Messages in this thread | | | Date | Thu, 29 Jun 2006 14:50:56 +0200 | From | Rafał Bilski <> | Subject | Re: [PATCH] (Longhaul 1/5) PCI: Protect bus master DMA from Longhaul by rw semaphores |
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Bart Hartgers napisał(a): > Alan Cox wrote: >> Ar Mer, 2006-06-28 am 20:25 +0200, ysgrifennodd Rafał Bilski: >>> AUTOHALT, this means interrupts must be disabled except for the time tick, >>> which should be reset to >=1ms. Care must be taken to avoid other system events >>> that could interfere with this operation. A few examples are snooping, NMI, >>> INIT, SMI and FLUSH." >> "snooping". So we do need the cache sorting out. >> > > If I understand correctly, trouble occurs when the processor tries to > snoop? Would disabling (via MSR) and flushing the caches before changing > the frequency help in that case? > > Groeten, > Bart >
I will check that. If this was so simple all this time... I hope this "few examples" aren't many more.
Rafał
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