zhao, forrest wrote:
On Fri, 2006-06-09 at 12:47 +0900, Tejun Heo wrote:
If we're gonna do it. EH needs only a few changes probably during
autopsy and report. Fixing up command issue path and implementing
command exclusion (NCQ vs. non-NCQ, sil24 does it in hardware, ahci
doesn't) will be a bit complex though.
Would you please elaborate on command exclusion? Why NCQ commands need
to be excluded from non-NCQ commands?
For one thing, getting the command ordering right (particularly with
regards to barriers) isn't trivial... also, you need exclusion for
major feature changes like set xfer mode.
Jeff
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