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OpenCloudOS-Kernel/fs/ocfs2
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Jan Kara e3a767b60f ocfs2: implement delayed dropping of last dquot reference 
We cannot drop last dquot reference from downconvert thread as that
creates the following deadlock:

NODE 1                                  NODE2
holds dentry lock for 'foo'
holds inode lock for GLOBAL_BITMAP_SYSTEM_INODE
                                        dquot_initialize(bar)
                                          ocfs2_dquot_acquire()
                                            ocfs2_inode_lock(USER_QUOTA_SYSTEM_INODE)
                                            ...
downconvert thread (triggered from another
node or a different process from NODE2)
  ocfs2_dentry_post_unlock()
    ...
    iput(foo)
      ocfs2_evict_inode(foo)
        ocfs2_clear_inode(foo)
          dquot_drop(inode)
            ...
	    ocfs2_dquot_release()
              ocfs2_inode_lock(USER_QUOTA_SYSTEM_INODE)
               - blocks
                                            finds we need more space in
                                            quota file
                                            ...
                                            ocfs2_extend_no_holes()
                                              ocfs2_inode_lock(GLOBAL_BITMAP_SYSTEM_INODE)
                                                - deadlocks waiting for
                                                  downconvert thread

We solve the problem by postponing dropping of the last dquot reference to
a workqueue if it happens from the downconvert thread.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2014-04-03 16:20:54 -07:00
..
cluster Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block 2014-01-30 11:19:05 -08:00
dlm ocfs2: dlm: fix recovery hung 2014-04-03 16:20:54 -07:00
dlmfs ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
Kconfig ocfs2: Make OCFS2_FS depend on CONFIGFS_FS 2011-01-16 21:22:40 +00:00
Makefile ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
acl.c ocfs2: use generic posix ACL infrastructure 2014-01-25 23:58:21 -05:00
acl.h ocfs2: use generic posix ACL infrastructure 2014-01-25 23:58:21 -05:00
alloc.c ocfs2: improve fsync efficiency and fix deadlock between aio_write and sync_file 2014-04-03 16:20:53 -07:00
alloc.h ocfs2: Add ocfs2_trim_fs for SSD trim support. 2011-05-23 23:37:18 -07:00
aops.c ocfs2: improve fsync efficiency and fix deadlock between aio_write and sync_file 2014-04-03 16:20:53 -07:00
aops.h ocfs2: change ip_unaligned_aio to of type mutex from atomit_t 2014-04-03 16:20:53 -07:00
blockcheck.c ocfs2: kill endianness abuses in blockcheck.c 2012-05-29 23:28:35 -04:00
blockcheck.h
…
buffer_head_io.c ocfs2: return ENOMEM when sb_getblk() fails 2013-11-13 12:09:00 +09:00
buffer_head_io.h
…
dcache.c ocfs2: needs ->d_lock to poke in ->d_parent->d_inode from ->d_revalidate() 2013-09-29 22:02:20 -04:00
dcache.h Track negative entries v3 2010-09-10 09:18:15 -07:00
dir.c ocfs2: improve fsync efficiency and fix deadlock between aio_write and sync_file 2014-04-03 16:20:53 -07:00
dir.h [readdir] convert ocfs2 2013-06-29 12:57:02 +04:00
dlmglue.c ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
dlmglue.h ocfs2: Fix lockdep warning in reflink. 2010-09-10 09:19:06 -07:00
export.c fs: encode_fh: return FILEID_INVALID if invalid fid_type 2013-02-26 02:46:10 -05:00
export.h
…
extent_map.c ocfs2: fix the end cluster offset of FIEMAP 2013-09-11 15:56:53 -07:00
extent_map.h ocfs2: Implement llseek() 2011-07-25 14:58:15 -07:00
file.c ocfs2: improve fsync efficiency and fix deadlock between aio_write and sync_file 2014-04-03 16:20:53 -07:00
file.h ->permission() sanitizing: don't pass flags to ->permission() 2011-07-20 01:43:24 -04:00
