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40f165f416
linux/fs/ocfs2
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Tao Ma 40f165f416 ocfs2: Move orphan scan work to ocfs2_wq. 
We used to let orphan scan work in the default work queue,
but there is a corner case which will make the system deadlock.
The scenario is like this:
1. set heartbeat threadshold to 200. this will allow us to have a
   great chance to have a orphan scan work before our quorum decision.
2. mount node 1.
3. after 1~2 minutes, mount node 2(in order to make the bug easier
   to reproduce, better add maxcpus=1 to kernel command line).
4. node 1 do orphan scan work.
5. node 2 do orphan scan work.
6. node 1 do orphan scan work. After this, node 1 hold the orphan scan
   lock while node 2 know node 1 is the master.
7. ifdown eth2 in node 2(eth2 is what we do ocfs2 interconnection).

Now when node 2 begins orphan scan, the system queue is blocked.

The root cause is that both orphan scan work and quorum decision work
will use the system event work queue. orphan scan has a chance of
blocking the event work queue(in dlm_wait_for_node_death) so that there
is no chance for quorum decision work to proceed.

This patch resolve it by moving orphan scan work to ocfs2_wq.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-06-15 15:43:48 -07:00
..
cluster Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 2010-05-21 07:20:17 -07:00
dlm fs/ocfs2/dlm: Add missing spin_unlock 2010-06-15 15:43:46 -07:00
dlmfs ocfs2_dlmfs: Fix math error when reading LVB. 2010-04-23 15:24:59 -07:00
acl.c ocfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
acl.h ocfs2: Always include ACL support 2009-10-28 23:05:57 -07:00
alloc.c Merge branch 'discontig-bg' of git://oss.oracle.com/git/tma/linux-2.6 into ocfs2-merge-window 2010-05-18 16:40:42 -07:00
alloc.h Merge branch 'discontig-bg' of git://oss.oracle.com/git/tma/linux-2.6 into ocfs2-merge-window 2010-05-18 16:40:42 -07:00
aops.c ocfs2: use allocation reservations during file write 2010-05-05 18:17:30 -07:00
aops.h ocfs2: Add CoW support. 2009-09-22 20:09:36 -07:00
blockcheck.c kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN 2010-05-25 08:07:02 -07:00
blockcheck.h ocfs2: Add statistics for the checksum and ecc operations. 2009-06-03 19:15:36 -07:00
buffer_head_io.c Merge branch 'skip_delete_inode' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2-mark into ocfs2-fixes 2010-04-30 13:37:29 -07:00
buffer_head_io.h ocfs2: Take the inode out of the metadata read/write paths. 2009-09-04 16:07:48 -07:00
dcache.c ocfs2: invalidate dentry if its dentry_lock isn't initialized. 2009-08-27 18:10:54 -07:00
dcache.h ocfs2: Fix deadlock on umount 2009-07-21 15:47:55 -07:00
dir.c Merge branch 'discontig-bg' of git://oss.oracle.com/git/tma/linux-2.6 into ocfs2-merge-window 2010-05-18 16:40:42 -07:00
dir.h ocfs2: Introduce dir free space list 2009-04-03 11:39:16 -07:00
dlmglue.c ocfs2: Avoid unnecessary block mapping when refreshing quota info 2010-05-21 19:30:46 +02:00
dlmglue.h ocfs2: Add new refcount tree lock resource in dlmglue. 2009-09-22 20:09:28 -07:00
export.c ocfs2/trivial: Remove trailing whitespaces 2010-01-25 19:20:51 -08:00
export.h
extent_map.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
extent_map.h ocfs2: Return extent flags for xattr value tree. 2009-09-22 20:09:39 -07:00
file.c kill spurious reference to vmtruncate 2010-05-27 22:15:42 -04:00
file.h ocfs2: Integrate CoW in file write. 2009-09-22 20:09:37 -07:00
heartbeat.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
heartbeat.h
inode.c Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 2010-05-21 07:20:17 -07:00
