Hi maintainer,and stranger v5.4-rt kernel, there some BUGs error:
[ 29.286213] BUG: workqueue leaked lock or atomic: kworker/u8:0/0x00000000/7
last function: rpc_async_schedule
[ 29.286215] 9 locks held by kworker/u8:0/7:
[ 29.286217] #0: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286222] #1: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286226] #2: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286230] #3: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286241] #4: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286245] #5: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286249] #6: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286253] #7: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286258] #8: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286262] CPU: 2 PID: 7 Comm: kworker/u8:0 Tainted: G W 5.4.107-rt44-yocto-preempt-rt #1
[ 29.286263] Hardware name: Intel Corporation NUC7i5DNKE/NUC7i5DNB, BIOS DNKBLi5v.86A.0026.2017.0915.2016 09/15/2017
[ 29.286266] Workqueue: rpciod rpc_async_schedule
[ 29.286266] Call Trace:
[ 29.286268] show_stack+0x4e/0x52
[ 29.286272] dump_stack+0x7a/0xa4
[ 29.286276] process_one_work.cold+0x43/0x48
[ 29.286292] worker_thread+0x217/0x330
[ 29.286300] kthread+0x177/0x190
[ 29.286302] ? process_one_work+0x410/0x410
[ 29.286303] ? __kthread_parkme+0xc0/0xc0
[ 29.286310] ret_from_fork+0x3a/0x50
On 4/6/21 1:57 AM, Chuck Lever III wrote:
[Please note: This e-mail is from an EXTERNAL e-mail address]
On Mar 28, 2021, at 10:31 PM, jun.miao <jun.miao@xxxxxxxxxxxxx> wrote:
Hi maintainers
I find a BUG calltrace in v5.4-rt:
[ 29.286213] BUG: workqueue leaked lock or atomic: kworker/u8:0/0x00000000/7
last function: rpc_async_schedule
[ 29.286215] 9 locks held by kworker/u8:0/7:
[ 29.286217] #0: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286222] #1: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286226] #2: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286230] #3: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286241] #4: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286245] #5: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286249] #6: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286253] #7: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286258] #8: ffff953b5745c2f0 (&dev->qdisc_running_key){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 29.286262] CPU: 2 PID: 7 Comm: kworker/u8:0 Tainted: G W 5.4.107-rt44-yocto-preempt-rt #1
[ 29.286263] Hardware name: Intel Corporation NUC7i5DNKE/NUC7i5DNB, BIOS DNKBLi5v.86A.0026.2017.0915.2016 09/15/2017
[ 29.286266] Workqueue: rpciod rpc_async_schedule
[ 29.286266] Call Trace:
[ 29.286268] show_stack+0x4e/0x52
[ 29.286272] dump_stack+0x7a/0xa4
[ 29.286276] process_one_work.cold+0x43/0x48
[ 29.286292] worker_thread+0x217/0x330
[ 29.286300] kthread+0x177/0x190
[ 29.286302] ? process_one_work+0x410/0x410
[ 29.286303] ? __kthread_parkme+0xc0/0xc0
[ 29.286310] ret_from_fork+0x3a/0x50
When i git am this patch:
commit 1a33e10e4a95cb109ff1145098175df3113313ef
Author: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Date: Sat May 2 22:22:19 2020 -0700
net: partially revert dynamic lockdep key changes
The BUG also print:
BUG: workqueue leaked lock or atomic: kworker/u8:0/0x00000000/7
[ 28.869159] 000: last function: rpc_async_release
[ 28.869161] 000: 13 locks held by kworker/u8:0/7:
[ 28.869162] 000: #0: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869167] 000: #1: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869172] 000: #2: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869177] 000: #3: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869189] 000: #4: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869193] 000: #5: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869198] 000: #6: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869203] 000: #7: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869208] 000: #8: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869213] 000: #9: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869218] 000: #10: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869223] 000: #11: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869228] 000: #12: ffff90b817de42f0 (&(&sch->running)->seqcount){+.+.}, at: __dev_queue_xmit+0x32e/0x610
[ 28.869233] 000: CPU: 0 PID: 7 Comm: kworker/u8:0 Tainted: G W 5.4.107-rt44-yocto-preempt-rt #1
[ 28.869234] 000: Hardware name: Intel Corporation NUC7i5DNKE/NUC7i5DNB, BIOS DNKBLi5v.86A.0026.2017.0915.2016 09/15/2017
[ 28.869236] 000: Workqueue: nfsiod rpc_async_release
[ 28.869236] 000: Call Trace:
[ 28.869238] 000: show_stack+0x4e/0x52
[ 28.869242] 000: dump_stack+0x7a/0xa4
[ 28.869247] 000: process_one_work.cold+0x43/0x48
[ 28.869266] 000: worker_thread+0x53/0x330
[ 28.869275] 000: kthread+0x177/0x190
[ 28.869278] 000: ? process_one_work+0x410/0x410
[ 28.869279] 000: ? __kthread_parkme+0xc0/0xc0
[ 28.869286] 000: ret_from_fork+0x3a/0x50
Could you give me some advice about rpc_async_schedule() in sunrpc File ?
Thanks very much
Hello-
rpc_async_schedule() is part of the RPC client, whose maintainers
are Trond Myklebust and Anna Schumaker. Please post this WQ splat
to linux-nfs@xxxxxxxxxxxxxxx and Cc: Trond and Anna. Thanks!
--
Chuck Lever
