Comment 2 for bug 824520

[ 1992.564993] WARNING: at /build/buildd/linux-2.6.38/arch/x86/kernel/apic/ipi.c:109 default_send_IPI_mask_logical+0xb1/0xf0()
[ 1992.567444] Hardware name: PowerEdge R210 II
[ 1992.568467] empty IPI mask
[ 1992.569043] Modules linked in: fat iptable_filter ip_tables x_tables vesafb dcdbas joydev ghes hed lp parport usbhid hid ahci libahci bnx2 mpt2sas scsi_transport_sas raid_class [last unloaded: econet]
[ 1992.573566] Pid: 28295, comm: mtest01 Not tainted 2.6.38-11-generic-pae #48-Ubuntu
[ 1992.575299] Call Trace:
[ 1992.575824] [<c1058d82>] ? warn_slowpath_common+0x72/0xa0
[ 1992.577017] [<c102c591>] ? default_send_IPI_mask_logical+0xb1/0xf0
[ 1992.578451] [<c102c591>] ? default_send_IPI_mask_logical+0xb1/0xf0
[ 1992.579877] [<c1058e53>] ? warn_slowpath_fmt+0x33/0x40
[ 1992.581040] [<c102c591>] ? default_send_IPI_mask_logical+0xb1/0xf0
[ 1992.582411] [<c102a0c5>] ? native_send_call_func_ipi+0x45/0x60
[ 1992.583701] [<c108cac6>] ? smp_call_function_many+0x136/0x230
[ 1992.584970] [<c10f2130>] ? drain_local_pages+0x0/0x20
[ 1992.586090] [<c10f2130>] ? drain_local_pages+0x0/0x20
[ 1992.587204] [<c108cbe4>] ? smp_call_function+0x24/0x30
[ 1992.588337] [<c108cc0d>] ? on_each_cpu+0x1d/0x50
[ 1992.589355] [<c10efdc9>] ? drain_all_pages+0x19/0x20
[ 1992.590453] [<c10f26a5>] ? __alloc_pages_nodemask+0x3f5/0x710
[ 1992.591723] [<c11076af>] ? do_anonymous_page+0x16f/0x340
[ 1992.592895] [<c110b2be>] ? handle_pte_fault+0x2be/0x2f0
[ 1992.620715] [<c110ed19>] ? vma_merge+0xf9/0x2b0
[ 1992.648667] [<c103cb9c>] ? kmap_atomic_prot+0x4c/0x120
[ 1992.677045] [<c110bf59>] ? handle_mm_fault+0x109/0x1b0
[ 1992.704961] [<c1535900>] ? do_page_fault+0x0/0x490
[ 1992.732356] [<c1535a5e>] ? do_page_fault+0x15e/0x490
[ 1992.758833] [<c1110573>] ? sys_mmap_pgoff+0x73/0x1d0
[ 1992.758837] [<c103bba2>] ? smp_invalidate_interrupt+0x82/0xe0
[ 1992.758841] [<c1535900>] ? do_page_fault+0x0/0x490
[ 1992.758843] [<c1532c6f>] ? error_code+0x67/0x6c
[ 1992.758847] ---[ end trace e75974f1ed6ea8a8 ]---