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83273932fb
linux/fs/ocfs2
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Srinivas Eeda 83273932fb ocfs2: timer to queue scan of all orphan slots 
When a dentry is unlinked, the unlinking node takes an EX on the dentry lock
before moving the dentry to the orphan directory. Other nodes that have
this dentry in cache have a PR on the same dentry lock.  When the EX is
requested, the other nodes flag the corresponding inode as MAYBE_ORPHANED
during downconvert.  The inode is finally deleted when the last node to iput
the inode sees that i_nlink==0 and the MAYBE_ORPHANED flag is set.

A problem arises if a node is forced to free dentry locks because of memory
pressure. If this happens, the node will no longer get downconvert
notifications for the dentries that have been unlinked on another node.
If it also happens that node is actively using the corresponding inode and
happens to be the one performing the last iput on that inode, it will fail
to delete the inode as it will not have the MAYBE_ORPHANED flag set.

This patch fixes this shortcoming by introducing a periodic scan of the
orphan directories to delete such inodes. Care has been taken to distribute
the workload across the cluster so that no one node has to perform the task
all the time.

Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-06-03 19:14:31 -07:00
..
cluster ocfs2: update comments in masklog.h 2009-05-05 14:48:11 -07:00
dlm ocfs2/dlm: Tweak mle_state output 2009-04-03 11:39:25 -07:00
acl.c New helper - current_umask() 2009-03-31 23:00:26 -04:00
acl.h ocfs2: add ocfs2_init_acl in mknod 2009-01-05 08:34:20 -08:00
alloc.c ocfs2: Add a name indexed b-tree to directory inodes 2009-04-03 11:39:15 -07:00
alloc.h ocfs2: Add a name indexed b-tree to directory inodes 2009-04-03 11:39:15 -07:00
aops.c ocfs2: Pagecache usage optimization on ocfs2 2009-04-03 11:39:26 -07:00
aops.h ocfs2: convert to new aops 2007-10-16 09:42:58 -07:00
blockcheck.c ocfs2: One more hamming code optimization. 2009-01-05 08:40:35 -08:00
blockcheck.h ocfs2: Add the underlying blockcheck code. 2009-01-05 08:40:31 -08:00
buffer_head_io.c ocfs2: Use BH_JBDPrivateStart instead of BH_Unshadow 2009-01-05 08:40:24 -08:00
buffer_head_io.h ocfs2: Validate metadata only when it's read from disk. 2009-01-05 08:36:53 -08:00
dcache.c ocfs2: Add missing iput() during error handling in ocfs2_dentry_attach_lock() 2009-04-23 14:56:13 -07:00
dcache.h constify dentry_operations: OCFS2 2009-03-27 14:44:02 -04:00
dir.c ocfs2: Correct ordering of ip_alloc_sem and localloc locks for directories 2009-06-03 19:14:30 -07:00
dir.h ocfs2: Introduce dir free space list 2009-04-03 11:39:16 -07:00
dlmglue.c ocfs2: timer to queue scan of all orphan slots 2009-06-03 19:14:31 -07:00
dlmglue.h ocfs2: timer to queue scan of all orphan slots 2009-06-03 19:14:31 -07:00
export.c ocfs2: Fix some printk() warnings. 2009-04-21 16:31:20 -07:00
export.h exportfs: make struct export_operations const 2007-10-22 08:13:21 -07:00
extent_map.c ocfs2: Wrap virtual block reads in ocfs2_read_virt_blocks() 2009-01-05 08:36:54 -08:00
extent_map.h ocfs2: Wrap virtual block reads in ocfs2_read_virt_blocks() 2009-01-05 08:36:54 -08:00
file.c ocfs2: Fix possible deadlock with quotas in ocfs2_setattr() 2009-06-03 19:14:29 -07:00
file.h ocfs2: Implementation of local and global quota file handling 2009-01-05 08:40:23 -08:00
heartbeat.c ocfs2: Move o2hb functionality into the stack glue. 2008-04-18 08:56:04 -07:00
heartbeat.h ocfs2: Move o2hb functionality into the stack glue. 2008-04-18 08:56:04 -07:00
