Displaying 5 results from an estimated 5 matches for "cpu_hotplug_lock".
2018 Aug 07
1
[PATCH net-next] net: allow to call netif_reset_xps_queues() under cpu_read_lock
...s an ability to call __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);
loc...
2018 Jul 26
2
net-next boot error
...cking detected
+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_...
2018 Jul 26
2
net-next boot error
...cking detected
+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_...
2018 Jul 26
0
net-next boot error
...is 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...
2007 Feb 14
9
DomU crash during migration when suspending source domain
Just run into an odd DomU crash doing live migration of a 4-VCPU domain (with 3.0.4 but the code looks the same in 2.6.18/unstable to me) - the actual panic is attached at the end of this, but the bottom line is that the code in cache_remove_shared_cpu_map (in arch/i385/kernel/cpu/intel_cacheinfo.c) is attempting to clean up the cache info for a processor that does not yet have this info setup -