Re: [patch] voluntary-preempt-2.6.9-rc2-mm4-S7

[Lee Revell]

On Sun, 2004-10-03 at 15:57, Ingo Molnar wrote:
> do you still have the stacktrace too that went to the syslog? What
> codepath called _mmx_memcpy()?
> 

Here is an almost identical one (it's even exactly 507 usecs!).  This
and the one I sent previously were apparently caused by switching from X
to a text console and back. 

Sep  2 16:13:49 krustophenia kernel: (events/0/3): new 507 us maximum-latency critical section.
Sep  2 16:13:49 krustophenia kernel:  => started at: <kernel_fpu_begin+0x15/0x70>
Sep  2 16:13:49 krustophenia kernel:  => ended at:   <_mmx_memcpy+0x13a/0x180>
Sep  2 16:13:49 krustophenia kernel:  [check_preempt_timing+259/464] check_preempt_timing+0x103/0x1d0
Sep  2 16:13:49 krustophenia kernel:  [_mmx_memcpy+314/384] _mmx_memcpy+0x13a/0x180
Sep  2 16:13:49 krustophenia kernel:  [sub_preempt_count+70/96] sub_preempt_count+0x46/0x60
Sep  2 16:13:49 krustophenia kernel:  [sub_preempt_count+70/96] sub_preempt_count+0x46/0x60
Sep  2 16:13:49 krustophenia kernel:  [_mmx_memcpy+314/384] _mmx_memcpy+0x13a/0x180
Sep  2 16:13:49 krustophenia kernel:  [vgacon_save_screen+120/128] vgacon_save_screen+0x78/0x80
Sep  2 16:13:49 krustophenia kernel:  [redraw_screen+411/560] redraw_screen+0x19b/0x230
Sep  2 16:13:49 krustophenia kernel:  [complete_change_console+44/224] complete_change_console+0x2c/0xe0
Sep  2 16:13:49 krustophenia kernel:  [console_callback+258/272] console_callback+0x102/0x110
Sep  2 16:13:49 krustophenia kernel:  [worker_thread+422/624] worker_thread+0x1a6/0x270
Sep  2 16:13:49 krustophenia kernel:  [console_callback+0/272] console_callback+0x0/0x110
Sep  2 16:13:49 krustophenia kernel:  [default_wake_function+0/32] default_wake_function+0x0/0x20
Sep  2 16:13:49 krustophenia kernel:  [schedule+718/1360] schedule+0x2ce/0x550
Sep  2 16:13:49 krustophenia kernel:  [default_wake_function+0/32] default_wake_function+0x0/0x20
Sep  2 16:13:49 krustophenia kernel:  [schedule+718/1360] schedule+0x2ce/0x550
Sep  2 16:13:49 krustophenia kernel:  [kthread+180/192] kthread+0xb4/0xc0
Sep  2 16:13:49 krustophenia kernel:  [worker_thread+0/624] worker_thread+0x0/0x270
Sep  2 16:13:49 krustophenia kernel:  [kthread+0/192] kthread+0x0/0xc0
Sep  2 16:13:49 krustophenia kernel:  [kernel_thread_helper+5/16] kernel_thread_helper+0x5/0x10

Lee

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