Messages in this thread Patch in this message |  | | | Date | Sat, 4 Mar 2006 12:35:05 -0500 | | From | Jeff Garzik <> | | Subject | [PATCH] AHCI prefetch |
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This patch has been sitting in my tmp directory for ages.
We should probably turn this on, though the practical difference is probably minimal.
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index 4e96ec5..973a794 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -64,8 +64,10 @@ enum { AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ + AHCI_RX_FIS_SZ, AHCI_IRQ_ON_SG = (1 << 31), + AHCI_CMD_ATAPI = (1 << 5), AHCI_CMD_WRITE = (1 << 6), + AHCI_CMD_PREFETCH = (1 << 7), RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */ @@ -533,7 +535,7 @@ static void ahci_qc_prep(struct ata_queu if (qc->tf.flags & ATA_TFLAG_WRITE) opts |= AHCI_CMD_WRITE; if (is_atapi_taskfile(&qc->tf)) - opts |= AHCI_CMD_ATAPI; + opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; pp->cmd_slot[0].opts = cpu_to_le32(opts); pp->cmd_slot[0].status = 0; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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