Messages in this thread | | | Date | Sat, 18 Dec 1999 17:17:07 -0500 | From | Mark Lord <> | Subject | Re: More on the IDE multiwrite problem |
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Jes Sorensen wrote: .. > Dave> To handle all cases, if we did callbacks, we should need a > Dave> default one which did the disable_irq/enable_irq trick. > > This is still way better than enforcing the use of > disable_irq()/enable_irq() on everybody.
No it isn't, because the end result would still be the same for most systems: this code would almost NEVER be executed.
All systems built in the past few years now use DMA transfers for the IDE bus, completely bypassing the multwrite code.
The disable/enable is just to continue doing what we have been doing all along, but is only needed with older chipsets that cannot do DMA. -- Mark Lord Real-Time Remedies Inc. mlord@pobox.com
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