inode.c ocfs2: fix rare stale inode errors when exporting via nfs 2009-04-03 11:39:25 -07:00
inode.h ocfs2: fix rare stale inode errors when exporting via nfs 2009-04-03 11:39:25 -07:00
ioctl.c ocfs2: Don't check for NULL before brelse() 2008-10-13 17:02:44 -07:00
ioctl.h ocfs2: Convert ocfs2 over to unlocked_ioctl 2008-04-18 08:56:11 -07:00
journal.c ocfs2: timer to queue scan of all orphan slots 2009-06-03 19:14:31 -07:00
journal.h ocfs2: timer to queue scan of all orphan slots 2009-06-03 19:14:31 -07:00
Kconfig fs/Kconfig: move ocfs2 out 2009-01-22 13:15:54 +03:00
localalloc.c ocfs2: Remove debugfs file local_alloc_stats 2009-04-03 11:39:15 -07:00
localalloc.h ocfs2: throttle back local alloc when low on disk space 2008-10-13 13:57:57 -07:00
locks.c ocfs2: POSIX file locks support 2008-10-13 13:57:57 -07:00
locks.h ocfs2: POSIX file locks support 2008-10-13 13:57:57 -07:00
Makefile ocfs2: Add the underlying blockcheck code. 2009-01-05 08:40:31 -08:00
mmap.c mm: page_mkwrite change prototype to match fault 2009-04-01 08:59:14 -07:00
mmap.h
namei.c ocfs2/trivial: Remove unused variable in ocfs2_rename. 2009-04-29 10:57:18 -07:00
namei.h ocfs2: Move directory manipulation code into dir.c 2007-10-12 11:54:36 -07:00
ocfs1_fs_compat.h fs/: Spelling fixes 2008-02-03 17:33:42 +02:00
ocfs2_fs.h ocfs2: Enable indexed directories 2009-04-03 11:39:16 -07:00
ocfs2_lockid.h ocfs2: timer to queue scan of all orphan slots 2009-06-03 19:14:31 -07:00
ocfs2_lockingver.h ocfs2: Negotiate locking protocol versions. 2008-02-06 16:11:29 -08:00
ocfs2.h ocfs2: timer to queue scan of all orphan slots 2009-06-03 19:14:31 -07:00
quota_global.c ocfs2: Fix possible deadlock in ocfs2_global_read_dquot() 2009-06-03 19:14:28 -07:00
quota_local.c ocfs2: Fix possible deadlock in quota recovery 2009-06-03 19:14:30 -07:00
quota.h ocfs2: Fix ocfs2_read_quota_block() error handling. 2009-01-05 08:40:24 -08:00
resize.c ocfs2: Use metadata-specific ocfs2_journal_access_*() functions. 2009-01-05 08:40:32 -08:00
resize.h [PATCH 2/2] ocfs2: Implement group add for online resize 2008-01-25 15:04:24 -08:00
slot_map.c ocfs2: Validate metadata only when it's read from disk. 2009-01-05 08:36:53 -08:00
slot_map.h ocfs2: De-magic the in-memory slot map. 2008-04-18 08:56:03 -07:00
stack_o2cb.c ocfs2: Remove ->hangup() from stack glue operations. 2008-06-16 10:46:52 -07:00
stack_user.c ocfs2: initialize stack_user lvbptr 2008-12-01 14:46:39 -08:00
stackglue.c ocfs2: Remove pointless !! 2008-10-13 17:02:44 -07:00
stackglue.h ocfs2: POSIX file locks support 2008-10-13 13:57:57 -07:00
suballoc.c ocfs2: Fix some printk() warnings. 2009-04-21 16:31:20 -07:00
suballoc.h ocfs2: fix rare stale inode errors when exporting via nfs 2009-04-03 11:39:25 -07:00
super.c ocfs2: timer to queue scan of all orphan slots 2009-06-03 19:14:31 -07:00
super.h ocfs2: use s_maxbytes directly in ocfs2_change_file_space() 2007-08-09 17:25:07 -07:00
symlink.c ocfs2: Wrap inode block reads in a dedicated function. 2009-01-05 08:36:52 -08:00
symlink.h [PATCH] mark struct inode_operations const 2 2007-02-12 09:48:46 -08:00
sysfile.c ocfs2: Silence false lockdep warnings 2008-01-25 15:05:44 -08:00
sysfile.h
uptodate.c ocfs2: use smaller counters in ocfs2_remove_xattr_clusters_from_cache 2008-10-13 17:02:44 -07:00
uptodate.h ocfs2: Add helper function in uptodate.c for removing xattr clusters 2008-10-13 13:57:59 -07:00
ver.c ocfs2: bump version number 2008-01-25 15:05:46 -08:00
ver.h
xattr.c ocfs2: Don't printk the error when listing too many xattrs. 2009-05-05 14:43:24 -07:00
xattr.h ocfs2: Add a name indexed b-tree to directory inodes 2009-04-03 11:39:15 -07:00