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Peter Zijlstra 12fd352038 [PATCH] nfsd: lockdep annotation 
while doing a kernel make modules_install install over an NFS mount.

  =============================================
  [ INFO: possible recursive locking detected ]
  ---------------------------------------------
  nfsd/9550 is trying to acquire lock:
   (&inode->i_mutex){--..}, at: [<c034c845>] mutex_lock+0x1c/0x1f

  but task is already holding lock:
   (&inode->i_mutex){--..}, at: [<c034c845>] mutex_lock+0x1c/0x1f

  other info that might help us debug this:
  2 locks held by nfsd/9550:
   #0:  (hash_sem){..--}, at: [<cc895223>] exp_readlock+0xd/0xf [nfsd]
   #1:  (&inode->i_mutex){--..}, at: [<c034c845>] mutex_lock+0x1c/0x1f

  stack backtrace:
   [<c0103508>] show_trace_log_lvl+0x58/0x152
   [<c0103b8b>] show_trace+0xd/0x10
   [<c0103c2f>] dump_stack+0x19/0x1b
   [<c012aa57>] __lock_acquire+0x77a/0x9a3
   [<c012af4a>] lock_acquire+0x60/0x80
   [<c034c6c2>] __mutex_lock_slowpath+0xa7/0x20e
   [<c034c845>] mutex_lock+0x1c/0x1f
   [<c0162edc>] vfs_unlink+0x34/0x8a
   [<cc891d98>] nfsd_unlink+0x18f/0x1e2 [nfsd]
   [<cc89884f>] nfsd3_proc_remove+0x95/0xa2 [nfsd]
   [<cc88f0d4>] nfsd_dispatch+0xc0/0x178 [nfsd]
   [<c033e84d>] svc_process+0x3a5/0x5ed
   [<cc88f5ba>] nfsd+0x1a7/0x305 [nfsd]
   [<c0101005>] kernel_thread_helper+0x5/0xb
  DWARF2 unwinder stuck at kernel_thread_helper+0x5/0xb
  Leftover inexact backtrace:
   [<c0103b8b>] show_trace+0xd/0x10
   [<c0103c2f>] dump_stack+0x19/0x1b
   [<c012aa57>] __lock_acquire+0x77a/0x9a3
   [<c012af4a>] lock_acquire+0x60/0x80
   [<c034c6c2>] __mutex_lock_slowpath+0xa7/0x20e
   [<c034c845>] mutex_lock+0x1c/0x1f
   [<c0162edc>] vfs_unlink+0x34/0x8a
   [<cc891d98>] nfsd_unlink+0x18f/0x1e2 [nfsd]
   [<cc89884f>] nfsd3_proc_remove+0x95/0xa2 [nfsd]
   [<cc88f0d4>] nfsd_dispatch+0xc0/0x178 [nfsd]
   [<c033e84d>] svc_process+0x3a5/0x5ed
   [<cc88f5ba>] nfsd+0x1a7/0x305 [nfsd]
   [<c0101005>] kernel_thread_helper+0x5/0xb

  =============================================
  [ INFO: possible recursive locking detected ]
  ---------------------------------------------
  nfsd/9580 is trying to acquire lock:
   (&inode->i_mutex){--..}, at: [<c034cc1d>] mutex_lock+0x1c/0x1f

  but task is already holding lock:
   (&inode->i_mutex){--..}, at: [<c034cc1d>] mutex_lock+0x1c/0x1f

  other info that might help us debug this:
  2 locks held by nfsd/9580:
   #0:  (hash_sem){..--}, at: [<cc89522b>] exp_readlock+0xd/0xf [nfsd]
   #1:  (&inode->i_mutex){--..}, at: [<c034cc1d>] mutex_lock+0x1c/0x1f

