Displaying 4 results from an estimated 4 matches for "rw_sem".
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rw_sema
2018 Aug 07
1
[PATCH net-next] net: allow to call netif_reset_xps_queues() under cpu_read_lock
...all __netif_set_xps_queue under
cpu_read_lock().
============================================
WARNING: possible recursive locking detected
4.18.0-rc3-next-20180703+ #1 Not tainted
--------------------------------------------
swapper/0/1 is trying to acquire lock:
00000000cf973d46 (cpu_hotplug_lock.rw_sem){++++}, at: static_key_slow_inc+0xe/0x20
but task is already holding lock:
00000000cf973d46 (cpu_hotplug_lock.rw_sem){++++}, at: init_vqs+0x513/0x5a0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(cpu_hotplug_lock.rw_sem);
lock(cpu_h...
2018 Jul 26
2
net-next boot error
...Tetsuo, perhaps this boot lockdep problem then disables lockdep for
actual testing. I think lockdep should respect panic_on_warn.
> 4.18.0-rc6+ #141 Not tainted
> --------------------------------------------
> swapper/0/1 is trying to acquire lock:
> (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at:
> static_key_slow_inc+0x12/0x30 kernel/jump_label.c:124
>
> but task is already holding lock:
> (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at: get_online_cpus
> include/linux/cpu.h:126 [inline]
> (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at: init_vqs+0xe...
2018 Jul 26
2
net-next boot error
...Tetsuo, perhaps this boot lockdep problem then disables lockdep for
actual testing. I think lockdep should respect panic_on_warn.
> 4.18.0-rc6+ #141 Not tainted
> --------------------------------------------
> swapper/0/1 is trying to acquire lock:
> (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at:
> static_key_slow_inc+0x12/0x30 kernel/jump_label.c:124
>
> but task is already holding lock:
> (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at: get_online_cpus
> include/linux/cpu.h:126 [inline]
> (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at: init_vqs+0xe...
2018 Jul 26
0
net-next boot error
...roblem then disables lockdep for
> actual testing. I think lockdep should respect panic_on_warn.
>
>
> > 4.18.0-rc6+ #141 Not tainted
> > --------------------------------------------
> > swapper/0/1 is trying to acquire lock:
> > (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at:
> > static_key_slow_inc+0x12/0x30 kernel/jump_label.c:124
> >
> > but task is already holding lock:
> > (____ptrval____) (cpu_hotplug_lock.rw_sem){++++}, at: get_online_cpus
> > include/linux/cpu.h:126 [inline]
> > (____ptrval____) (cpu_hotplug_lock.r...