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Vlad Apostolov b93bd20cd5 [XFS] do not have XFSMNT_IDELETE as default when mounted with XFSMNT_DMAPI 
XFS inodes are dynamically allocated on demand, rather than being
allocated at mkfs time. Chunks of 64 inodes are allocated at once, but
they are never freed. Over time, this can lead to filesystem
fragmentation, clusters of inodes and the btrees which point at them can
be scattered around the system.

By freeing clusters as they are emptied, we will reduce fragmentation of
the free space after removing files. This in turn will allow us to make
better placement decisions when repopulating a filesystem. The
XFSMNT_IDELETE mount option enables freeing clusters when they get empty.

Unfortunately a side effect of freeing inode clusters is that the inode
generation numbers of such inodes would be reset to zero when the cluster
is reclaimed. This is a problem in particular for a DMAPI enabled
filesystem as the the DMAPI handles need to be unique and persistent in
time. An unique DMAPI handle is built with the help of the inode
generation number. When the last one is prematurely reset by an inode
cluster reclaim, there is a high probability of different generation
inodes to end up having identical DMAPI handles.

To avoid the problem with identical DMAPI handles, the XFSMNT_IDELETE
mount option should be set as default, only if the filesystem is not
mounted with XFSMNT_DMAPI.

SGI-PV: 969192
SGI-Modid: xfs-linux-melb:xfs-kern:29486a

Signed-off-by: Vlad Apostolov <vapo@sgi.com>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Mark Goodwin <markgw@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-10-15 16:53:36 +10:00
..
linux-2.6 [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
quota [XFS] split ondisk vs incore versions of xfs_bmbt_rec_t 2007-10-15 16:25:51 +10:00
support [XFS] kill move.[ch] 2007-10-15 16:50:26 +10:00
Kbuild
Kconfig
Makefile
Makefile-linux-2.6 [XFS] kill move.[ch] 2007-10-15 16:50:26 +10:00
xfs.h [XFS] Concurrent Multi-File Data Streams 2007-07-14 15:40:53 +10:00
xfs_acl.c
xfs_acl.h
xfs_ag.h [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_alloc.c [XFS] Clean up function name handling in tracing code 2007-07-14 15:41:24 +10:00
xfs_alloc.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_alloc_btree.c [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_alloc_btree.h
xfs_arch.h
xfs_attr.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_attr.h
xfs_attr_leaf.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_attr_leaf.h
xfs_attr_sf.h
xfs_behavior.c
xfs_behavior.h
xfs_bit.c [XFS] Kill off xfs_count_bits 2007-07-14 15:36:43 +10:00
xfs_bit.h [XFS] Kill off xfs_count_bits 2007-07-14 15:36:43 +10:00
xfs_bmap.c [XFS] remove unessecary vfs argument to DM_EVENT_ENABLED 2007-10-15 16:45:25 +10:00
xfs_bmap.h [XFS] split ondisk vs incore versions of xfs_bmbt_rec_t 2007-10-15 16:25:51 +10:00
xfs_bmap_btree.c [XFS] Fix build regression from mod/commit which did cleanup of xfs_bmbt_*set_allf 2007-10-15 16:47:32 +10:00
xfs_bmap_btree.h [XFS] endianess annotations for xfs_bmbt_rec_t 2007-10-15 16:26:44 +10:00
xfs_btree.c
xfs_btree.h [XFS] Simplify XFS min/max macros. 2007-07-14 15:36:53 +10:00
xfs_buf_item.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_buf_item.h Revert "[XFS] Avoid replaying inode buffer initialisation log items if on-disk version is newer." 2007-10-01 16:39:37 +10:00
xfs_clnt.h [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_da_btree.c [XFS] fix sparse shadowed variable warnings 2007-09-05 14:50:26 +10:00
xfs_da_btree.h
xfs_dfrag.c [XFS] propogate return codes from flush routines 2007-05-08 13:49:27 +10:00
xfs_dfrag.h
xfs_dinode.h [XFS] dinode endianess annotations 2007-10-15 16:48:30 +10:00
xfs_dir2.c [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2.h [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2_block.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_dir2_block.h [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2_data.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_dir2_data.h [XFS] Reduce shouting by removing unnecessary macros from dir2 code. 2007-07-14 15:37:02 +10:00