  stack backtrace:
   [<c0103508>] show_trace_log_lvl+0x58/0x152
   [<c0103b8b>] show_trace+0xd/0x10
   [<c0103c2f>] dump_stack+0x19/0x1b
   [<c012aa63>] __lock_acquire+0x77a/0x9a3
   [<c012af56>] lock_acquire+0x60/0x80
   [<c034ca9a>] __mutex_lock_slowpath+0xa7/0x20e
   [<c034cc1d>] mutex_lock+0x1c/0x1f
   [<cc892ad1>] nfsd_setattr+0x2c8/0x499 [nfsd]
   [<cc893ede>] nfsd_create_v3+0x31b/0x4ac [nfsd]
   [<cc8984a1>] nfsd3_proc_create+0x128/0x138 [nfsd]
   [<cc88f0d4>] nfsd_dispatch+0xc0/0x178 [nfsd]
   [<c033ec1d>] svc_process+0x3a5/0x5ed
   [<cc88f5ba>] nfsd+0x1a7/0x305 [nfsd]
   [<c0101005>] kernel_thread_helper+0x5/0xb
  DWARF2 unwinder stuck at kernel_thread_helper+0x5/0xb
  Leftover inexact backtrace:
   [<c0103b8b>] show_trace+0xd/0x10
   [<c0103c2f>] dump_stack+0x19/0x1b
   [<c012aa63>] __lock_acquire+0x77a/0x9a3
   [<c012af56>] lock_acquire+0x60/0x80
   [<c034ca9a>] __mutex_lock_slowpath+0xa7/0x20e
   [<c034cc1d>] mutex_lock+0x1c/0x1f
   [<cc892ad1>] nfsd_setattr+0x2c8/0x499 [nfsd]
   [<cc893ede>] nfsd_create_v3+0x31b/0x4ac [nfsd]
   [<cc8984a1>] nfsd3_proc_create+0x128/0x138 [nfsd]
   [<cc88f0d4>] nfsd_dispatch+0xc0/0x178 [nfsd]
   [<c033ec1d>] svc_process+0x3a5/0x5ed
   [<cc88f5ba>] nfsd+0x1a7/0x305 [nfsd]
   [<c0101005>] kernel_thread_helper+0x5/0xb

