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linux-sg2042/fs/xfs
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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 kbuild/xfs: introduce fs/xfs/Kbuild 2006-01-09 20:48:03 +01:00
Kconfig [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 2006-09-30 20:52:31 +02:00
Makefile [XFS] Sort out some cosmetic differences between XFS trees. 2005-09-05 11:47:01 +10:00
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] Remove unused header files for MAC and CAP checking functionality. 2007-02-10 18:37:28 +11:00
xfs_acl.h [XFS] Resolve a namespace collision on remaining vtypes for FreeBSD 2006-06-09 17:07:12 +10:00
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] Remove unused arguments from the XFS_BTREE_*_ADDR macros. 2007-02-10 18:37:33 +11:00
xfs_arch.h [XFS] Merge in trivial changes, sync up headers with userspace 2006-01-12 10:29:53 +11:00
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] Add EA list callbacks for xfs kernel use. Cleanup some namespace 2006-09-28 11:01:37 +10:00
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] Add EA list callbacks for xfs kernel use. Cleanup some namespace 2006-09-28 11:01:37 +10:00
xfs_attr_sf.h [XFS] endianess annotations for xfs_attr_shortform_t 2006-03-17 17:29:25 +11:00
xfs_behavior.c [XFS] remove bhv_lookup, _range version works aswell and has more useful 2006-09-28 10:58:52 +10:00
xfs_behavior.h [XFS] remove bhv_lookup, _range version works aswell and has more useful 2006-09-28 10:58:52 +10:00
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] endianess annotations for xfs_bmbt_key Trivial as there are no 2006-09-28 10:58:17 +10:00
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] Remove a bunch of unused functions from XFS. 2007-02-10 18:37:40 +11:00
xfs_dfrag.c [XFS] propogate return codes from flush routines 2007-05-08 13:49:27 +10:00
xfs_dfrag.h [XFS] Add parameters to xfs_bmapi() and xfs_bunmapi() to have them report 2006-06-09 14:48:12 +10:00
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] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_dir2_trace.h [XFS] Update license/copyright notices to match the prefered SGI 2005-11-02 14:58:39 +11:00
xfs_dmapi.h [XFS] optimize dmapi event tests w/o dmapi config 2007-10-15 16:45:55 +10:00
xfs_dmops.c [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_error.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_error.h [XFS] Remove a bunch of unused functions from XFS. 2007-02-10 18:37:40 +11:00
xfs_extfree_item.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_extfree_item.h [XFS] cleanup the field types of some item format structures 2006-09-28 10:55:43 +10:00
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] Write log dummy record when freezing filesystem 2006-01-11 15:30:08 +11:00
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] use NULL for pointer initialisation instead of zero-cast-to-ptr 2006-09-28 10:58:40 +10:00
xfs_ialloc_btree.h [XFS] Remove unused arguments from the XFS_BTREE_*_ADDR macros. 2007-02-10 18:37:33 +11:00
xfs_iget.c [XFS] Radix tree based inode caching 2007-10-15 16:50:50 +10:00
xfs_imap.h [XFS] Update license/copyright notices to match the prefered SGI 2005-11-02 14:58:39 +11:00
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] Keep stack usage down for 4k stacks by using noinline. 2007-02-10 18:34:56 +11:00
xfs_inode_item.h [XFS] cleanup the field types of some item format structures 2006-09-28 10:55:43 +10:00
xfs_inum.h [XFS] Update license/copyright notices to match the prefered SGI 2005-11-02 14:58:39 +11:00
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] Remove several macros that are no longer used anywhere 2006-09-28 11:02:57 +10:00
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] Update license/copyright notices to match the prefered SGI 2005-11-02 14:58:39 +11:00
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] Cleanup cosmetic differences between source trees. 2005-11-03 16:14:31 +11:00
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] Remove a bunch of unused functions from XFS. 2007-02-10 18:37:40 +11:00
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] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
xfs_trans_item.c [XFS] Portability changes: remove prdev, stick to one diagnostic 2006-06-09 15:29:40 +10:00
xfs_trans_priv.h [XFS] Add lock annotations to xfs_trans_update_ail and 2006-09-28 11:04:07 +10:00
xfs_trans_space.h [XFS] Remove version 1 directory code. Never functioned on Linux, just 2006-06-20 13:04:51 +10:00
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] Resolve a namespace collision on remaining vtypes for FreeBSD 2006-06-09 17:07:12 +10:00
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