Re: [PATCH] (Longhaul 1/5) PCI: Protect bus master DMA from Longhaul by rw semaphores

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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


----------------------------------------------------------------------
PS. Fajny portal... >>> http://link.interia.pl/f196a

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux