Description of problem:
I have no idea as it came up in an alert so I clicked on it and followed the directions.

Additional info:
reporter:       libreport-2.1.9
WARNING: at kernel/smp.c:461 smp_call_function_many+0xbd/0x260()
Hardware name: PowerEdge R710
Modules linked in: xfs mgag200 i2c_algo_bit drm_kms_helper ttm crc32c_intel drm ghash_clmulni_intel i2c_core megaraid_sas
Pid: 145, comm: kworker/3:1 Not tainted 3.6.10-4.fc18.x86_64 #1
Call Trace:
 [<ffffffff8105c8df>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff8105c93a>] warn_slowpath_null+0x1a/0x20
 [<ffffffff810b9a0d>] smp_call_function_many+0xbd/0x260
 [<ffffffff8104b2f0>] ? leave_mm+0x60/0x60
 [<ffffffff8104b2f0>] ? leave_mm+0x60/0x60
 [<ffffffff810b9c42>] smp_call_function+0x22/0x30
 [<ffffffff810b9db8>] on_each_cpu+0x28/0x70
 [<ffffffff8104b81a>] flush_tlb_kernel_range+0x4a/0x70
 [<ffffffff811624d4>] __purge_vmap_area_lazy+0x164/0x1c0
 [<ffffffff8116308e>] free_vmap_area_noflush+0x5e/0x60
 [<ffffffff8116425f>] remove_vm_area+0x3f/0xb0
 [<ffffffff811643ae>] __vunmap+0x2e/0x110
 [<ffffffff811644c5>] vunmap+0x35/0x40
 [<ffffffffa00fe165>] ttm_bo_kunmap+0xb5/0xd0 [ttm]
 [<ffffffffa0052ff0>] mga_dirty_update+0xf0/0x170 [mgag200]
 [<ffffffffa00530a8>] mga_imageblit+0x38/0x50 [mgag200]
 [<ffffffff813325b5>] bit_putcs+0x315/0x580
 [<ffffffffa0052fcf>] ? mga_dirty_update+0xcf/0x170 [mgag200]
 [<ffffffffa00530a8>] ? mga_imageblit+0x38/0x50 [mgag200]
 [<ffffffff81333227>] ? soft_cursor+0x1d7/0x280
 [<ffffffff8132c9d0>] ? get_color.isra.14+0x40/0x150
 [<ffffffff8132e5b3>] fbcon_putcs+0x133/0x170
 [<ffffffff813322a0>] ? bit_clear_margins+0x180/0x180
 [<ffffffff8132e8df>] fbcon_redraw.isra.21+0x18f/0x200
 [<ffffffff813304db>] fbcon_scroll+0x1db/0xd10
 [<ffffffff8139ccc3>] scrup+0x113/0x120
 [<ffffffff8139cd70>] lf+0x70/0x80
 [<ffffffff8139dadc>] vt_console_print+0x27c/0x3a0
 [<ffffffff8105d5a9>] call_console_drivers.constprop.15+0x99/0x100
 [<ffffffff8105e613>] console_unlock+0x403/0x440
 [<ffffffff81332920>] ? bit_clear+0x100/0x100
 [<ffffffff8132cb48>] fb_flashcursor+0x68/0x160
 [<ffffffff81078ca7>] process_one_work+0x147/0x4a0
 [<ffffffff8132cae0>] ? get_color.isra.14+0x150/0x150
 [<ffffffff8107aa1e>] worker_thread+0x15e/0x480
 [<ffffffff8107a8c0>] ? manage_workers+0x2f0/0x2f0
 [<ffffffff8107fde3>] kthread+0x93/0xa0
 [<ffffffff8162cb84>] kernel_thread_helper+0x4/0x10
 [<ffffffff8107fd50>] ? kthread_freezable_should_stop+0x70/0x70
 [<ffffffff8162cb80>] ? gs_change+0x13/0x13

Potential duplicate: bug 920762