[Xen-devel] Re: xenstored unsafe lock order detected, xlate_proc_name, evtchn_ioctl, port_user_lock

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Jun 07, 2010 at 09:50:13AM -0700, Jeremy Fitzhardinge wrote:
> On 06/07/2010 05:58 AM, Pasi Kärkkäinen wrote:
> > On Sun, Jun 06, 2010 at 09:54:01PM +0300, Pasi Kärkkäinen wrote:
> >   
> >> On Sun, Jun 06, 2010 at 10:41:04AM -0700, Jeremy Fitzhardinge wrote:
> >>     
> >>> On 06/06/2010 10:33 AM, Pasi Kärkkäinen wrote:
> >>>       
> >>>> Hello,
> >>>>
> >>>> I just tried the latest xen/stable-2.6.32.x kernel, ie. 2.6.32.15, with 
> >>>> Xen 4.0.0,
> >>>> and I got this:
> >>>>
> >>>> http://pasik.reaktio.net/xen/pv_ops-dom0-debug/log-2.6.32.15-pvops-dom0-xen-stable-x86_64.txt
> >>>>   
> >>>>         
> >>> Does this help?
> >>>
> >>>       
> >> It gave failing hunks so I had to manually apply it to 2.6.32.15, 
> >> but it seems to fix that issue. No "unsafe lock order" messages anymore.
> >>
> >>     
> > Hmm.. it seems I still get this:
> >   
> 
> OK, thanks.  Let me look at it; that was a first cut patch I did the
> other day when I noticed the problem, but I hadn't got around to testing
> it myself.
> 

I just tried the latest xen/stable-2.6.32.16 (as of today), 
without any additional patches, and I get this:


device vif1.0 entered promiscuous mode
virbr0: topology change detected, propagating
virbr0: port 1(vif1.0) entering forwarding state
  alloc irq_desc for 1242 on node 0
  alloc kstat_irqs on node 0
  alloc irq_desc for 1241 on node 0
  alloc kstat_irqs on node 0
  alloc irq_desc for 1240 on node 0
  alloc kstat_irqs on node 0
blkback: ring-ref 8, event-channel 8, protocol 1 (x86_64-abi)
  alloc irq_desc for 1239 on node 0
  alloc kstat_irqs on node 0
vif1.0: no IPv6 routers present
  alloc irq_desc for 1238 on node 0
  alloc kstat_irqs on node 0
------------[ cut here ]------------
WARNING: at kernel/lockdep.c:2323 trace_hardirqs_on_caller+0xb7/0x135()
Hardware name: X7SB4/E
Modules linked in: ipt_MASQUERADE iptable_nat nf_nat bridge stp llc sunrpc 
ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 xen_gntdev 
xen_evtchn xenfs e1000e shpchp i2c_i801 pcspkr iTCO_wdt iTCO_vendor_support 
serio_raw joydev floppy usb_storage video output aic79xx scsi_transport_spi 
radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: 
scsi_wait_scan]
Pid: 23, comm: xenwatch Not tainted 2.6.32.16 #6
Call Trace:
 <IRQ>  [<ffffffff81059c41>] warn_slowpath_common+0x7c/0x94
 [<ffffffff8147896b>] ? _spin_unlock_irq+0x30/0x3c
 [<ffffffff81059c6d>] warn_slowpath_null+0x14/0x16
 [<ffffffff8108b186>] trace_hardirqs_on_caller+0xb7/0x135
 [<ffffffff8108b211>] trace_hardirqs_on+0xd/0xf
 [<ffffffff8147896b>] _spin_unlock_irq+0x30/0x3c
 [<ffffffff812c15d7>] add_to_net_schedule_list_tail+0x92/0x9b
 [<ffffffff812c1618>] netif_be_int+0x38/0xcd
 [<ffffffff810b8144>] handle_IRQ_event+0x53/0x119
 [<ffffffff810ba0e6>] handle_level_irq+0x7d/0xdf
 [<ffffffff812b6f45>] __xen_evtchn_do_upcall+0xe1/0x16e
 [<ffffffff812b74b8>] xen_evtchn_do_upcall+0x37/0x4c
 [<ffffffff81013f3e>] xen_do_hypervisor_callback+0x1e/0x30
 <EOI>  [<ffffffff8100940a>] ? hypercall_page+0x40a/0x100b
 [<ffffffff8100940a>] ? hypercall_page+0x40a/0x100b
 [<ffffffff812b9f9b>] ? notify_remote_via_evtchn+0x1e/0x44
 [<ffffffff814776a1>] ? __mutex_lock_common+0x36a/0x37b
 [<ffffffff812ba8b8>] ? xs_talkv+0x5c/0x174
 [<ffffffff812ba30c>] ? xb_write+0x16e/0x18a
 [<ffffffff812ba8c6>] ? xs_talkv+0x6a/0x174
 [<ffffffff81242b86>] ? kasprintf+0x38/0x3a
 [<ffffffff812bab15>] ? xs_single+0x3a/0x3c
 [<ffffffff812bb0f0>] ? xenbus_read+0x42/0x5b
 [<ffffffff812c3de4>] ? frontend_changed+0x655/0x681
 [<ffffffff812bc0e7>] ? xenbus_otherend_changed+0xe9/0x176
 [<ffffffff8100f34f>] ? xen_restore_fl_direct_end+0x0/0x1
 [<ffffffff8108d94e>] ? lock_release+0x198/0x1a5
 [<ffffffff812bc712>] ? frontend_changed+0x10/0x12
 [<ffffffff812ba63d>] ? xenwatch_thread+0x111/0x14c
 [<ffffffff81079d7a>] ? autoremove_wake_function+0x0/0x39
 [<ffffffff812ba52c>] ? xenwatch_thread+0x0/0x14c
 [<ffffffff81079aa8>] ? kthread+0x7f/0x87
 [<ffffffff81013dea>] ? child_rip+0xa/0x20
 [<ffffffff81013750>] ? restore_args+0x0/0x30
 [<ffffffff81013de0>] ? child_rip+0x0/0x20
---[ end trace b036c0423b0ee26a ]---
  alloc irq_desc for 1237 on node 0
  alloc kstat_irqs on node 0
device vif2.0 entered promiscuous mode


-- Pasi


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