Re: [patch] preempt-timing-on-2.6.8-rc2-O2

Lee Revell
2004-08-08T02:31:14Z

On Mon, 2004-08-02 at 06:51, Ingo Molnar wrote:
> Newest patch at:
>
> http://redhat.com/~mingo/voluntary-preempt/preempt-timing-on-2.6.8-rc2-O2
>

I get a *lot* of these:

(swapper/0): 996us non-preemptible critical section violated 100 us
preempt threshold starting at schedule+0x55/0x5a0 and ending at
do_IRQ+0x110/0x180
[<c0106717>] dump_stack+0x17/0x20
[<c0113eec>] dec_preempt_count+0x3c/0x50
[<c0107a20>] do_IRQ+0x110/0x180
[<c01062d8>] common_interrupt+0x18/0x20
[<c0104222>] cpu_idle+0x32/0x50
[<c030a782>] start_kernel+0x1a2/0x1f0
[<c010019f>] 0xc010019f

This has to be a false positive, because if there were really ~1ms
non-preemptible critical sections all over the place I would be getting
xruns.

Lee