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Re: Legacy IDE to be removed



Hi Michael!

On 3/22/21 3:31 AM, Michael Schmitz wrote:
> note that the libata driver for Falcon does not utilize interrupts due to the
> interaction between IDE, SCSI and floppy hardware, the latter two also making
> use of the ST-DMA chip which cannot be transparently checked for DMA completion.
> 
> Instead, the libata driver polls for IDE command completion. This may add a little
> latency, but that's probably offset by the lack of contention between IDE and SCSI
> drivers in mixed IDE / SCSI operation. In my tests, I haven't found any substantial
> impact from the driver change (and I was quite sceptical of the libata driver performance).

Is this a fundamental limitation of libata that interrupts are not supported or just
a limitation of pata_falcon?

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913


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