heartbeat.c ocfs2: Remove mlog(0) from fs/ocfs2/heartbeat.c 2011-02-23 21:17:39 +08:00
heartbeat.h
…
inode.c ocfs2: move dquot_initialize() in ocfs2_delete_inode() somewhat later 2014-04-03 16:20:54 -07:00
inode.h ocfs2: remove OCFS2_INODE_SKIP_DELETE flag 2014-04-03 16:20:54 -07:00
ioctl.c ocfs2: adjust minlen with discard_granularity in the FITRIM ioctl 2014-01-21 16:19:42 -08:00
ioctl.h
…
journal.c ocfs2: remove OCFS2_INODE_SKIP_DELETE flag 2014-04-03 16:20:54 -07:00
journal.h ocfs2: improve fsync efficiency and fix deadlock between aio_write and sync_file 2014-04-03 16:20:53 -07:00
localalloc.c ocfs2: free allocated clusters if error occurs after ocfs2_claim_clusters 2014-02-06 13:48:51 -08:00
localalloc.h ocfs2: free allocated clusters if error occurs after ocfs2_claim_clusters 2014-02-06 13:48:51 -08:00
locks.c ocfs2: remove INODE from unused files. 2011-02-21 11:18:23 +08:00
locks.h
…
mmap.c kill f_vfsmnt 2013-02-26 02:46:10 -05:00
mmap.h
…
move_extents.c ocfs2: remove redundant ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() 2014-01-21 16:19:42 -08:00
move_extents.h Ocfs2/move_extents: move/defrag extents within a certain range. 2011-05-25 15:17:12 +08:00
namei.c ocfs2: improve fsync efficiency and fix deadlock between aio_write and sync_file 2014-04-03 16:20:53 -07:00
namei.h
…
ocfs1_fs_compat.h
…
ocfs2.h ocfs2: implement delayed dropping of last dquot reference 2014-04-03 16:20:54 -07:00
ocfs2_fs.h Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
ocfs2_ioctl.h Ocfs2/move_extents: Adding new ioctl code 'OCFS2_IOC_MOVE_EXT' to ocfs2. 2011-05-25 15:17:08 +08:00
ocfs2_lockid.h
…
ocfs2_lockingver.h
…
ocfs2_trace.h ocfs2: lighten up allocate transaction 2013-09-11 15:56:28 -07:00
quota.h ocfs2: implement delayed dropping of last dquot reference 2014-04-03 16:20:54 -07:00
quota_global.c ocfs2: implement delayed dropping of last dquot reference 2014-04-03 16:20:54 -07:00
quota_local.c ocfs2: fix quota file corruption 2014-03-04 07:55:48 -08:00
refcounttree.c ocfs2: use generic posix ACL infrastructure 2014-01-25 23:58:21 -05:00
refcounttree.h ocfs2: fix NULL pointer dereference in ocfs2_duplicate_clusters_by_page 2013-08-13 17:57:49 -07:00
reservations.c ocfs2: Remove masklog ML_RESERVATIONS. 2011-02-23 22:10:56 +08:00
reservations.h Fix common misspellings 2011-03-31 11:26:23 -03:00
resize.c ocfs2: do not call brelse() if group_bh is not initialized in ocfs2_group_add() 2013-11-13 12:09:01 +09:00
resize.h
…
slot_map.c ocfs2: Clean up messages in the fs 2011-07-24 10:34:54 -07:00
slot_map.h
…
stack_o2cb.c ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
stack_user.c ocfs2: fix sparse non static symbol warning 2014-01-21 16:19:42 -08:00
stackglue.c ocfs2: add dlm_recover_callback_support in sysfs 2014-04-03 16:20:54 -07:00
stackglue.h ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
suballoc.c ocfs2: remove redundant ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() 2014-01-21 16:19:42 -08:00
suballoc.h ocfs2: remove redundant ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() 2014-01-21 16:19:42 -08:00
super.c ocfs2: implement delayed dropping of last dquot reference 2014-04-03 16:20:54 -07:00
super.h treewide: use __printf not __attribute__((format(printf,...))) 2011-10-31 17:30:54 -07:00
symlink.c ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path 2013-02-26 02:46:12 -05:00
symlink.h ocfs: simplify symlink handling 2012-05-29 23:28:40 -04:00
sysfile.c ocfs2: remove kfree() redundant null checks 2013-02-21 17:22:19 -08:00
sysfile.h
…
uptodate.c ocfs2: Remove masklog ML_UPTODATE. 2011-02-24 16:22:20 +08:00
uptodate.h
…
xattr.c ocfs2: use generic posix ACL infrastructure 2014-01-25 23:58:21 -05:00
xattr.h ocfs2: use generic posix ACL infrastructure 2014-01-25 23:58:21 -05:00