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linux/fs/nilfs2
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Ryusuke Konishi 201913ed74 nilfs2: fix circular locking dependency of writer mutex 
This fixes the following circular locking dependency problem:

 =======================================================
 [ INFO: possible circular locking dependency detected ]
 2.6.30-rc3 #5
 -------------------------------------------------------
 segctord/3895 is trying to acquire lock:
  (&nilfs->ns_writer_mutex){+.+...}, at: [<d0d02172>]
   nilfs_mdt_get_block+0x89/0x20f [nilfs2]

 but task is already holding lock:
  (&bmap->b_sem){++++..}, at: [<d0d02d99>]
   nilfs_bmap_propagate+0x14/0x2e [nilfs2]

 which lock already depends on the new lock.

The bugfix is done by replacing call sites of nilfs_get_writer() which
are never called from read-only context with direct dereferencing of
pointer to a writable FS-instance.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
 		2009-05-09 13:36:57 +09:00
..
Makefile nilfs2: update makefile and Kconfig 2009-04-07 08:31:16 -07:00
alloc.c nilfs2: persistent object allocator 2009-04-07 08:31:13 -07:00
alloc.h nilfs2: persistent object allocator 2009-04-07 08:31:13 -07:00
bmap.c nilfs2: fix lockdep recursive locking warning on bmap 2009-04-13 09:53:49 +09:00
bmap.h nilfs2: integrated block mapping 2009-04-07 08:31:13 -07:00
bmap_union.h nilfs2: integrated block mapping 2009-04-07 08:31:13 -07:00
btnode.c nilfs2: B-tree node cache 2009-04-07 08:31:13 -07:00
btnode.h nilfs2: B-tree node cache 2009-04-07 08:31:13 -07:00
btree.c nilfs2: replace BUG_ON and BUG calls triggerable from ioctl 2009-04-07 08:31:19 -07:00
btree.h nilfs2: B-tree based block mapping 2009-04-07 08:31:13 -07:00
cpfile.c nilfs2: replace BUG_ON and BUG calls triggerable from ioctl 2009-04-07 08:31:19 -07:00
cpfile.h nilfs2: fix gc failure on volumes keeping numerous snapshots 2009-04-07 08:31:17 -07:00
dat.c nilfs2: replace BUG_ON and BUG calls triggerable from ioctl 2009-04-07 08:31:19 -07:00
dat.h nilfs2: disk address translator 2009-04-07 08:31:14 -07:00
dir.c nilfs2: use unlocked_ioctl 2009-04-07 08:31:19 -07:00
direct.c nilfs2: replace BUG_ON and BUG calls triggerable from ioctl 2009-04-07 08:31:19 -07:00
direct.h nilfs2: direct block mapping 2009-04-07 08:31:13 -07:00
file.c nilfs2: use unlocked_ioctl 2009-04-07 08:31:19 -07:00
gcdat.c nilfs2: another dat for garbage collection 2009-04-07 08:31:16 -07:00
gcinode.c nilfs2: support nanosecond timestamp 2009-04-07 08:31:20 -07:00
ifile.c nilfs2: inode map file 2009-04-07 08:31:14 -07:00
ifile.h nilfs2: inode map file 2009-04-07 08:31:14 -07:00
inode.c nilfs2: support nanosecond timestamp 2009-04-07 08:31:20 -07:00
ioctl.c nilfs2: fix circular locking dependency of writer mutex 2009-05-09 13:36:57 +09:00
mdt.c nilfs2: fix circular locking dependency of writer mutex 2009-05-09 13:36:57 +09:00
mdt.h nilfs2: meta data file 2009-04-07 08:31:13 -07:00
namei.c nilfs2: avoid double error caused by nilfs_transaction_end 2009-04-07 08:31:17 -07:00
nilfs.h nilfs2: remove module version 2009-04-13 09:53:50 +09:00
page.c nilfs2: replace BUG_ON and BUG calls triggerable from ioctl 2009-04-07 08:31:19 -07:00
page.h nilfs2: buffer and page operations 2009-04-07 08:31:13 -07:00
recovery.c nilfs2: fix possible recovery failure due to block creation without writer 2009-05-09 13:36:56 +09:00
sb.h
…
segbuf.c nilfs2: simplify handling of active state of segments 2009-04-07 08:31:20 -07:00
segbuf.h nilfs2: simplify handling of active state of segments 2009-04-07 08:31:20 -07:00
seglist.h nilfs2: segment constructor 2009-04-07 08:31:15 -07:00
segment.c nilfs2: introduce secondary super block 2009-04-07 08:31:20 -07:00
segment.h nilfs2: introduce secondary super block 2009-04-07 08:31:20 -07:00
sufile.c nilfs2: fix possible mismatch of sufile counters on recovery 2009-04-13 09:53:52 +09:00
sufile.h nilfs2: fix possible mismatch of sufile counters on recovery 2009-04-13 09:53:52 +09:00
super.c nilfs2: remove module version 2009-04-13 09:53:50 +09:00
the_nilfs.c nilfs2: fix lockdep recursive locking warning on meta data files 2009-04-13 09:53:50 +09:00
the_nilfs.h nilfs2: introduce secondary super block 2009-04-07 08:31:20 -07:00