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Neil Brown <neilb@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-02 07:57:20 -07:00
..
9p
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
adfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
affs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
afs
[PATCH] BLOCK: Remove no-longer necessary linux/buffer_head.h inclusions [try #6]
2006-09-30 20:52:31 +02:00
autofs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
autofs4
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
befs
[PATCH] inode-diet: Eliminate i_blksize from the inode structure
2006-09-27 08:26:18 -07:00
bfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
cifs
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
coda
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
configfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
cramfs
[PATCH] cramfs: make cramfs_uncompress_exit() return void
2006-09-29 09:18:20 -07:00
debugfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
devpts
[PATCH] inode-diet: Eliminate i_blksize from the inode structure
2006-09-27 08:26:18 -07:00
efs
[PATCH] Really ignore kmem_cache_destroy return value
2006-09-27 08:26:10 -07:00
exportfs
[PATCH] NFS server subtree_check returns dubious value
2006-05-21 12:59:16 -07:00
ext2
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
ext3
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
fat
[PATCH] Remove readv/writev methods and use aio_read/aio_write instead
2006-10-01 00:39:28 -07:00
freevxfs
[PATCH] freevxfs: fix leak on error path
2006-09-29 09:18:20 -07:00
fuse
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
hfs
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
hfsplus
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
hostfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
hpfs
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
hppfs
[PATCH] inode-diet: Eliminate i_blksize from the inode structure
2006-09-27 08:26:18 -07:00
hugetlbfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
isofs
[PATCH] I/O Error attempting to read last partial block of a file in an ISO9660 file system
2006-09-29 09:18:15 -07:00
jbd
[PATCH] JBD: memory leak in "journal_init_dev()"
2006-09-29 09:18:03 -07:00
jffs
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
jffs2
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
jfs
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
lockd
[PATCH] knfsd: Correctly handle error condition from lockd_up
2006-10-02 07:57:18 -07:00
minix
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
msdos
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
ncpfs
[PATCH] Move ncpfs 32bit compat ioctl to ncpfs
2006-10-01 00:39:23 -07:00
nfs
[PATCH] knfsd: Drop 'serv' option to svc_recv and svc_process
2006-10-02 07:57:18 -07:00
nfs_common
[PATCH] nfsacl: Solaris VxFS compatibility fix
2005-10-11 09:46:54 -07:00
nfsd
[PATCH] nfsd: lockdep annotation
2006-10-02 07:57:20 -07:00
nls
[PATCH] Remove NULL check in register_nls()
2006-10-02 07:57:14 -07:00
ntfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
ocfs2
[PATCH] r/o bind mounts: clean up OCFS2 nlink handling
2006-10-01 00:39:30 -07:00
openpromfs
Move several *_SUPER_MAGIC symbols to include/linux/magic.h.
2006-09-24 11:13:19 -04:00
partitions
[PATCH] fs/partitions: Conversion to generic boolean
2006-10-01 00:39:19 -07:00
proc
[PATCH] Define struct pspace
2006-10-02 07:57:15 -07:00
qnx4
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
ramfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
reiserfs
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
romfs
[PATCH] Really ignore kmem_cache_destroy return value
2006-09-27 08:26:10 -07:00
smbfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
sysfs
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
sysv
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
udf
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
ufs
[PATCH] r/o bind mounts: unlink: monitor i_nlink
2006-10-01 00:39:30 -07:00
vfat
[PATCH] r/o bind mounts: monitor zeroing of i_nlink
2006-10-01 00:39:30 -07:00
xfs
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
aio.c
[PATCH] Add vector AIO support
2006-10-01 00:39:29 -07:00
attr.c
[PATCH] capable/capability.h (fs/)
2006-01-11 18:42:13 -08:00
bad_inode.c
[PATCH] Remove readv/writev methods and use aio_read/aio_write instead
2006-10-01 00:39:28 -07:00
binfmt_aout.c
[PATCH] Require mmap handler for a.out executables
2006-09-29 09:18:08 -07:00
binfmt_elf_fdpic.c
[PATCH] elf_fdpic_core_dump: don't take tasklist_lock
2006-09-29 09:18:14 -07:00
binfmt_elf.c
[PATCH] Support piping into commands in /proc/sys/kernel/core_pattern
2006-10-01 00:39:33 -07:00
binfmt_em86.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
binfmt_flat.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
binfmt_misc.c
[PATCH] Fix unserialized task->files changing
2006-09-29 09:18:12 -07:00
binfmt_script.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
