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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2006-12-08 02:39:38 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-08 08:29:01 -0800
commit4b75f78edcab291eb29fe9a205cbf7b80c1c644f (patch)
tree810267067c330304c9870d9d631b0ec7f6bd675a /fs
parentdf61bec3ae8983984070db24ae481fe7297a6dff (diff)
downloadlinux-4b75f78edcab291eb29fe9a205cbf7b80c1c644f.tar.bz2
[PATCH] lockdep: annotate nfsd4 recover code
> ============================================= > [ INFO: possible recursive locking detected ] > 2.6.18-1.2724.lockdepPAE #1 > --------------------------------------------- > nfsd/6884 is trying to acquire lock: > (&inode->i_mutex){--..}, at: [<c04811e5>] vfs_rmdir+0x73/0xf4 > > but task is already holding lock: > (&inode->i_mutex){--..}, at: [<f8dfa621>] > nfsd4_clear_clid_dir+0x1f/0x3d [nfsd] > > other info that might help us debug this: > 3 locks held by nfsd/6884: > #0: (hash_sem){----}, at: [<f8de05eb>] nfsd+0x181/0x2ea [nfsd] > #1: (client_mutex){--..}, at: [<f8df6d19>] > nfsd4_setclientid_confirm+0x3b/0x2cf [nfsd] > #2: (&inode->i_mutex){--..}, at: [<f8dfa621>] > nfsd4_clear_clid_dir+0x1f/0x3d [nfsd] > > stack backtrace: > [<c040524d>] dump_trace+0x69/0x1af > [<c04053ab>] show_trace_log_lvl+0x18/0x2c > [<c040595f>] show_trace+0xf/0x11 > [<c0405a53>] dump_stack+0x15/0x17 > [<c043ca7a>] __lock_acquire+0x110/0x9b6 > [<c043d91e>] lock_acquire+0x5c/0x7a > [<c061a41b>] __mutex_lock_slowpath+0xde/0x234 > [<c04811e5>] vfs_rmdir+0x73/0xf4 > [<f8dfa62b>] nfsd4_clear_clid_dir+0x29/0x3d [nfsd] > [<f8dfa733>] nfsd4_remove_clid_dir+0xb8/0xf8 [nfsd] > [<f8df6e90>] nfsd4_setclientid_confirm+0x1b2/0x2cf [nfsd] > [<f8def19a>] nfsd4_proc_compound+0x137a/0x166c [nfsd] > [<f8de00d5>] nfsd_dispatch+0xc5/0x180 [nfsd] > [<f8d09d83>] svc_process+0x3bd/0x631 [sunrpc] > [<f8de0604>] nfsd+0x19a/0x2ea [nfsd] > [<c0404e27>] kernel_thread_helper+0x7/0x10 > DWARF2 unwinder stuck at kernel_thread_helper+0x7/0x10 > Leftover inexact backtrace: > ======================= Some nesting annotation to the nfsd4 recovery code. The vfs operations called will take dentry->d_inode->i_mutex. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfsd/nfs4recover.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 81b8565d3837..c7774e3a9469 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -259,7 +259,7 @@ nfsd4_remove_clid_file(struct dentry *dir, struct dentry *dentry)
printk("nfsd4: non-file found in client recovery directory\n");
return -EINVAL;
}
- mutex_lock(&dir->d_inode->i_mutex);
+ mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
status = vfs_unlink(dir->d_inode, dentry);
mutex_unlock(&dir->d_inode->i_mutex);
return status;