[Xen-devel] Backtrace in xen/next-2.6.38 when running guest

[M A Young <m.a.young@xxxxxxxxxxxx>]

I get backtraces from the dom0 kernel when running a guest with networking 
(via netback) enabled such as the one below (there are some slight 
variations but the first two lines and most of the rest of the contents 
are the same).
        Michael Young

BUG: sleeping function called from invalid context at mm/page_alloc.c:2190
in_atomic(): 1, irqs_disabled(): 0, pid: 0, name: swapper
Pid: 0, comm: swapper Not tainted 2.6.38-0.rc3.git0.1.xendom0.fc15.x86_64 
#1
Call Trace:
 <IRQ>  [<ffffffff81047b44>] ? __might_sleep+0xeb/0xf0
 [<ffffffff810dea22>] ? __alloc_pages_nodemask+0x98/0x772
 [<ffffffff81470426>] ? _raw_spin_lock+0xe/0x10
 [<ffffffffa02b3473>] ? ieee80211_rx_handlers+0x1773/0x17fe [mac80211]
 [<ffffffffa022c80e>] ? net_tx_build_gops+0x3e2/0x94d [xen_netback]
 [<ffffffff810066d5>] ? xen_force_evtchn_callback+0xd/0xf
 [<ffffffff81006c72>] ? check_events+0x12/0x20
 [<ffffffff81112e1c>] ? __kmalloc_node_track_caller+0xf8/0x118
 [<ffffffffa022c80e>] ? net_tx_build_gops+0x3e2/0x94d [xen_netback]
 [<ffffffff81108313>] ? alloc_pages_current+0xb6/0xd0
 [<ffffffff813b5047>] ? __alloc_skb+0x8d/0x133
 [<ffffffffa022bd1b>] ? netif_alloc_page.isra.14+0x1e/0x54 [xen_netback]
 [<ffffffffa022c93f>] ? net_tx_build_gops+0x513/0x94d [xen_netback]
 [<ffffffff8102abf9>] ? pvclock_clocksource_read+0x48/0xb7
 [<ffffffff81006a3a>] ? xen_vcpuop_set_next_event+0x51/0x63
 [<ffffffff8107a4a3>] ? clockevents_program_event+0x8e/0x90
 [<ffffffff8107b4b7>] ? tick_dev_program_event+0x36/0xf3
 [<ffffffffa022cd97>] ? net_tx_action+0x1e/0x590 [xen_netback]
 [<ffffffff8105a1ed>] ? arch_local_irq_restore+0xb/0xd
 [<ffffffff810066d5>] ? xen_force_evtchn_callback+0xd/0xf
 [<ffffffff81006c72>] ? check_events+0x12/0x20
 [<ffffffff8105a6d5>] ? tasklet_action+0x7f/0xd2
 [<ffffffff8105b090>] ? __do_softirq+0xd2/0x19d
 [<ffffffff81006c72>] ? check_events+0x12/0x20
 [<ffffffff8100aadc>] ? call_softirq+0x1c/0x30
 [<ffffffff8100c121>] ? do_softirq+0x46/0x81
 [<ffffffff8105b214>] ? irq_exit+0x49/0x8b
 [<ffffffff812a981b>] ? xen_evtchn_do_upcall+0x31/0x3e
 [<ffffffff8100ab2e>] ? xen_do_hypervisor_callback+0x1e/0x30
 <EOI>  [<ffffffff810013aa>] ? hypercall_page+0x3aa/0x1000
 [<ffffffff810013aa>] ? hypercall_page+0x3aa/0x1000
 [<ffffffff81006690>] ? xen_safe_halt+0x10/0x18
 [<ffffffff81010d46>] ? default_idle+0x4e/0x86
 [<ffffffff8100831d>] ? cpu_idle+0xa1/0xdb
 [<ffffffff81006c19>] ? xen_irq_enable_direct_end+0x0/0x7
 [<ffffffff8145a95f>] ? cpu_bringup_and_idle+0x13/0x15


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