Messages in this thread | | | Date | Wed, 03 Nov 2004 02:04:15 +0100 | From | Remi Colinet <> | Subject | Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.6] |
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Remi Colinet wrote:
> Ingo Molnar wrote: > >> i've uploaded a fixed kernel (-V0.6.8) to : >> >> http://redhat.com/~mingo/realtime-preempt/ >> <http://redhat.com/%7Emingo/realtime-preempt/> >>
Without DEBUG_PAGE_ALLOC, the kernel (V0.6.9) is fairly stable. I can even feel the difference of latency under KDE, between the stock kernel and V0.6.9. :-)
I like this patch.
Remi
> I have thousands of the following BUG with V0.6.9 > > Nov 2 23:10:14 tigre02 kernel: printk: 6553 messages suppressed. > Nov 2 23:10:14 tigre02 kernel: BUG: using smp_processor_id() in > preemptible [00000001] code: udev/1159 > Nov 2 23:10:14 tigre02 kernel: caller is store_stackinfo+0x5d/0xb0 > Nov 2 23:10:14 tigre02 kernel: [<c0106503>] dump_stack+0x23/0x30 (20) > Nov 2 23:10:14 tigre02 kernel: [<c011f177>] smp_processor_id+0xb7/0xc0 > (32) > Nov 2 23:10:14 tigre02 kernel: [<c0159a5d>] store_stackinfo+0x5d/0xb0 > (28) > Nov 2 23:10:14 tigre02 kernel: [<c015b6ba>] > cache_free_debugcheck+0x1aa/0x390 (52) > Nov 2 23:10:14 tigre02 kernel: [<c015c656>] kmem_cache_free+0x46/0xf0 > (32) > Nov 2 23:10:14 tigre02 kernel: [<c01731f1>] sys_open+0x81/0xb0 (32) > Nov 2 23:10:14 tigre02 kernel: [<c0105561>] > sysenter_past_esp+0x52/0x71 (-8124) > Nov 2 23:10:14 tigre02 kernel: --------------------------- > Nov 2 23:10:14 tigre02 kernel: | preempt count: 00000002 ] > Nov 2 23:10:14 tigre02 kernel: | 2-level deep critical section nesting: > Nov 2 23:10:14 tigre02 kernel: ---------------------------------------- > Nov 2 23:10:14 tigre02 kernel: .. [<c011f11f>] .... > smp_processor_id+0x5f/0xc0 > Nov 2 23:10:14 tigre02 kernel: .....[<c0159a5d>] .. ( <= > store_stackinfo+0x5d/0xb0) > Nov 2 23:10:14 tigre02 kernel: .. [<c014083d>] .... > print_traces+0x1d/0x60 > Nov 2 23:10:14 tigre02 kernel: .....[<c0106503>] .. ( <= > dump_stack+0x23/0x30)
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