inode.h Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 2010-05-21 07:20:17 -07:00
ioctl.c ocfs2: Use compat_ptr in reflink_arguments. 2010-02-02 18:56:37 -08:00
ioctl.h Ocfs2: Move ocfs2 ioctl definitions from ocfs2_fs.h to newly added ocfs2_ioctl.h 2010-03-02 14:10:20 -08:00
journal.c ocfs2: Move orphan scan work to ocfs2_wq. 2010-06-15 15:43:48 -07:00
journal.h ocfs2: Make ocfs2_journal_dirty() void. 2010-05-05 18:17:29 -07:00
Kconfig ocfs2: Always include ACL support 2009-10-28 23:05:57 -07:00
localalloc.c ocfs2/trivial: Code cleanup for allocation reservation. 2010-05-05 18:18:09 -07:00
localalloc.h ocfs2: increase the default size of local alloc windows 2010-05-05 18:18:07 -07:00
locks.c [PATCH] Skip check for mandatory locks when unlocking 2010-03-17 12:07:16 -07:00
locks.h
Makefile ocfs2: allocation reservations 2010-05-05 18:17:30 -07:00
mmap.c Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 2010-05-21 07:20:17 -07:00
mmap.h
namei.c ocfs2: replace inode uid,gid,mode initialization with helper function 2010-05-21 18:31:25 -04:00
namei.h ocfs2: Create reflinked file in orphan dir. 2009-09-22 20:09:48 -07:00
ocfs1_fs_compat.h
ocfs2_fs.h ocfs2: increase the default size of local alloc windows 2010-05-05 18:18:07 -07:00
ocfs2_ioctl.h Ocfs2: Move ocfs2 ioctl definitions from ocfs2_fs.h to newly added ocfs2_ioctl.h 2010-03-02 14:10:20 -08:00
ocfs2_lockid.h ocfs2: Add new refcount tree lock resource in dlmglue. 2009-09-22 20:09:28 -07:00
ocfs2_lockingver.h ocfs2_dlmfs: Enable the use of user cluster stacks. 2010-02-26 15:41:18 -08:00
ocfs2.h ocfs2: Add dir_resv_level mount option 2010-05-05 18:18:07 -07:00
quota_global.c ocfs2: Fix NULL pointer deref when writing local dquot 2010-05-21 19:30:48 +02:00
quota_local.c ocfs2: Fix lock inversion in quotas during umount 2010-05-21 19:30:48 +02:00
quota.h ocfs2: Fix NULL pointer deref when writing local dquot 2010-05-21 19:30:48 +02:00
refcounttree.c Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 2010-05-21 07:20:17 -07:00
refcounttree.h Ocfs2: Optimize ocfs2 truncate to use ocfs2_remove_btree_range() instead. 2010-05-18 12:25:10 -07:00
reservations.c ocfs2/trivial: Code cleanup for allocation reservation. 2010-05-05 18:18:09 -07:00
reservations.h ocfs2: make ocfs2_adjust_resv_from_alloc simple. 2010-05-05 18:18:09 -07:00
resize.c ocfs2: Make ocfs2_journal_dirty() void. 2010-05-05 18:17:29 -07:00
resize.h
slot_map.c ocfs2: Take the inode out of the metadata read/write paths. 2009-09-04 16:07:48 -07:00
slot_map.h
stack_o2cb.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
stack_user.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
stackglue.c ocfs2_dlmfs: Enable the use of user cluster stacks. 2010-02-26 15:41:18 -08:00
stackglue.h ocfs2_dlmfs: Enable the use of user cluster stacks. 2010-02-26 15:41:18 -08:00
suballoc.c ocfs2: Silence a gcc warning. 2010-05-18 16:48:41 -07:00
suballoc.h ocfs2: allocation reservations 2010-05-05 18:17:30 -07:00
super.c quota: rename default quotactl methods to dquot_ 2010-05-24 14:10:17 +02:00
super.h ocfs2: Wrap signal blocking in void functions. 2010-05-10 11:50:10 -07:00
symlink.c ocfs2: Fix refcnt leak on ocfs2_fast_follow_link() error path 2010-01-11 15:38:50 -08:00
symlink.h
sysfile.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sysfile.h
uptodate.c ocfs2/trivial: Remove trailing whitespaces 2010-01-25 19:20:51 -08:00
uptodate.h ocfs2: Pass struct ocfs2_caching_info to the journal functions. 2009-09-04 16:07:50 -07:00
ver.c
ver.h
xattr.c ocfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
xattr.h ocfs: constify xattr_handler 2010-05-21 18:31:20 -04:00