ops pointers	2016-08-03 12:22:12 +10:00
xfs_alloc_btree.h
xfs_alloc.c	xfs: reserve AG space for the refcount btree root	2016-10-03 09:11:24 -07:00
xfs_alloc.h	Merge branch 'xfs-4.9-log-recovery-fixes' into for-next	2016-10-03 09:56:28 +11:00
xfs_attr_leaf.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_attr_leaf.h	xfs: make several functions static	2016-06-01 17:38:15 +10:00
xfs_attr_remote.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_attr_remote.h
xfs_attr_sf.h	xfs: move struct xfs_attr_shortform to xfs_da_format.h	2016-02-08 15:00:01 +11:00
xfs_attr.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_bit.c	libxfs: Optimize the loop for xfs_bitmap_empty	2016-01-04 16:10:19 +11:00
xfs_bit.h
xfs_bmap_btree.c	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_bmap_btree.h
xfs_bmap.c	xfs: create a separate cow extent size hint for the allocator	2016-10-05 16:26:26 -07:00
xfs_bmap.h	xfs: support removing extents from CoW fork	2016-10-05 13:55:40 -07:00
xfs_btree.c	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_btree.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_cksum.h
xfs_da_btree.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_da_btree.h	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_da_format.c	xfs: kill xfs_dir2_inou_t	2016-07-20 11:48:31 +10:00
xfs_da_format.h	xfs: fix attr shortform structure alignment on cris	2016-08-03 10:59:42 +10:00
xfs_defer.c	xfs: defer should allow ->finish_item to request a new transaction	2016-09-19 10:26:25 +10:00
xfs_defer.h	xfs: implement deferred bmbt map/unmap operations	2016-10-04 11:05:44 -07:00
xfs_dir2_block.c	xfs: print name of verifier if it fails	2016-01-04 16:10:19 +11:00
xfs_dir2_data.c	xfs: print name of verifier if it fails	2016-01-04 16:10:19 +11:00
xfs_dir2_leaf.c	xfs: print name of verifier if it fails	2016-01-04 16:10:19 +11:00
xfs_dir2_node.c	xfs: always set rvalp in xfs_dir2_node_trim_free	2016-03-15 11:44:18 +11:00
xfs_dir2_priv.h	xfs: move type conversion functions to xfs_dir.h	2014-12-04 09:43:17 +11:00
xfs_dir2_sf.c	xfs: kill xfs_dir2_inou_t	2016-07-20 11:48:31 +10:00
xfs_dir2.c	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_dir2.h	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_dquot_buf.c	xfs: handle dquot buffer readahead in log recovery correctly	2016-01-12 07:04:01 +11:00
xfs_format.h	xfs: create a separate cow extent size hint for the allocator	2016-10-05 16:26:26 -07:00
xfs_fs.h	xfs: create a separate cow extent size hint for the allocator	2016-10-05 16:26:26 -07:00
xfs_ialloc_btree.c	xfs: set up per-AG free space reservations	2016-09-19 10:30:52 +10:00
xfs_ialloc_btree.h	xfs: allocate sparse inode chunks on full chunk allocation failure	2015-05-29 09:18:32 +10:00
xfs_ialloc.c	xfs: add owner field to extent allocation and freeing	2016-08-03 11:33:42 +10:00
xfs_ialloc.h	xfs: rename flist/free_list to dfops	2016-08-03 11:19:29 +10:00
xfs_inode_buf.c	xfs: create a separate cow extent size hint for the allocator	2016-10-05 16:26:26 -07:00
xfs_inode_buf.h	xfs: create a separate cow extent size hint for the allocator	2016-10-05 16:26:26 -07:00
xfs_inode_fork.c	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_inode_fork.h	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_log_format.h	xfs: create a separate cow extent size hint for the allocator	2016-10-05 16:26:26 -07:00
xfs_log_recover.h	xfs: support a crc verification only log record pass	2016-01-04 15:55:10 +11:00
xfs_log_rlimit.c	xfs: move most of xfs_sb.h to xfs_format.h	2014-11-28 14:27:09 +11:00
xfs_quota_defs.h	xfs: wire up Q_XGETNEXTQUOTA / get_nextdqblk	2016-02-08 11:27:38 +11:00
xfs_refcount_btree.c	xfs: preallocate blocks for worst-case btree expansion	2016-10-05 16:26:27 -07:00
xfs_refcount_btree.h	xfs: preallocate blocks for worst-case btree expansion	2016-10-05 16:26:27 -07:00
xfs_refcount.c	xfs: store in-progress CoW allocations in the refcount btree	2016-10-05 16:26:05 -07:00
xfs_refcount.h	xfs: store in-progress CoW allocations in the refcount btree	2016-10-05 16:26:05 -07:00
xfs_rmap_btree.c	xfs: preallocate blocks for worst-case btree expansion	2016-10-05 16:26:27 -07:00
xfs_rmap_btree.h	xfs: preallocate blocks for worst-case btree expansion	2016-10-05 16:26:27 -07:00
xfs_rmap.c	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00
xfs_rmap.h	xfs: propagate bmap updates to rmapbt	2016-08-03 12:16:05 +10:00
xfs_rtbitmap.c	xfs: make several functions static	2016-06-01 17:38:15 +10:00
xfs_sb.c	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_sb.h	xfs: remove unused function definitions	2016-02-08 14:58:07 +11:00
xfs_shared.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_symlink_remote.c	xfs: print name of verifier if it fails	2016-01-04 16:10:19 +11:00
xfs_trans_resv.c	xfs: account for the refcount btree in the alloc/free log reservation	2016-10-03 09:11:19 -07:00
xfs_trans_resv.h	xfs: define the on-disk refcount btree format	2016-10-03 09:11:18 -07:00
xfs_trans_space.h	xfs: clean up XFS_MIN_FREELIST macros	2015-06-22 10:13:30 +10:00
xfs_types.h	xfs: introduce the CoW fork	2016-10-04 18:06:40 -07:00