On 3/27/2013 2:22 PM, Alexander Motin wrote:
Hi.
Since FreeBSD 9.0 we are successfully running on the new CAM-based ATA
stack, using only some controller drivers of old ata(4) by having
`options ATA_CAM` enabled in all kernels by default. I have a wish to
drop non-ATA_CAM ata(4) code, unused since that time from the head
branch to allow further ATA code cleanup.
Does any one here still uses legacy ATA stack (kernel explicitly built
without `options ATA_CAM`) for some reason, for example as workaround
for some regression? Does anybody have good ideas why we should not
drop it now?
Some people have expressed performance concerns about ATA_CAM. I have
not validated those concerns. Does anyone know of any?
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