Alan Cox wrote:
ty today, with 3+ month kernel release cycles (ugh!!).
I'm very much interested in hearing suggestions and comments.
I think PMP should go in for 2.6.24 and then get revised over time to not
poll and to go via qc_issue. Which seems to be the consensus of everyone
but you on this one.
It's not an "over time" issue. SAS drivers that will be ready for
2.6.24 (broadsas, mvsas) have both been coded to support PMP
transparently -- but the current libata PMP code requires that PMP
support in SAS be TURNED OFF, because it is fundamentally incompatible
by its design.
This is an issue that has been present and known for many, many months
-- as long as drivers/scsi/libsas/sas_ata.c has been in the tree.
The more we walk down the polling path, the more incompatible we become
with SATA-capable controllers that are in users' hands today.
Jeff
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