Messages in this thread | | | Date | Thu, 16 Oct 1997 07:27:50 +0300 (IST) | From | Gadi Oxman <> | Subject | Re: serial input overrun(s) using ide-cd |
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On Wed, 15 Oct 1997, John Kelly wrote:
> But in no case should Linux BY DEFAULT disable interrupts during IDE > disk I/O. If FreeBSD does not, why should Linux?
Using safe defaults, in combination with a user-level tool which enables additional performance features, has the potential to be efficient, while still supporting low-end hardware.
In any case, current IDE designs support bus mastering DMA transfers, and the kernel enables DMA automatically in many cases.
When using DMA instead of PIO, the kernel no longer spends much time handling IDE interrupts, and it therefore doesn't matter whether we will enable or disable interrupts during IDE I/O.
Gadi
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