From: "Rafał Bilski" <rafalbilski@interia.pl>
To: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] (Longhaul 1/5) PCI: Protect bus master DMA from Longhaul by rw semaphores
Date: Thu, 29 Jun 2006 14:50:56 +0200 [thread overview]
Message-ID: <44A3CCB0.7080208@interia.pl> (raw)
In-Reply-To: <44A3C17F.3060204@etpmod.phys.tue.nl>
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
next prev parent reply other threads:[~2006-06-29 12:51 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-28 18:25 [PATCH] (Longhaul 1/5) PCI: Protect bus master DMA from Longhaul by rw semaphores Rafał Bilski
2006-06-29 11:37 ` Alan Cox
2006-06-29 12:03 ` Bart Hartgers
2006-06-29 12:50 ` Rafał Bilski [this message]
2006-06-29 14:12 ` Rafał Bilski
2006-06-29 15:01 ` Bart Hartgers
2006-06-29 15:40 ` Rafał Bilski
2006-06-30 10:46 ` Bart Hartgers
2006-06-29 15:16 ` Bart Hartgers
2006-06-29 15:55 ` Alan Cox
2006-06-29 18:54 ` Rafał Bilski
2006-06-29 15:52 ` Alan Cox
[not found] <fa.lpmuYQxc6OV7Bh11JMM/FzqVWyY@ifi.uio.no>
2006-06-29 23:17 ` Robert Hancock
2006-07-01 18:02 ` Rafał Bilski
-- strict thread matches above, loose matches on Subject: below --
2006-06-28 13:56 Rafał Bilski
2006-06-28 17:34 ` Greg KH
2006-06-28 18:03 ` Alan Cox
2006-06-28 18:00 ` Jeremy Fitzhardinge
2006-06-28 18:10 ` Dave Jones
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