binfmt_som.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
bio.c
[PATCH] Update axboe@suse.de email address
2006-09-30 20:52:34 +02:00
block_dev.c
[PATCH] Streamline generic_file_* interfaces and filemap cleanups
2006-10-01 00:39:28 -07:00
buffer.c
[PATCH] BLOCK: Move functions out of buffer code [try #6]
2006-09-30 20:31:19 +02:00
char_dev.c
[PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6]
2006-09-30 20:52:18 +02:00
compat_ioctl.c
[PATCH] Move ncpfs 32bit compat ioctl to ncpfs
2006-10-01 00:39:23 -07:00
compat.c
[PATCH] csa: convert CONFIG tag for extended accounting routines
2006-10-01 00:39:29 -07:00
dcache.c
[PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6]
2006-09-30 20:52:18 +02:00
dcookies.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
direct-io.c
[PATCH] lockdep: annotate direct io
2006-07-03 15:27:06 -07:00
dnotify.c
[PATCH] file: modify struct fown_struct to use a struct pid
2006-10-02 07:57:14 -07:00
dquot.c
[PATCH] dquot: add proper locking when using current->signal->tty
2006-09-29 09:18:14 -07:00
drop_caches.c
[PATCH] drop-pagecache
2006-01-08 20:12:40 -08:00
eventpoll.c
[PATCH] inode-diet: Eliminate i_blksize from the inode structure
2006-09-27 08:26:18 -07:00
exec.c
[PATCH] Support piping into commands in /proc/sys/kernel/core_pattern
2006-10-01 00:39:33 -07:00
fcntl.c
[PATCH] file: Add locking to f_getown
2006-10-02 07:57:15 -07:00
fifo.c
[PATCH] pipe.c/fifo.c code cleanups
2006-04-11 13:53:33 +02:00
file_table.c
[PATCH] file: modify struct fown_struct to use a struct pid
2006-10-02 07:57:14 -07:00
file.c
[PATCH] expand_fdtable(): remove pointless unlock+lock
2006-09-29 09:18:25 -07:00
filesystems.c
[PATCH] Ban register_filesystem(NULL);
2006-09-29 09:18:20 -07:00
fs-writeback.c
[PATCH] BLOCK: Remove dependence on existence of blockdev_superblock [try #6]
2006-09-30 20:52:26 +02:00
generic_acl.c
[PATCH] Generic infrastructure for acls
2006-09-29 09:18:24 -07:00
inode.c
[PATCH] fs/inode.c tweaks
2006-10-02 07:57:14 -07:00
inotify_user.c
[PATCH] inotify: fix deadlock found by lockdep
2006-07-31 13:28:41 -07:00
inotify.c
[PATCH] inotify (4/5): allow watch removal from event handler
2006-06-20 05:25:19 -04:00
internal.h
[PATCH] CONFIG_BLOCK internal.h cleanups
2006-09-30 20:52:32 +02:00
ioctl.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
ioprio.c
[PATCH] Update axboe@suse.de email address
2006-09-30 20:52:34 +02:00
Kconfig
[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
2006-09-30 20:52:31 +02:00
Kconfig.binfmt
[PATCH] frv: suppress configuration of certain features for FRV
2006-01-08 20:13:36 -08:00
libfs.c
[PATCH] r/o bind mount prepwork: inc_nlink() helper
2006-10-01 00:39:30 -07:00
locks.c
[PATCH] file: modify struct fown_struct to use a struct pid
2006-10-02 07:57:14 -07:00
Makefile
[PATCH] Create fs/utimes.c
2006-10-01 00:39:19 -07:00
mbcache.c
[PATCH] mbcache: add lock annotation for __mb_cache_entry_release_unlock()
2006-09-29 09:18:07 -07:00
mpage.c
[PATCH] BLOCK: Dissociate generic_writepages() from mpage stuff [try #6]
2006-09-30 20:52:26 +02:00
namei.c
[PATCH] r/o bind mount prepwork: move open_namei()'s vfs_create()
2006-10-01 00:39:30 -07:00
namespace.c
[PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6]
2006-09-30 20:52:18 +02:00
nfsctl.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
no-block.c
[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
2006-09-30 20:52:31 +02:00
open.c
[PATCH] r/o bind mounts: prepare for write access checks: collapse if()
2006-10-01 00:39:30 -07:00
pipe.c
[PATCH] Some cleanup in the pipe code
2006-10-01 00:39:33 -07:00
pnode.c
[PATCH] core: use list_move()
2006-06-26 09:58:17 -07:00
pnode.h
[PATCH] unbindable mounts
2005-11-07 18:18:11 -08:00
posix_acl.c
[PATCH] kmemdup: some users
2006-10-01 00:39:19 -07:00
quota_v1.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
quota_v2.c
[PATCH] sem2mutex: quota
2006-03-23 07:38:11 -08:00
quota.c
[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
2006-09-30 20:52:31 +02:00
read_write.c
[PATCH] Add vector AIO support
2006-10-01 00:39:29 -07:00
read_write.h
[PATCH] Remove readv/writev methods and use aio_read/aio_write instead
2006-10-01 00:39:28 -07:00
readdir.c
[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem
2006-01-09 15:59:24 -08:00
select.c
[PATCH] enforce RLIMIT_NOFILE in poll()
2006-09-29 09:18:23 -07:00
seq_file.c
[PATCH] sem2mutex: fs/seq_file.c
2006-03-23 07:38:12 -08:00
splice.c
[PATCH] Update axboe@suse.de email address
2006-09-30 20:52:34 +02:00
stat.c
[PATCH] inode-diet: Eliminate i_blksize from the inode structure
2006-09-27 08:26:18 -07:00
super.c
[PATCH] BLOCK: Make it possible to disable the block layer [try #6]
2006-09-30 20:52:31 +02:00
sync.c
[PATCH] BLOCK: Move functions out of buffer code [try #6]
2006-09-30 20:31:19 +02:00
utimes.c
[PATCH] Create fs/utimes.c
2006-10-01 00:39:19 -07:00
xattr_acl.c
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
xattr.c
[PATCH] log more info for directory entry change events
2006-06-20 05:25:28 -04:00