From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <451B92C8.9050802@domain.hid>
Date: Thu, 28 Sep 2006 11:15:52 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Adeos-main] [PATCH+HACK] optimise root stalling
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Philippe Gerum wrote:
> On Mon, 2006-09-25 at 09:35 +0200, Jan Kiszka wrote:
>=20
> This one won't work. We need to forcibly re-enable the hw IRQs upon roo=
t
> unstall requests, regardless of the fact that interrupts are pending in=

> the log; some code rely on this. E.g. Adeos/ppc over 2.4 would remain
> stuck in the delay calibration routine, but there are other more tricky=

> places where this would bite too.

But this would be ok?

#else  /* !CONFIG_SMP */
        __clear_bit(IPIPE_STALL_FLAG,
                    &ipipe_root_domain->cpudata[cpuid].status);

       if (unlikely(ipipe_root_domain->cpudata[cpuid].irq_pending_hi !=3D=

           0)) {
               local_irq_disable_hw();
               __ipipe_sync_pipeline(IPIPE_IRQMASK_ANY);
       }
       local_irq_enable_hw();
#endif /* CONFIG_SMP */

So we can still save one disable IRQ in the fastpath.

Jan


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