xfs_dir2_leaf.c [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2_leaf.h [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2_node.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_dir2_node.h [XFS] Reduce shouting by removing unnecessary macros from dir2 code. 2007-07-14 15:37:02 +10:00
xfs_dir2_sf.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_dir2_sf.h [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_dir2_trace.c
xfs_dir2_trace.h
xfs_dmapi.h [XFS] optimize dmapi event tests w/o dmapi config 2007-10-15 16:45:55 +10:00
xfs_dmops.c
xfs_error.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_error.h
xfs_extfree_item.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_extfree_item.h
xfs_filestream.c [XFS] fix filestreams on 32-bit boxes 2007-09-20 19:40:19 +10:00
xfs_filestream.h [XFS] Concurrent Multi-File Data Streams 2007-07-14 15:40:53 +10:00
xfs_fs.h [XFS] Concurrent Multi-File Data Streams 2007-07-14 15:40:53 +10:00
xfs_fsops.c [XFS] superblock endianess annotations 2007-10-15 16:49:09 +10:00
xfs_fsops.h
xfs_ialloc.c [XFS] dinode endianess annotations 2007-10-15 16:48:30 +10:00
xfs_ialloc.h [XFS] Pick a single default inode cluster size. 2007-10-15 16:39:35 +10:00
xfs_ialloc_btree.c
xfs_ialloc_btree.h
xfs_iget.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_imap.h
xfs_inode.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_inode.h [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_inode_item.c
xfs_inode_item.h
xfs_inum.h
xfs_iocore.c [XFS] Fix to prevent the notorious 'NULL files' problem after a crash. 2007-05-08 13:49:46 +10:00
xfs_iomap.c [XFS] Cleanup inode extent size hint extraction 2007-07-14 15:35:36 +10:00
xfs_iomap.h [XFS] Fix to prevent the notorious 'NULL files' problem after a crash. 2007-05-08 13:49:46 +10:00
xfs_itable.c [XFS] dinode endianess annotations 2007-10-15 16:48:30 +10:00
xfs_itable.h [XFS] Fix XFS_IOC_FSBULKSTAT{,_SINGLE} & XFS_IOC_FSINUMBERS in compat mode 2007-07-14 15:42:50 +10:00
xfs_log.c [XFS] choose single default logbuf count & size 2007-10-15 16:38:23 +10:00
xfs_log.h
xfs_log_priv.h [XFS] clean up xfs_start_flags 2007-10-15 16:42:18 +10:00
xfs_log_recover.c [XFS] superblock endianess annotations 2007-10-15 16:49:09 +10:00
xfs_log_recover.h
xfs_mount.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_mount.h [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_mru_cache.c [XFS] On-demand reaping of the MRU cache 2007-09-17 16:42:02 +10:00
xfs_mru_cache.h [XFS] On-demand reaping of the MRU cache 2007-09-17 16:42:02 +10:00
xfs_qmops.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_quota.h [XFS] Fix uquota and oquota enforcement problems. 2007-05-08 13:49:33 +10:00
xfs_refcache.h
xfs_rename.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_rtalloc.c [XFS] Don't grow filesystems past the size they can index. 2007-07-14 15:21:29 +10:00
xfs_rtalloc.h
xfs_rw.c [XFS] The last argument "lsn" of xfs_trans_commit() is always called with 2007-05-08 13:48:42 +10:00
xfs_rw.h [XFS] Remove m_nreadaheads 2007-10-15 16:37:46 +10:00
xfs_sb.h [XFS] superblock endianess annotations 2007-10-15 16:49:09 +10:00
xfs_trans.c [XFS] superblock endianess annotations 2007-10-15 16:49:09 +10:00
xfs_trans.h [XFS] Lazy Superblock Counters 2007-07-14 15:28:50 +10:00
xfs_trans_ail.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_trans_buf.c Revert "[XFS] Avoid replaying inode buffer initialisation log items if on-disk version is newer." 2007-10-01 16:39:37 +10:00
xfs_trans_extfree.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_trans_inode.c
xfs_trans_item.c
xfs_trans_priv.h
xfs_trans_space.h
xfs_types.h [XFS] use filldir internally 2007-10-15 16:49:49 +10:00
xfs_utils.c [XFS] propogate return codes from flush routines 2007-05-08 13:49:27 +10:00
xfs_utils.h
xfs_vfsops.c [XFS] do not have XFSMNT_IDELETE as default when mounted with XFSMNT_DMAPI 2007-10-15 16:53:36 +10:00
xfs_vnodeops.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00