Hit the below warning when enabling the CONFIG_DEBUG_LOCK_ALLOC,
__fuse_request_send == >
request_wait_answer == >
wait_event_freezable == >
try_to_freeze()
But here the inode->i_mutex is hold yet in vfs_readdir().
Could anyone give some help? Thanks.
[ 3148.552435] Freezing user space processes ... [ 3148.557781]
[ 3148.559505] =====================================
[ 3148.564803] [ BUG: du/21716 still has locks held! ]
[ 3148.570319] 3.10.16-261493-g1308ae2 #8 Tainted: G W O
[ 3148.586082] #0: (&type->i_mutex_dir_key#3){......}, at: [<c1341dc6>]
vfs_readdir+0x66/0xd0
[ 3148.595967]
[ 3148.595967] stack backtrace:
[ 3148.600875] CPU: 2 PID: 21716 Comm: du Tainted: G W O
3.10.16-261493-g1308ae2 #8
[ 3148.609973] d7e494e0 d7e494e0 cca6be78 c1b0fccb cca6be90 c12913f1 c1db2cc5
d7e497e4
[ 3148.618872] 000054d4 cca6beac cca6becc c1440d8b d7e494e0 f2557800 f12acedc
00000000
[ 3148.627747] 00000000 00000000 d7e494e0 c125f100 cca6beb8 cca6beb8 f12ace40
f2557800
[ 3148.636614] Call Trace:
[ 3148.639395] [<c1b0fccb>] dump_stack+0x16/0x18
[ 3148.644375] [<c12913f1>] debug_check_no_locks_held+0x91/0xa0
[ 3148.650862] [<c1440d8b>] __fuse_request_send+0x14b/0x320
[ 3148.656961] [<c125f100>] ? wake_up_bit+0x30/0x30
[ 3148.662242] [<c1440f71>] fuse_request_send+0x11/0x20
[ 3148.667941] [<c14455a9>] fuse_readdir+0x109/0x690
[ 3148.673327] [<c1341dc6>] ? vfs_readdir+0x66/0xd0
[ 3148.678636] [<c1b1bec5>] ? sub_preempt_count+0x45/0x60
[ 3148.684503] [<c1b15694>] ? mutex_lock_killable_nested+0x214/0x300
[ 3148.691457] [<c1341b60>] ? SyS_ioctl+0x90/0x90
[ 3148.696553] [<c1341dc6>] ? vfs_readdir+0x66/0xd0
[ 3148.701857] [<c1341b60>] ? SyS_ioctl+0x90/0x90
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