Messages in this thread | | | Date | Tue, 12 Oct 2004 11:53:39 +0200 | From | Ingo Molnar <> | Subject | Re: [patch] VP-2.6.9-rc4-mm1-T6 |
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* Ingo Molnar <mingo@elte.hu> wrote:
> one more warning wrt. PREEMPT_REALTIME: if this option is enabled then > it is not safe to make interrupts non-threaded via > /proc/irq/*/*/threaded. If you need to turn an interrupt into a > high-prio event then its irq thread should be set to RT priority via > 'chrt'. (-T7 will turn off /proc/irq/*/*/threaded altogether, to make > sure it's not set accidentally.)
in fact i've re-uploaded a new version of the -T6 patch to disable direct interrupts under PREEMPT_REALTIME kernels. The only exception is IRQ1 on PCs (the keyboard irq), which can be useful for debugging purposes (SysRq, etc.). I turned the keyboard related locks into raw spinlocks to make this safe.
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