Thanks, that boots.
During boot I see this, apparently while mounting NFS filesystems:
[ 83.114812] ====================================
[ 83.133079] [ BUG: possible deadlock detected! ]
[ 83.146881] ------------------------------------
[ 83.160683] mount/3531 is trying to acquire lock:
[ 83.174745] (&inode->i_mutex){--..}, at: [<ffffffff804396df>] mutex_lock+0x22/0x27
[ 83.197835]
[ 83.197836] but task is already holding lock:
[ 83.215295] (&inode->i_mutex){--..}, at: [<ffffffff804396df>] mutex_lock+0x22/0x27
[ 83.238386]
[ 83.238387] which could potentially lead to deadlocks!
[ 83.258207]
[ 83.258207] other info that might help us debug this:
[ 83.277769] 2 locks held by mount/3531:
[ 83.289235] #0: (&s->s_umount#16){--..}, at: [<ffffffff8028c0b3>] sget+0x1a0/0x407
[ 83.312612] #1: (&inode->i_mutex){--..}, at: [<ffffffff804396df>] mutex_lock+0x22/0x27
[ 83.337025]
[ 83.337026] stack backtrace:
[ 83.350101]
[ 83.350101] Call Trace:
[ 83.361890] [<ffffffff80247b4e>] __lockdep_acquire+0x18a/0xad2
[ 83.379629] [<ffffffff804396df>] mutex_lock+0x22/0x27
[ 83.395038] [<ffffffff8024887d>] lockdep_acquire+0x82/0xa3
[ 83.411748] [<ffffffff80439450>] __mutex_lock_slowpath+0xfd/0x36a
[ 83.430273] [<ffffffff804396df>] mutex_lock+0x22/0x27
[ 83.445703] [<ffffffff880ce635>] :sunrpc:rpc_populate+0x43/0x141
[ 83.463934] [<ffffffff880cedb8>] :sunrpc:rpc_mkdir+0xb6/0x172
[ 83.481383] [<ffffffff802a1862>] mntput_no_expire+0x1b/0xb9
[ 83.498348] [<ffffffff802a989c>] simple_pin_fs+0xc3/0xd3
[ 83.514548] [<ffffffff880bf8c1>] :sunrpc:rpc_new_client+0x226/0x348
[ 83.533592] [<ffffffff880c06e0>] :sunrpc:rpc_create_client+0xc/0x3e
[ 83.552644] [<ffffffff88105e0c>] :nfs:nfs_get_sb+0x559/0x6e8
[ 83.569853] [<ffffffff8028b827>] vfs_kern_mount+0x8b/0x196
[ 83.586560] [<ffffffff8028b980>] do_kern_mount+0x3c/0x57
[ 83.602724] [<ffffffff802a3596>] do_mount+0x7dd/0x851
[ 83.618108] [<ffffffff80247240>] mark_lock+0x3b/0x4fc
[ 83.633520] [<ffffffff80262a2a>] get_page_from_freelist+0x34e/0x4cc
[ 83.652560] [<ffffffff802479a0>] trace_hardirqs_on+0x165/0x189
[ 83.670281] [<ffffffff80262a99>] get_page_from_freelist+0x3bd/0x4cc
[ 83.689324] [<ffffffff8043b461>] _spin_unlock_irqrestore+0x3f/0x47
[ 83.708109] [<ffffffff80262c2a>] __alloc_pages+0x82/0x33d
[ 83.724558] [<ffffffff802787ef>] alloc_pages_current+0xa0/0xa9
[ 83.742301] [<ffffffff803361fc>] _raw_spin_lock+0xc7/0x15d
[ 83.759012] [<ffffffff802a36a7>] sys_mount+0x9d/0xe9
[ 83.774160] [<ffffffff8043ab11>] trace_hardirqs_on_thunk+0x35/0x37
[ 83.792919] [<ffffffff80209652>] system_call+0x7e/0x83
- R.
-
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